The Java Language Specification, Third Edition

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vi Text printed on recycled and acid-free paper ISBN 0-321-24678-0 1 2 3 4 5 6 7 8 9-MA-99989796 First printing, May 2005 DRAFT
“When I use a word,” Humpty Dumpty said, in rather a scornful tone, “it means just what I choose it to mean—neither more nor less.” “<strong>The</strong> question is,” said Alice, “whether you can make words mean so many different things.” “<strong>The</strong> question is,” said Humpty Dumpty, “which is to be master—that’s all.” —Lewis Carroll, Through the Looking Glass DRAFT
Page 1 and 2: The Java Language Specification Th
Page 3 and 4: The Java Language Specification Th
Page 5: Copyright © 1996-2005 Sun Microsys
Page 9 and 10: Preface XXIII Preface to the Second
Page 11 and 12: 5.4 String Conversion 101 5.5 Casti
Page 13 and 14: 8.2.1.3 Inheritance with private 19
Page 15 and 16: 10 Arrays 287 10.1 Array Types 288
Page 17 and 18: 14 Blocks and Statements 359 14.1 N
Page 19 and 20: 15.12.4.4 Locate Method to Invoke 4
Page 21 and 22: 17.4.2 Actions 558 17.4.3 Programs
Page 23 and 24: Preface THE Java programming langua
Page 25 and 26: PREFACE was invaluable to us during
Page 27 and 28: Preface to the Second Edition ... t
Page 29 and 30: PREFACE TO THE SECOND EDITION Trici
Page 31 and 32: Preface to the Third Edition This e
Page 33 and 34: PREFACE TO THE THIRD EDITION Joe Da
Page 35 and 36: 1.0 CHAPTER1 Introduction If I have
Page 37 and 38: INTRODUCTION Introduction 1 declare
Page 39 and 40: INTRODUCTION Example Programs 1.1 B
Page 41 and 42: INTRODUCTION References 1.4 Goldber
Page 43 and 44: CHAPTER2 Grammars Grammar, which kn
Page 45 and 46: GRAMMARS Grammar Notation 2.4 actua
Page 47 and 48: CHAPTER3 Lexical Structure Lexicogr
Page 49 and 50: LEXICAL STRUