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Java Notes for Professionals book

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Content

1-1Content list

1-2About

1-3Chapter 1: Getting started with Java Language

1-4Section 1.1: Creating Your First Java Program

1-5Chapter 2: Type Conversion

1-6Section 2.1: Numeric primitive casting

1-7Section 2.2: Basic Numeric Promotion

1-8Section 2.3: Non-numeric primitive casting

1-9Section 2.4: Object casting

1-10Section 2.5: Testing if an object can be cast using instanceof

1-11Chapter 3: Getters and Setters

1-12Section 3.1: Using a setter or getter to implement a constraint

1-13Section 3.2: Why Use Getters and Setters?

1-14Section 3.3: Adding Getters and Setters

1-15Chapter 4: Reference Data Types

1-16Section 4.1: Dereferencing

1-17Section 4.2: Instantiating a reference type

1-18Chapter 5: Java Compiler - 'javac'

1-19Section 5.1: The 'javac' command - getting started

1-20Section 5.2: Compiling for a dierent version of Java

1-21Chapter 6: Documenting Java Code

1-22Section 6.1: Building Javadocs From the Command Line

1-23Section 6.2: Class Documentation

1-24Section 6.3: Method Documentation

1-25Section 6.4: Package Documentation

1-26Section 6.5: Links

1-27Section 6.6: Code snippets inside documentation

1-28Section 6.7: Field Documentation

1-29Section 6.8: Inline Code Documentation

1-30Chapter 7: Command line Argument Processing

1-31Section 7.1: Argument processing using GWT ToolBase

1-32Section 7.2: Processing arguments by hand

1-33Chapter 8: The Java Command - 'java' and 'javaw'

1-34Section 8.1: Entry point classes

1-35Section 8.2: Troubleshooting the 'java' command

1-36Section 8.3: Running a Java application with library dependencies

1-37Section 8.4: Java Options

1-38Section 8.5: Spaces and other special characters in arguments

1-39Section 8.6: Running an executable JAR ﬁle

1-40Section 8.7: Running a Java applications via a "main" class

1-41Chapter 9: Literals

1-42Section 9.1: Using underscore to improve readability

1-43Section 9.2: Hexadecimal, Octal and Binary literals

1-44Section 9.3: Boolean literals

1-45Section 9.4: String literals

1-46Section 9.5: The Null literal

1-47Section 9.6: Escape sequences in literals

1-48Section 9.7: Character literals

1-49Section 9.8: Decimal Integer literals

1-50Section 9.9: Floating-point literals

1-51Chapter 10: Primitive Data Types

1-52Section 10.1: The char primitive

1-53Section 10.2: Primitive Types Cheatsheet

1-54Section 10.3: The ﬂoat primitive

1-55Section 10.4: The int primitive

1-56Section 10.5: Converting Primitives

1-57Section 10.6: Memory consumption of primitives vs. boxed primitives

1-58Section 10.7: The double primitive

1-59Section 10.8: The long primitive

1-60Section 10.9: The boolean primitive

1-61Section 10.10: The byte primitive

1-62Section 10.11: Negative value representation

1-63Section 10.12: The short primitive

1-64Chapter 11: Strings

1-65Section 11.1: Comparing Strings

1-66Section 11.2: Changing the case of characters within a String

1-67Section 11.3: Finding a String Within Another String

1-68Section 11.4: String pool and heap storage

1-69Section 11.5: Splitting Strings

1-70Section 11.6: Joining Strings with a delimiter

1-71Section 11.7: String concatenation and StringBuilders

1-72Section 11.8: Substrings

1-73Section 11.9: Platform independent new line separator

1-74Section 11.10: Reversing Strings

1-75Section 11.11: Adding toString() method for custom objects

1-76Section 11.12: Remove Whitespace from the Beginning and End of a String

1-77Section 11.13: Case insensitive switch

1-78Section 11.14: Replacing parts of Strings

1-79Section 11.15: Getting the length of a String

1-80Section 11.16: Getting the nth character in a String

1-81Section 11.17: Counting occurrences of a substring or character in a string

1-82Chapter 12: StringBuer

1-83Section 12.1: String Buer class

1-84Chapter 13: StringBuilder

1-85Section 13.1: Comparing StringBuer, StringBuilder, Formatter and StringJoiner

1-86Section 13.2: Repeat a String n times

1-87Chapter 14: String Tokenizer

1-88Section 14.1: StringTokenizer Split by space

1-89Section 14.2: StringTokenizer Split by comma ','

1-90Chapter 15: Splitting a string into ﬁxed length parts

1-91Section 15.1: Break a string up into substrings all of a known length

1-92Section 15.2: Break a string up into substrings all of variable length

1-93Chapter 16: Date Class

1-94Section 16.1: Convert java.util.Date to java.sql.Date

1-95Section 16.2: A basic date output

1-96Section 16.3: Java 8 LocalDate and LocalDateTime objects

1-97Section 16.4: Creating a Speciﬁc Date

1-98Section 16.5: Converting Date to a certain String format

1-99Section 16.6: LocalTime

1-100Section 16.7: Convert formatted string representation of date to Date object

1-101Section 16.8: Creating Date objects

1-102Section 16.9: Comparing Date objects

1-103Section 16.10: Converting String into Date

1-104Section 16.11: Time Zones and java.util.Date

1-105Chapter 17: Dates and Time (java.time.*)

1-106Section 17.1: Calculate Dierence between 2 LocalDates

1-107Section 17.2: Date and time

1-108Section 17.3: Operations on dates and times

1-109Section 17.4: Instant

1-110Section 17.5: Usage of various classes of Date Time API

1-111Section 17.6: Date Time Formatting

1-112Section 17.7: Simple Date Manipulations

1-113Chapter 18: LocalTime

1-114Section 18.1: Amount of time between two LocalTime

1-115Section 18.2: Intro

1-116Section 18.3: Time Modiﬁcation

1-117Section 18.4: Time Zones and their time dierence

1-118Chapter 19: BigDecimal

1-119Section 19.1: Comparing BigDecimals

1-120Section 19.2: Using BigDecimal instead of ﬂoat

1-121Section 19.3: BigDecimal.valueOf()

1-122Section 19.4: Mathematical operations with BigDecimal

1-123Section 19.5: Initialization of BigDecimals with value zero, one or ten

1-124Section 19.6: BigDecimal objects are immutable

1-125Chapter 20: BigInteger

1-126Section 20.1: Initialization

1-127Section 20.2: BigInteger Mathematical Operations Examples

1-128Section 20.3: Comparing BigIntegers

1-129Section 20.4: Binary Logic Operations on BigInteger

1-130Section 20.5: Generating random BigIntegers

1-131Chapter 21: NumberFormat

1-132Section 21.1: NumberFormat

1-133Chapter 22: Bit Manipulation

1-134Section 22.1: Checking, setting, clearing, and toggling individual bits. Using long as bit mask

1-135Section 22.2: java.util.BitSet class

1-136Section 22.3: Checking if a number is a power of 2

1-137Section 22.4: Signed vs unsigned shift

1-138Section 22.5: Expressing the power of 2

1-139Section 22.6: Packing / unpacking values as bit fragments

1-140Chapter 23: Arrays

1-141Section 23.1: Creating and Initializing Arrays

1-142Section 23.2: Creating a List from an Array

1-143Section 23.3: Creating an Array from a Collection

1-144Section 23.4: Multidimensional and Jagged Arrays

1-145Section 23.5: ArrayIndexOutOfBoundsException

1-146Section 23.6: Array Covariance

1-147Section 23.7: Arrays to Stream

1-148Section 23.8: Iterating over arrays

1-149Section 23.9: Arrays to a String

1-150Section 23.10: Sorting arrays

1-151Section 23.11: Getting the Length of an Array

1-152Section 23.12: Finding an element in an array

1-153Section 23.13: How do you change the size of an array?

1-154Section 23.14: Converting arrays between primitives and boxed types

1-155Section 23.15: Remove an element from an array

1-156Section 23.16: Comparing arrays for equality

1-157Section 23.17: Copying arrays

1-158Section 23.18: Casting Arrays

1-159Chapter 24: Collections

1-160Section 24.1: Removing items from a List within a loop

1-161Section 24.2: Constructing collections from existing data

1-162Section 24.3: Declaring an ArrayList and adding objects

1-163Section 24.4: Iterating over Collections

1-164Section 24.5: Immutable Empty Collections

1-165Section 24.6: Sub Collections

1-166Section 24.7: Unmodiﬁable Collection

1-167Section 24.8: Pitfall: concurrent modiﬁcation exceptions

1-168Section 24.9: Removing matching items from Lists using Iterator

1-169Section 24.10: Join lists

1-170Section 24.11: Creating your own Iterable structure for use with Iterator or for-each loop

1-171Section 24.12: Collections and Primitive Values

1-172Chapter 25: Lists

1-173Section 25.1: Sorting a generic list

1-174Section 25.2: Convert a list of integers to a list of strings

1-175Section 25.3: Classes implementing List - Pros and Cons

1-176Section 25.4: Finding common elements between 2 lists

1-177Section 25.5: In-place replacement of a List element

1-178Section 25.6: Making a list unmodiﬁable

1-179Section 25.7: Moving objects around in the list

1-180Section 25.8: Creating, Adding and Removing element from an ArrayList

1-181Section 25.9: Creating a List

1-182Section 25.10: Positional Access Operations

1-183Section 25.11: Iterating over elements in a list

1-184Section 25.12: Removing elements from list B that are present in the list A

1-185Chapter 26: Sets

1-186Section 26.1: Initialization

1-187Section 26.2: Basics of Set

1-188Section 26.3: Types and Usage of Sets

1-189Section 26.4: Create a list from an existing Set

1-190Section 26.5: Eliminating duplicates using Set

1-191Section 26.6: Declaring a HashSet with values

1-192Chapter 27: List vs Set

1-193Section 27.1: List vs Set

1-194Chapter 28: Maps

1-195Section 28.1: Iterating Map Entries Eciently

1-196Section 28.2: Usage of HashMap

1-197Section 28.3: Using Default Methods of Map from Java 8

1-198Section 28.4: Iterating through the contents of a Map

1-199Section 28.5: Merging, combine and composing Maps

1-200Section 28.6: Add multiple items

1-201Section 28.7: Creating and Initializing Maps

1-202Section 28.8: Check if key exists

1-203Section 28.9: Add an element

1-204Section 28.10: Clear the map

1-205Section 28.11: Use custom object as key

1-206Chapter 29: LinkedHashMap

1-207Section 29.1: Java LinkedHashMap class

1-208Chapter 30: WeakHashMap

1-209Section 30.1: Concepts of WeakHashmap

1-210Chapter 31: SortedMap

1-211Section 31.1: Introduction to sorted Map

1-212Chapter 32: TreeMap and TreeSet

1-213Section 32.1: TreeMap of a simple Java type

1-214Section 32.2: TreeSet of a simple Java Type

1-215Section 32.3: TreeMap/TreeSet of a custom Java type

1-216Section 32.4: TreeMap and TreeSet Thread Safety

1-217Chapter 33: Queues and Deques

1-218Section 33.1: The usage of the PriorityQueue

1-219Section 33.2: Deque

1-220Section 33.3: Stacks

1-221Section 33.4: BlockingQueue

1-222Section 33.5: LinkedList as a FIFO Queue

1-223Section 33.6: Queue Interface

1-224Chapter 34: Dequeue Interface

1-225Section 34.1: Adding Elements to Deque

1-226Section 34.2: Removing Elements from Deque

1-227Section 34.3: Retrieving Element without Removing

1-228Section 34.4: Iterating through Deque

1-229Chapter 35: Enums

1-230Section 35.1: Declaring and using a basic enum

1-231Section 35.2: Enums with constructors

1-232Section 35.3: Enums with Abstract Methods

1-233Section 35.4: Implements Interface

1-234Section 35.5: Implement Singleton pattern with a single-element enum

1-235Section 35.6: Using methods and static blocks

1-236Section 35.7: Zero instance enum

1-237Section 35.8: Enum as a bounded type parameter

1-238Section 35.9: Documenting enums

1-239Section 35.10: Enum constant speciﬁc body

1-240Section 35.11: Getting the values of an enum

1-241Section 35.12: Enum Polymorphism Pattern

1-242Section 35.13: Compare and Contains for Enum values

1-243Section 35.14: Get enum constant by name

1-244Section 35.15: Enum with properties (ﬁelds)

1-245Section 35.16: Convert enum to String

1-246Section 35.17: Enums with static ﬁelds

1-247Chapter 36: Enum Map

1-248Section 36.1: Enum Map Book Example

1-249Chapter 37: EnumSet class

1-250Section 37.1: Enum Set Example

1-251Chapter 38: Enum starting with number

1-252Section 38.1: Enum with name at beginning

1-253Chapter 39: Hashtable

1-254Section 39.1: Hashtable

1-255Chapter 40: Operators

1-256Section 40.1: The Increment/Decrement Operators (++/--)

1-257Section 40.2: The Conditional Operator (? :)

1-258Section 40.3: The Bitwise and Logical Operators (~, &, |, ^)

1-259Section 40.4: The String Concatenation Operator (+)

1-260Section 40.5: The Arithmetic Operators (+, -, *, /, %)

1-261Section 40.6: The Shift Operators (<<, >> and >>>)

1-262Section 40.7: The Instanceof Operator

1-263Section 40.8: The Assignment Operators (=, +=, -=, *=, /=, %=, <<=, >>= , >>>=, &=, |= and ^=)

1-264Section 40.9: The conditional-and and conditional-or Operators ( && and || )

1-265Section 40.10: The Relational Operators (<, <=, >, >=)

1-266Section 40.11: The Equality Operators (==, !=)

1-267Section 40.12: The Lambda operator ( -> )

1-268Chapter 41: Constructors

1-269Section 41.1: Default Constructor

1-270Section 41.2: Call parent constructor

1-271Section 41.3: Constructor with Arguments

1-272Chapter 42: Object Class Methods and Constructor

1-273Section 42.1: hashCode() method

1-274Section 42.2: toString() method

1-275Section 42.3: equals() method

1-276Section 42.4: wait() and notify() methods

1-277Section 42.5: getClass() method

1-278Section 42.6: clone() method

1-279Section 42.7: Object constructor

1-280Section 42.8: ﬁnalize() method

1-281Chapter 43: Annotations

1-282Section 43.1: The idea behind Annotations

1-283Section 43.2: Deﬁning annotation types

1-284Section 43.3: Runtime annotation checks via reﬂection

1-285Section 43.4: Built-in annotations

1-286Section 43.5: Compile time processing using annotation processor

1-287Section 43.6: Repeating Annotations

1-288Section 43.7: Inherited Annotations

1-289Section 43.8: Getting Annotation values at run-time

1-290Section 43.9: Annotations for 'this' and receiver parameters

1-291Section 43.10: Add multiple annotation values

1-292Chapter 44: Immutable Class

1-293Section 44.1: Example without mutable refs

1-294Section 44.2: What is the advantage of immutability?

1-295Section 44.3: Rules to deﬁne immutable classes

1-296Section 44.4: Example with mutable refs

1-297Chapter 45: Immutable Objects

1-298Section 45.1: Creating an immutable version of a type using defensive copying

1-299Section 45.2: The recipe for an immutable class

1-300Section 45.3: Typical design ﬂaws which prevent a class from being immutable

1-301Chapter 46: Visibility (controlling access to members of a class)

1-302Section 46.1: Private Visibility

1-303Section 46.2: Public Visibility

1-304Section 46.3: Package Visibility

1-305Section 46.4: Protected Visibility

1-306Section 46.5: Summary of Class Member Access Modiﬁers

1-307Section 46.6: Interface members

1-308Chapter 47: Generics

1-309Section 47.1: Creating a Generic Class

1-310Section 47.2: Deciding between `T`, `? super T`, and `? extends T`

1-311Section 47.3: The Diamond

1-312Section 47.4: Declaring a Generic Method

1-313Section 47.5: Requiring multiple upper bounds ("extends A & B")

1-314Section 47.6: Obtain class that satisﬁes generic parameter at runtime

1-315Section 47.7: Beneﬁts of Generic class and interface

1-316Section 47.8: Instantiating a generic type

1-317Section 47.9: Creating a Bounded Generic Class

1-318Section 47.10: Referring to the declared generic type within its own declaration

1-319Section 47.11: Binding generic parameter to more than 1 type

1-320Section 47.12: Using Generics to auto-cast

1-321Section 47.13: Use of instanceof with Generics

1-322Section 47.14: Dierent ways for implementing a Generic Interface (or extending a Generic Class)

1-323Chapter 48: Classes and Objects

1-324Section 48.1: Overloading Methods

1-325Section 48.2: Explaining what is method overloading and overriding

1-326Section 48.3: Constructors

1-327Section 48.4: Initializing static ﬁnal ﬁelds using a static initializer

1-328Section 48.5: Basic Object Construction and Use

1-329Section 48.6: Simplest Possible Class

1-330Section 48.7: Object Member vs Static Member

1-331Chapter 49: Local Inner Class

1-332Section 49.1: Local Inner Class

1-333Chapter 50: Nested and Inner Classes

1-334Section 50.1: A Simple Stack Using a Nested Class

1-335Section 50.2: Static vs Non Static Nested Classes

1-336Section 50.3: Access Modiﬁers for Inner Classes

1-337Section 50.4: Anonymous Inner Classes

1-338Section 50.5: Create instance of non-static inner class from outside

1-339Section 50.6: Method Local Inner Classes

1-340Section 50.7: Accessing the outer class from a non-static inner class

1-341Chapter 51: The java.util.Objects Class

1-342Section 51.1: Basic use for object null check

1-343Section 51.2: Objects.nonNull() method reference use in stream api

1-344Chapter 52: Default Methods

1-345Section 52.1: Basic usage of default methods

1-346Section 52.2: Accessing overridden default methods from implementing class

1-347Section 52.3: Why use Default Methods?

1-348Section 52.4: Accessing other interface methods within default method

1-349Section 52.5: Default method multiple inheritance collision

1-350Section 52.6: Class, Abstract class and Interface method precedence

1-351Chapter 53: Packages

1-352Section 53.1: Using Packages to create classes with the same name

1-353Section 53.2: Using Package Protected Scope

1-354Chapter 54: Inheritance

1-355Section 54.1: Inheritance

1-356Section 54.2: Abstract Classes

1-357Section 54.3: Using 'ﬁnal' to restrict inheritance and overriding

1-358Section 54.4: The Liskov Substitution Principle

1-359Section 54.5: Abstract class and Interface usage: "Is-a" relation vs "Has-a" capability

1-360Section 54.6: Static Inheritance

1-361Section 54.7: Programming to an interface

1-362Section 54.8: Overriding in Inheritance

1-363Section 54.9: Variable shadowing

1-364Section 54.10: Narrowing and Widening of object references

1-365Section 54.11: Inheritance and Static Methods

1-366Chapter 55: Reference Types

1-367Section 55.1: Dierent Reference Types

1-368Chapter 56: Console I/O

1-369Section 56.1: Reading user input from the console

1-370Section 56.2: Aligning strings in console

1-371Section 56.3: Implementing Basic Command-Line Behavior

1-372Chapter 57: Streams

1-373Section 57.1: Using Streams

1-374Section 57.2: Consuming Streams

1-375Section 57.3: Creating a Frequency Map

1-376Section 57.4: Inﬁnite Streams

1-377Section 57.5: Collect Elements of a Stream into a Collection

1-378Section 57.6: Using Streams to Implement Mathematical Functions

1-379Section 57.7: Flatten Streams with ﬂatMap()

1-380Section 57.8: Parallel Stream

1-381Section 57.9: Creating a Stream

1-382Section 57.10: Finding Statistics about Numerical Streams

1-383Section 57.11: Converting an iterator to a stream

1-384Section 57.12: Using IntStream to iterate over indexes

1-385Section 57.13: Concatenate Streams

1-386Section 57.14: Reduction with Streams

1-387Section 57.15: Using Streams of Map.Entry to Preserve Initial Values after Mapping

1-388Section 57.16: IntStream to String

1-389Section 57.17: Finding the First Element that Matches a Predicate

1-390Section 57.18: Using Streams and Method References to Write Self-Documenting Processes

1-391Section 57.19: Converting a Stream of Optional to a Stream of Values

1-392Section 57.20: Get a Slice of a Stream

1-393Section 57.21: Create a Map based on a Stream

1-394Section 57.22: Joining a stream to a single String

1-395Section 57.23: Sort Using Stream

1-396Section 57.24: Streams of Primitives

1-397Section 57.25: Stream operations categories

1-398Section 57.26: Collect Results of a Stream into an Array

1-399Section 57.27: Generating random Strings using Streams

1-400Chapter 58: InputStreams and OutputStreams

1-401Section 58.1: Closing Streams

1-402Section 58.2: Reading InputStream into a String

1-403Section 58.3: Wrapping Input/Output Streams

1-404Section 58.4: DataInputStream Example

1-405Section 58.5: Writing bytes to an OutputStream

1-406Section 58.6: Copying Input Stream to Output Stream

1-407Chapter 59: Readers and Writers

1-408Section 59.1: BueredReader

1-409Section 59.2: StringWriter Example

1-410Chapter 60: Preferences

1-411Section 60.1: Using preferences

1-412Section 60.2: Adding event listeners

1-413Section 60.3: Getting sub-nodes of Preferences

1-414Section 60.4: Coordinating preferences access across multiple application instances

1-415Section 60.5: Exporting preferences

1-416Section 60.6: Importing preferences

1-417Section 60.7: Removing event listeners

1-418Section 60.8: Getting preferences values

1-419Section 60.9: Setting preferences values

1-420Chapter 61: Collection Factory Methods

1-421Section 61.1: List<E> Factory Method Examples

1-422Section 61.2: Set<E> Factory Method Examples

1-423Section 61.3: Map<K, V> Factory Method Examples

1-424Chapter 62: Alternative Collections

1-425Section 62.1: Multimap in Guava, Apache and Eclipse Collections

1-426Section 62.2: Apache HashBag, Guava HashMultiset and Eclipse HashBag

1-427Section 62.3: Compare operation with collections - Create collections

1-428Chapter 63: Concurrent Collections

1-429Section 63.1: Thread-safe Collections

1-430Section 63.2: Insertion into ConcurrentHashMap

1-431Section 63.3: Concurrent Collections

1-432Chapter 64: Choosing Collections

1-433Section 64.1: Java Collections Flowchart

1-434Chapter 65: super keyword

1-435Section 65.1: Super keyword use with examples

1-436Chapter 66: Serialization

1-437Section 66.1: Basic Serialization in Java

1-438Section 66.2: Custom Serialization

1-439Section 66.3: Versioning and serialVersionUID

1-440Section 66.4: Serialization with Gson

1-441Section 66.5: Custom JSON Deserialization with Jackson

1-442Chapter 67: Optional

1-443Section 67.1: Map

1-444Section 67.2: Return default value if Optional is empty

1-445Section 67.3: Throw an exception, if there is no value

1-446Section 67.4: Lazily provide a default value using a Supplier

1-447Section 67.5: Filter

1-448Section 67.6: Using Optional containers for primitive number types

1-449Section 67.7: Run code only if there is a value present

1-450Section 67.8: FlatMap

1-451Chapter 68: Object References

1-452Section 68.1: Object References as method parameters

1-453Chapter 69: Exceptions and exception handling

1-454Section 69.1: Catching an exception with try-catch

1-455Section 69.2: The try-with-resources statement

1-456Section 69.3: Custom Exceptions

1-457Section 69.4: Handling InterruptedException

1-458Section 69.5: Return statements in try catch block

1-459Section 69.6: Introduction

1-460Section 69.7: The Java Exception Hierarchy - Unchecked and Checked Exceptions

1-461Section 69.8: Creating and reading stacktraces

1-462Section 69.9: Throwing an exception

1-463Section 69.10: Advanced features of Exceptions

1-464Section 69.11: The try-ﬁnally and try-catch-ﬁnally statements

1-465Section 69.12: The 'throws' clause in a method declaration

1-466Chapter 70: Calendar and its Subclasses

1-467Section 70.1: Creating Calendar objects

1-468Section 70.2: Increasing / Decreasing calendar ﬁelds

1-469Section 70.3: Subtracting calendars

1-470Section 70.4: Finding AM/PM

1-471Chapter 71: Using the static keyword

1-472Section 71.1: Reference to non-static member from static context

1-473Section 71.2: Using static to declare constants

1-474Chapter 72: Properties Class

1-475Section 72.1: Loading properties

1-476Section 72.2: Saving Properties as XML

1-477Section 72.3: Property ﬁles caveat: trailing whitespace

1-478Chapter 73: Lambda Expressions

1-479Section 73.1: Introduction to Java lambdas

1-480Section 73.2: Using Lambda Expressions to Sort a Collection

1-481Section 73.3: Method References

1-482Section 73.4: Implementing multiple interfaces

1-483Section 73.5: Lambda - Listener Example

1-484Section 73.6: Java Closures with lambda expressions

1-485Section 73.7: Lambdas and memory utilization

1-486Section 73.8: Using lambda expression with your own functional interface

1-487Section 73.9: Traditional style to Lambda style

1-488Section 73.10: `return` only returns from the lambda, not the outer method

1-489Section 73.11: Lambdas and Execute-around Pattern

1-490Section 73.12: Using lambda expressions & predicates to get a certain value(s) from a list

1-491Chapter 74: Basic Control Structures

1-492Section 74.1: Switch statement

1-493Section 74.2: do...while Loop

1-494Section 74.3: For Each

1-495Section 74.4: Continue Statement in Java

1-496Section 74.5: If / Else If / Else Control

1-497Section 74.6: For Loops

1-498Section 74.7: Ternary Operator

1-499Section 74.8: Try ... Catch ... Finally

1-500Section 74.9: Break

1-501Section 74.10: While Loops

1-502Section 74.11: If / Else

1-503Section 74.12: Nested break / continue

1-504Chapter 75: BueredWriter

1-505Section 75.1: Write a line of text to File

1-506Chapter 76: New File I/O

1-507Section 76.1: Creating paths

1-508Section 76.2: Manipulating paths

1-509Section 76.3: Retrieving information about a path

1-510Section 76.4: Retrieving information using the ﬁlesystem

1-511Section 76.5: Reading ﬁles

1-512Section 76.6: Writing ﬁles

1-513Chapter 77: File I/O

1-514Section 77.1: Migrating from java.io.File to Java 7 NIO (java.nio.ﬁle.Path)

1-515Section 77.2: Reading an image from a ﬁle

1-516Section 77.3: File Read/Write Using FileInputStream/FileOutputStream

1-517Section 77.4: Reading all bytes to a byte[]

1-518Section 77.5: Copying a ﬁle using Channel

1-519Section 77.6: Writing a byte[] to a ﬁle

1-520Section 77.7: Stream vs Writer/Reader API

1-521Section 77.8: Reading a ﬁle with a Scanner

1-522Section 77.9: Copying a ﬁle using InputStream and OutputStream

1-523Section 77.10: Reading from a binary ﬁle

1-524Section 77.11: Reading a ﬁle using Channel and Buer

1-525Section 77.12: Adding Directories

1-526Section 77.13: Blocking or redirecting standard output / error

1-527Section 77.14: Reading a whole ﬁle at once

1-528Section 77.15: Locking

1-529Section 77.16: Reading a ﬁle using BueredInputStream

1-530Section 77.17: Iterate over a directory printing subdirectories in it

1-531Section 77.18: Writing a ﬁle using Channel and Buer

1-532Section 77.19: Writing a ﬁle using PrintStream

1-533Section 77.20: Iterating over a directory and ﬁlter by ﬁle extension

1-534Section 77.21: Accessing the contents of a ZIP ﬁle

1-535Chapter 78: Scanner

1-536Section 78.1: General Pattern that does most commonly asked about tasks

1-537Section 78.2: Using custom delimiters

1-538Section 78.3: Reading system input using Scanner

1-539Section 78.4: Reading ﬁle input using Scanner

1-540Section 78.5: Read the entire input as a String using Scanner

1-541Section 78.6: Carefully Closing a Scanner

1-542Section 78.7: Read an int from the command line

1-543Chapter 79: Interfaces

1-544Section 79.1: Implementing multiple interfaces

1-545Section 79.2: Declaring and Implementing an Interface

1-546Section 79.3: Extending an interface

1-547Section 79.4: Usefulness of interfaces

1-548Section 79.5: Default methods

1-549Section 79.6: Modiﬁers in Interfaces

1-550Section 79.7: Using Interfaces with Generics

1-551Section 79.8: Strengthen bounded type parameters

1-552Section 79.9: Implementing interfaces in an abstract class

1-553Chapter 80: Regular Expressions

1-554Section 80.1: Using capture groups

1-555Section 80.2: Using regex with custom behaviour by compiling the Pattern with ﬂags

1-556Section 80.3: Escape Characters

1-557Section 80.4: Not matching a given string

1-558Section 80.5: Matching with a regex literal

1-559Section 80.6: Matching a backslash

1-560Chapter 81: Comparable and Comparator

1-561Section 81.1: Sorting a List using Comparable<T> or a Comparator<T>

1-562Section 81.2: The compareTo and compare Methods

1-563Section 81.3: Natural (comparable) vs explicit (comparator) sorting

1-564Section 81.4: Creating a Comparator using comparing method

1-565Section 81.5: Sorting Map entries

1-566Chapter 82: Java Floating Point Operations

1-567Section 82.1: Comparing ﬂoating point values

1-568Section 82.2: OverFlow and UnderFlow

1-569Section 82.3: Formatting the ﬂoating point values

1-570Section 82.4: Strict Adherence to the IEEE Speciﬁcation

1-571Chapter 83: Currency and Money

1-572Section 83.1: Add custom currency

1-573Chapter 84: Object Cloning

1-574Section 84.1: Cloning performing a deep copy

1-575Section 84.2: Cloning using a copy factory

1-576Section 84.3: Cloning using a copy constructor

1-577Section 84.4: Cloning by implementing Clonable interface

1-578Section 84.5: Cloning performing a shallow copy

1-579Chapter 85: Recursion

1-580Section 85.1: The basic idea of recursion

1-581Section 85.2: Deep recursion is problematic in Java

1-582Section 85.3: Types of Recursion

1-583Section 85.4: Computing the Nth Fibonacci Number

1-584Section 85.5: StackOverﬂowError & recursion to loop

1-585Section 85.6: Computing the Nth power of a number

1-586Section 85.7: Traversing a Tree data structure with recursion

1-587Section 85.8: Reverse a string using Recursion

1-588Section 85.9: Computing the sum of integers from 1 to N

1-589Chapter 86: Converting to and from Strings

1-590Section 86.1: Converting String to other datatypes

1-591Section 86.2: Conversion to / from bytes

1-592Section 86.3: Base64 Encoding / Decoding

1-593Section 86.4: Converting other datatypes to String

1-594Section 86.5: Getting a `String` from an `InputStream`

1-595Chapter 87: Random Number Generation

1-596Section 87.1: Pseudo Random Numbers

1-597Section 87.2: Pseudo Random Numbers in Speciﬁc Range

1-598Section 87.3: Generating cryptographically secure pseudorandom numbers

1-599Section 87.4: Generating Random Numbers with a Speciﬁed Seed

1-600Section 87.5: Select random numbers without duplicates

1-601Section 87.6: Generating Random number using apache-common lang3

1-602Chapter 88: Singletons

1-603Section 88.1: Enum Singleton

1-604Section 88.2: Singleton without use of Enum (eager initialization)

1-605Section 88.3: Thread-safe lazy initialization using holder class | Bill Pugh Singleton implementation

1-606Section 88.4: Thread safe Singleton with double checked locking

1-607Section 88.5: Extending singleton (singleton inheritance)

1-608Chapter 89: Autoboxing

1-609Section 89.1: Using int and Integer interchangeably

1-610Section 89.2: Auto-unboxing may lead to NullPointerException

1-611Section 89.3: Using Boolean in if statement

1-612Section 89.4: Dierent Cases When Integer and int can be used interchangeably

1-613Section 89.5: Memory and Computational Overhead of Autoboxing

1-614Chapter 90: 2D Graphics in Java

1-615Section 90.1: Example 1: Draw and Fill a Rectangle Using Java

1-616Section 90.2: Example 2: Drawing and Filling Oval

1-617Chapter 91: JAXB

1-618Section 91.1: Reading an XML ﬁle (unmarshalling)

1-619Section 91.2: Writing an XML ﬁle (marshalling an object)

1-620Section 91.3: Manual ﬁeld/property XML mapping conﬁguration

1-621Section 91.4: Binding an XML namespace to a serializable Java class

1-622Section 91.5: Using XmlAdapter to generate desired xml format

1-623Section 91.6: Using XmlAdapter to trim string

1-624Section 91.7: Automatic ﬁeld/property XML mapping conﬁguration (@XmlAccessorType)

1-625Section 91.8: Specifying a XmlAdapter instance to (re)use existing data

1-626Chapter 92: Class - Java Reﬂection

1-627Section 92.1: getClass() method of Object class

1-628Chapter 93: Networking

1-629Section 93.1: Basic Client and Server Communication using a Socket

1-630Section 93.2: Basic Client/Server Communication using UDP (Datagram)

1-631Section 93.3: Loading TrustStore and KeyStore from InputStream

1-632Section 93.4: Socket example - reading a web page using a simple socket

1-633Section 93.5: Temporarily disable SSL veriﬁcation (for testing purposes)

1-634Section 93.6: Downloading a ﬁle using Channel

1-635Section 93.7: Multicasting

1-636Chapter 94: NIO - Networking

1-637Section 94.1: Using Selector to wait for events (example with OP_CONNECT)

1-638Chapter 95: HttpURLConnection

1-639Section 95.1: Get response body from a URL as a String

1-640Section 95.2: POST data

1-641Section 95.3: Delete resource

1-642Section 95.4: Check if resource exists

1-643Chapter 96: JAX-WS

1-644Section 96.1: Basic Authentication

1-645Chapter 97: Nashorn JavaScript engine

1-646Section 97.1: Execute JavaScript ﬁle

1-647Section 97.2: Intercept script output

1-648Section 97.3: Hello Nashorn

1-649Section 97.4: Evaluate Arithmetic Strings

1-650Section 97.5: Set global variables

1-651Section 97.6: Set and get global variables

1-652Section 97.7: Usage of Java objects in JavaScript in Nashorn

1-653Section 97.8: Implementing an interface from script

1-654Chapter 98: Java Native Interface

1-655Section 98.1: Calling C++ methods from Java

1-656Section 98.2: Calling Java methods from C++ (callback)

1-657Section 98.3: Loading native libraries

1-658Chapter 99: Functional Interfaces

1-659Section 99.1: List of standard Java Runtime Library functional interfaces by signature

1-660Chapter 100: Fluent Interface

1-661Section 100.1: Fluent programming style

1-662Section 100.2: Truth - Fluent Testing Framework

1-663Chapter 101: Remote Method Invocation (RMI)

1-664Section 101.1: Callback: invoking methods on a "client"

1-665Section 101.2: Simple RMI example with Client and Server implementation

1-666Section 101.3: Client-Server: invoking methods in one JVM from another

1-667Chapter 102: Iterator and Iterable

1-668Section 102.1: Removing elements using an iterator

1-669Section 102.2: Creating your own Iterable

1-670Section 102.3: Using Iterable in for loop

1-671Section 102.4: Using the raw iterator

1-672Chapter 103: Reﬂection API

1-673Section 103.1: Dynamic Proxies

1-674Section 103.2: Introduction

1-675Section 103.3: Evil Java hacks with Reﬂection

1-676Section 103.4: Misuse of Reﬂection API to change private and ﬁnal variables

1-677Section 103.5: Getting and Setting ﬁelds

1-678Section 103.6: Call constructor

1-679Section 103.7: Call constructor of nested class

1-680Section 103.8: Invoking a method

1-681Section 103.9: Get Class given its (fully qualiﬁed) name

1-682Section 103.10: Getting the Constants of an Enumeration

1-683Section 103.11: Call overloaded constructors using reﬂection

1-684Chapter 104: ByteBuer

1-685Section 104.1: Basic Usage - Using DirectByteBuer

1-686Section 104.2: Basic Usage - Creating a ByteBuer

1-687Section 104.3: Basic Usage - Write Data to the Buer

1-688Chapter 105: Applets

1-689Section 105.1: Minimal Applet

1-690Section 105.2: Creating a GUI

1-691Section 105.3: Open links from within the applet

1-692Section 105.4: Loading images, audio and other resources

1-693Chapter 106: Expressions

1-694Section 106.1: Operator Precedence

1-695Section 106.2: Expression Basics

1-696Section 106.3: Expression evaluation order

1-697Section 106.4: Constant Expressions

1-698Chapter 107: JSON in Java

1-699Section 107.1: Using Jackson Object Mapper

1-700Section 107.2: JSON To Object (Gson Library)

1-701Section 107.3: JSONObject.NULL

1-702Section 107.4: JSON Builder - chaining methods

1-703Section 107.5: Object To JSON (Gson Library)

1-704Section 107.6: JSON Iteration

1-705Section 107.7: optXXX vs getXXX methods

1-706Section 107.8: Extract single element from JSON

1-707Section 107.9: JsonArray to Java List (Gson Library)

1-708Section 107.10: Encoding data as JSON

1-709Section 107.11: Decoding JSON data

1-710Chapter 108: XML Parsing using the JAXP APIs

1-711Section 108.1: Parsing a document using the StAX API

1-712Section 108.2: Parsing and navigating a document using the DOM API

1-713Chapter 109: XML XPath Evaluation

1-714Section 109.1: Parsing multiple XPath Expressions in a single XML

1-715Section 109.2: Parsing single XPath Expression multiple times in an XML

1-716Section 109.3: Evaluating a NodeList in an XML document

1-717Chapter 110: XOM - XML Object Model

1-718Section 110.1: Reading a XML ﬁle

1-719Section 110.2: Writing to a XML File

1-720Chapter 111: Polymorphism

1-721Section 111.1: Method Overriding

1-722Section 111.2: Method Overloading

1-723Section 111.3: Polymorphism and dierent types of overriding

1-724Section 111.4: Virtual functions

1-725Section 111.5: Adding behaviour by adding classes without touching existing code

1-726Chapter 112: Encapsulation

1-727Section 112.1: Encapsulation to maintain invariants

1-728Section 112.2: Encapsulation to reduce coupling

1-729Chapter 113: Java Agents

1-730Section 113.1: Modifying classes with agents

1-731Section 113.2: Adding an agent at runtime

1-732Section 113.3: Setting up a basic agent

1-733Chapter 114: Varargs (Variable Argument)

1-734Section 114.1: Working with Varargs parameters

1-735Section 114.2: Specifying a varargs parameter

1-736Chapter 115: Logging (java.util.logging)

1-737Section 115.1: Logging complex messages (eciently)

1-738Section 115.2: Using the default logger

1-739Section 115.3: Logging levels

1-740Chapter 116: log4j / log4j2

1-741Section 116.1: Properties-File to log to DB

1-742Section 116.2: How to get Log4j

1-743Section 116.3: Setting up property ﬁle

1-744Section 116.4: Basic log4j2.xml conﬁguration ﬁle

1-745Section 116.5: How to use Log4j in Java code

1-746Section 116.6: Migrating from log4j 1.x to 2.x

1-747Section 116.7: Filter Logoutput by level (log4j 1.x)

1-748Chapter 117: Oracle Ocial Code Standard

1-749Section 117.1: Naming Conventions

1-750Section 117.2: Class Structure

1-751Section 117.3: Annotations

1-752Section 117.4: Import statements

1-753Section 117.5: Braces

1-754Section 117.6: Redundant Parentheses

1-755Section 117.7: Modiﬁers

1-756Section 117.8: Indentation

1-757Section 117.9: Literals

1-758Section 117.10: Package declaration

1-759Section 117.11: Lambda Expressions

1-760Section 117.12: Java Source Files

1-761Section 117.13: Wrapping statements

1-762Section 117.14: Wrapping Method Declarations

1-763Section 117.15: Wrapping Expressions

1-764Section 117.16: Whitespace

1-765Section 117.17: Special Characters

1-766Section 117.18: Variable Declarations

1-767Chapter 118: Character encoding

1-768Section 118.1: Reading text from a ﬁle encoded in UTF-8

1-769Section 118.2: Writing text to a ﬁle in UTF-8

1-770Section 118.3: Getting byte representation of a string in UTF-8

1-771Chapter 119: Apache Commons Lang

1-772Section 119.1: Implement equals() method

1-773Section 119.2: Implement hashCode() method

1-774Section 119.3: Implement toString() method

1-775Chapter 120: Localization and Internationalization

1-776Section 120.1: Locale

1-777Section 120.2: Automatically formatted Dates using "locale"

1-778Section 120.3: String Comparison

1-779Chapter 121: Parallel programming with Fork/Join framework

1-780Section 121.1: Fork/Join Tasks in Java

1-781Chapter 122: Non-Access Modiﬁers

1-782Section 122.1: ﬁnal

1-783Section 122.2: static

1-784Section 122.3: abstract

1-785Section 122.4: strictfp

1-786Section 122.5: volatile

1-787Section 122.6: synchronized

1-788Section 122.7: transient

1-789Chapter 123: Process

1-790Section 123.1: Pitfall: Runtime.exec, Process and ProcessBuilder don't understand shell syntax

1-791Section 123.2: Simple example (Java version < 1.5)

1-792Chapter 124: Java Native Access

1-793Section 124.1: Introduction to JNA

1-794Chapter 125: Modules

1-795Section 125.1: Deﬁning a basic module

1-796Chapter 126: Concurrent Programming (Threads)

1-797Section 126.1: Callable and Future

1-798Section 126.2: CountDownLatch

1-799Section 126.3: Basic Multithreading

1-800Section 126.4: Locks as Synchronisation aids

1-801Section 126.5: Semaphore

1-802Section 126.6: Synchronization

1-803Section 126.7: Runnable Object

1-804Section 126.8: Creating basic deadlocked system

1-805Section 126.9: Creating a java.lang.Thread instance

1-806Section 126.10: Atomic operations

1-807Section 126.11: Exclusive write / Concurrent read access

1-808Section 126.12: Producer-Consumer

1-809Section 126.13: Visualizing read/write barriers while using synchronized / volatile

1-810Section 126.14: Get status of all threads started by your program excluding system threads

1-811Section 126.15: Using ThreadLocal

1-812Section 126.16: Multiple producer/consumer example with shared global queue

1-813Section 126.17: Add two `int` arrays using a Threadpool

1-814Section 126.18: Pausing Execution

1-815Section 126.19: Thread Interruption / Stopping Threads

1-816Chapter 127: Executor, ExecutorService and Thread pools

1-817Section 127.1: ThreadPoolExecutor

1-818Section 127.2: Retrieving value from computation - Callable

1-819Section 127.3: submit() vs execute() exception handling dierences

1-820Section 127.4: Handle Rejected Execution

1-821Section 127.5: Fire and Forget - Runnable Tasks

1-822Section 127.6: Use cases for dierent types of concurrency constructs

1-823Section 127.7: Wait for completion of all tasks in ExecutorService

1-824Section 127.8: Use cases for dierent types of ExecutorService

1-825Section 127.9: Scheduling tasks to run at a ﬁxed time, after a delay or repeatedly

1-826Section 127.10: Using Thread Pools

1-827Chapter 128: ThreadLocal

1-828Section 128.1: Basic ThreadLocal usage

1-829Section 128.2: ThreadLocal Java 8 functional initialization

1-830Section 128.3: Multiple threads with one shared object

1-831Chapter 129: Using ThreadPoolExecutor in MultiThreaded applications.

1-832Section 129.1: Performing Asynchronous Tasks Where No Return Value Is Needed Using a Runnable Class Instance

1-833Section 129.2: Performing Asynchronous Tasks Where a Return Value Is Needed Using a Callable Class Instance

1-834Section 129.3: Deﬁning Asynchronous Tasks Inline using Lambdas

1-835Chapter 130: Common Java Pitfalls

1-836Section 130.1: Pitfall: using == to compare primitive wrappers objects such as Integer

1-837Section 130.2: Pitfall: using == to compare strings

1-838Section 130.3: Pitfall: forgetting to free resources

1-839Section 130.4: Pitfall: testing a ﬁle before attempting to open it

1-840Section 130.5: Pitfall: thinking of variables as objects

1-841Section 130.6: Pitfall: memory leaks

1-842Section 130.7: Pitfall: Not understanding that String is an immutable class

1-843Section 130.8: Pitfall: combining assignment and side-eects

1-844Chapter 131: Java Pitfalls - Exception usage

1-845Section 131.1: Pitfall - Catching Throwable, Exception, Error or RuntimeException

1-846Section 131.2: Pitfall - Ignoring or squashing exceptions

1-847Section 131.3: Pitfall - Throwing Throwable, Exception, Error or RuntimeException

1-848Section 131.4: Pitfall - Using exceptions for normal ﬂowcontrol

1-849Section 131.5: Pitfall - Directly subclassing `Throwable`

1-850Section 131.6: Pitfall - Catching InterruptedException

1-851Section 131.7: Pitfall - Excessive or inappropriate stacktraces

1-852Chapter 132: Java Pitfalls - Language syntax

1-853Section 132.1: Pitfall - Missing a ‘break’ in a 'switch' case

1-854Section 132.2: Pitfall - Declaring classes with the same names as standard classes

1-855Section 132.3: Pitfall - Leaving out braces: the "dangling if" and "dangling else" problems

1-856Section 132.4: Pitfall - Octal literals

1-857Section 132.5: Pitfall - Using '==' to test a boolean

1-858Section 132.6: Pitfall - Ignoring method visibility

1-859Section 132.7: Pitfall: Using 'assert' for argument or user input validation

1-860Section 132.8: Pitfall - Wildcard imports can make your code fragile

1-861Section 132.9: Pitfall - Misplaced semicolons and missing braces

1-862Section 132.10: Pitfall - Overloading instead of overriding

1-863Section 132.11: Pitfall of Auto-Unboxing Null Objects into Primitives

1-864Chapter 133: Java Pitfalls - Threads and Concurrency

1-865Section 133.1: Pitfall - Extending 'java.lang.Thread'

1-866Section 133.2: Pitfall - Too many threads makes an application slower

1-867Section 133.3: Pitfall: incorrect use of wait() / notify()

1-868Section 133.4: Pitfall: Shared variables require proper synchronization

1-869Section 133.5: Pitfall - Thread creation is relatively expensive

1-870Chapter 134: Java Pitfalls - Nulls and NullPointerException

1-871Section 134.1: Pitfall - "Making good" unexpected nulls

1-872Section 134.2: Pitfall - Using null to represent an empty array or collection

1-873Section 134.3: Pitfall - Not checking if an I/O stream isn't even initialized when closing it

1-874Section 134.4: Pitfall - Returning null instead of throwing an exception

1-875Section 134.5: Pitfall - Unnecessary use of Primitive Wrappers can lead to NullPointerExceptions

1-876Section 134.6: Pitfall - Using "Yoda notation" to avoid NullPointerException

1-877Chapter 135: Java Pitfalls - Performance Issues

1-878Section 135.1: Pitfall - String concatenation in a loop does not scale

1-879Section 135.2: Pitfall - Using size() to test if a collection is empty is inecient

1-880Section 135.3: Pitfall - Interning strings so that you can use == is a bad idea

1-881Section 135.4: Pitfall - Using 'new' to create primitive wrapper instances is inecient

1-882Section 135.5: Pitfall - Eciency concerns with regular expressions

1-883Section 135.6: Pitfall - Small reads / writes on unbuered streams are inecient

1-884Section 135.7: Pitfall - Over-use of primitive wrapper types is inecient

1-885Section 135.8: Pitfall - The overheads of creating log messages

1-886Section 135.9: Pitfall - Iterating a Map's keys can be inecient

1-887Section 135.10: Pitfall - Calling System.gc() is inecient

1-888Section 135.11: Pitfall - Calling 'new String(String)' is inecient

1-889Chapter 136: ServiceLoader

1-890Section 136.1: Simple ServiceLoader Example

1-891Section 136.2: Logger Service

1-892Chapter 137: Classloaders

1-893Section 137.1: Implementing a custom classLoader

1-894Section 137.2: Loading an external .class ﬁle

1-895Section 137.3: Instantiating and using a classloader

1-896Chapter 138: Creating Images Programmatically

1-897Section 138.1: Creating a simple image programmatically and displaying it

1-898Section 138.2: Save an Image to disk

1-899Section 138.3: Setting individual pixel's color in BueredImage

1-900Section 138.4: Specifying image rendering quality

1-901Section 138.5: Creating an image with BueredImage class

1-902Section 138.6: Editing and re-using image with BueredImage

1-903Section 138.7: How to scale a BueredImage

1-904Chapter 139: Atomic Types

1-905Section 139.1: Creating Atomic Types

1-906Section 139.2: Motivation for Atomic Types

1-907Chapter 140: RSA Encryption

1-908Section 140.1: An example using a hybrid cryptosystem consisting of OAEP and GCM

1-909Chapter 141: Secure objects

1-910Section 141.1: SealedObject (javax.crypto.SealedObject)

1-911Section 141.2: SignedObject (java.security.SignedObject)

1-912Chapter 142: Security & Cryptography

1-913Section 142.1: Compute Cryptographic Hashes

1-914Section 142.2: Encrypt and Decrypt Data with Public / Private Keys

1-915Section 142.3: Generate Cryptographically Random Data

1-916Section 142.4: Generate Public / Private Key Pairs

1-917Section 142.5: Compute and Verify Digital Signatures

1-918Chapter 143: Security & Cryptography

1-919Section 143.1: The JCE

1-920Section 143.2: Keys and Key Management

1-921Section 143.3: Common Java vulnerabilities

1-922Section 143.4: Networking Concerns

1-923Section 143.5: Randomness and You

1-924Section 143.6: Hashing and Validation

1-925Chapter 144: SecurityManager

1-926Section 144.1: Sandboxing classes loaded by a ClassLoader

1-927Section 144.2: Enabling the SecurityManager

1-928Section 144.3: Implementing policy deny rules

1-929Chapter 145: JNDI

1-930Section 145.1: RMI through JNDI

1-931Chapter 146: sun.misc.Unsafe

1-932Section 146.1: Instantiating sun.misc.Unsafe via reﬂection

1-933Section 146.2: Instantiating sun.misc.Unsafe via bootclasspath

1-934Section 146.3: Getting Instance of Unsafe

1-935Section 146.4: Uses of Unsafe

1-936Chapter 147: Java Memory Model

1-937Section 147.1: Motivation for the Memory Model

1-938Section 147.2: Happens-before relationships

1-939Section 147.3: How to avoid needing to understand the Memory Model

1-940Section 147.4: Happens-before reasoning applied to some examples

1-941Chapter 148: Java deployment

1-942Section 148.1: Making an executable JAR from the command line

1-943Section 148.2: Creating an UberJAR for an application and its dependencies

1-944Section 148.3: Creating JAR, WAR and EAR ﬁles

1-945Section 148.4: Introduction to Java Web Start

1-946Chapter 149: Java plugin system implementations

1-947Section 149.1: Using URLClassLoader

1-948Chapter 150: JavaBean

1-949Section 150.1: Basic Java Bean

1-950Chapter 151: Java SE 7 Features

1-951Section 151.1: New Java SE 7 programming language features

1-952Section 151.2: Binary Literals

1-953Section 151.3: The try-with-resources statement

1-954Section 151.4: Underscores in Numeric Literals

1-955Section 151.5: Type Inference for Generic Instance Creation

1-956Section 151.6: Strings in switch Statements

1-957Chapter 152: Java SE 8 Features

1-958Section 152.1: New Java SE 8 programming language features

1-959Chapter 153: Dynamic Method Dispatch

1-960Section 153.1: Dynamic Method Dispatch - Example Code

1-961Chapter 154: Generating Java Code

1-962Section 154.1: Generate POJO From JSON

1-963Chapter 155: JShell

1-964Section 155.1: Editting Snippets

1-965Section 155.2: Entering and Exiting JShell

1-966Section 155.3: Expressions

1-967Section 155.4: Methods and Classes

1-968Section 155.5: Variables

1-969Chapter 156: Stack-Walking API

1-970Section 156.1: Print all stack frames of the current thread

1-971Section 156.2: Print current caller class

1-972Section 156.3: Showing reﬂection and other hidden frames

1-973Chapter 157: Sockets

1-974Section 157.1: Read from socket

1-975Chapter 158: Java Sockets

1-976Section 158.1: A simple TCP echo back server

1-977Chapter 159: FTP (File Transfer Protocol)

1-978Section 159.1: Connecting and Logging Into a FTP Server

1-979Chapter 160: Using Other Scripting Languages in Java

1-980Section 160.1: Evaluating A JavaScript ﬁle in -scripting mode of nashorn

1-981Chapter 161: C++ Comparison

1-982Section 161.1: Static Class Members

1-983Section 161.2: Classes Deﬁned within Other Constructs

1-984Section 161.3: Pass-by-value & Pass-by-reference

1-985Section 161.4: Inheritance vs Composition

1-986Section 161.5: Outcast Downcasting

1-987Section 161.6: Abstract Methods & Classes

1-988Chapter 162: Audio

1-989Section 162.1: Play a MIDI ﬁle

1-990Section 162.2: Play an Audio ﬁle Looped

1-991Section 162.3: Basic audio output

1-992Section 162.4: Bare metal sound

1-993Chapter 163: Java Print Service

1-994Section 163.1: Building the Doc that will be printed

1-995Section 163.2: Discovering the available print services

1-996Section 163.3: Deﬁning print request attributes

1-997Section 163.4: Listening print job request status change

1-998Section 163.5: Discovering the default print service

1-999Section 163.6: Creating a print job from a print service

1-1000Chapter 164: CompletableFuture

1-1001Section 164.1: Simple Example of CompletableFuture

1-1002Chapter 165: Runtime Commands

1-1003Section 165.1: Adding shutdown hooks

1-1004Chapter 166: Unit Testing

1-1005Section 166.1: What is Unit Testing?

1-1006Chapter 167: Asserting

1-1007Section 167.1: Checking arithmetic with assert

1-1008Chapter 168: Multi-Release JAR Files

1-1009Section 168.1: Example of a multi-release Jar ﬁle's contents

1-1010Section 168.2: Creating a multi-release Jar using the jar tool

1-1011Section 168.3: URL of a loaded class inside a multi-release Jar

1-1012Chapter 169: Just in Time (JIT) compiler

1-1013Section 169.1: Overview

1-1014Chapter 170: Bytecode Modiﬁcation

1-1015Section 170.1: What is Bytecode?

1-1016Section 170.2: How to edit jar ﬁles with ASM

1-1017Section 170.3: How to load a ClassNode as a Class

1-1018Section 170.4: How to rename classes in a jar ﬁle

1-1019Section 170.5: Javassist Basic

1-1020Chapter 171: Disassembling and Decompiling

1-1021Section 171.1: Viewing bytecode with javap

1-1022Chapter 172: JMX

1-1023Section 172.1: Simple example with Platform MBean Server

1-1024Chapter 173: Java Virtual Machine (JVM)

1-1025Section 173.1: These are the basics

1-1026Chapter 174: XJC

1-1027Section 174.1: Generating Java code from simple XSD ﬁle

1-1028Chapter 175: JVM Flags

1-1029Section 175.1: -XXaggressive

1-1030Section 175.2: -XXallocClearChunks

1-1031Section 175.3: -XXallocClearChunkSize

1-1032Section 175.4: -XXcallProﬁling

1-1033Section 175.5: -XXdisableFatSpin

1-1034Section 175.6: -XXdisableGCHeuristics

1-1035Section 175.7: -XXdumpSize

1-1036Section 175.8: -XXexitOnOutOfMemory

1-1037Chapter 176: JVM Tool Interface

1-1038Section 176.1: Iterate over objects reachable from object (Heap 1.0)

1-1039Section 176.2: Get JVMTI environment

1-1040Section 176.3: Example of initialization inside of Agent_OnLoad method

1-1041Chapter 177: Java Memory Management

1-1042Section 177.1: Setting the Heap, PermGen and Stack sizes

1-1043Section 177.2: Garbage collection

1-1044Section 177.3: Memory leaks in Java

1-1045Section 177.4: Finalization

1-1046Section 177.5: Manually triggering GC

1-1047Chapter 178: Java Performance Tuning

1-1048Section 178.1: An evidence-based approach to Java performance tuning

1-1049Section 178.2: Reducing amount of Strings

1-1050Section 178.3: General approach

1-1051Chapter 179: Benchmarks

1-1052Section 179.1: Simple JMH example

1-1053Chapter 180: FileUpload to AWS

1-1054Section 180.1: Upload ﬁle to s3 bucket

1-1055Chapter 181: AppDynamics and TIBCO BusinessWorks Instrumentation for Easy Integration

1-1056Section 181.1: Example of Instrumentation of all BW Applications in a Single Step for Appdynamics

1-1057Appendix A: Installing Java (Standard Edition)

1-1058Section A.1: Setting %PATH% and %JAVA_HOME% after installing on Windows

1-1059Section A.2: Installing a Java JDK on Linux

1-1060Section A.3: Installing a Java JDK on macOS

1-1061Section A.4: Installing a Java JDK or JRE on Windows

1-1062Section A.5: Conﬁguring and switching Java versions on Linux using alternatives

1-1063Section A.6: What do I need for Java Development

1-1064Section A.7: Selecting an appropriate Java SE release

1-1065Section A.8: Java release and version naming

1-1066Section A.9: Installing Oracle Java on Linux with latest tar ﬁle

1-1067Section A.10: Post-installation checking and conﬁguration on Linux

1-1068Appendix B: Java Editions, Versions, Releases and Distributions

1-1069Section B.1: Dierences between Java SE JRE or Java SE JDK distributions

1-1070Section B.2: Java SE Versions

1-1071Section B.3: Dierences between Java EE, Java SE, Java ME and JavaFX

1-1072Appendix C: The Classpath

1-1073Section C.1: Dierent ways to specify the classpath

1-1074Section C.2: Adding all JARs in a directory to the classpath

1-1075Section C.3: Load a resource from the classpath

1-1076Section C.4: Classpath path syntax

1-1077Section C.5: Dynamic Classpath

1-1078Section C.6: Mapping classnames to pathnames

1-1079Section C.7: The bootstrap classpath

1-1080Section C.8: What the classpath means: how searches work

1-1081Appendix D: Resources (on classpath)

1-1082Section D.1: Loading default conﬁguration

1-1083Section D.2: Loading an image from a resource

1-1084Section D.3: Finding and reading resources using a classloader

1-1085Section D.4: Loading same-name resource from multiple JARs

1-1086Credits

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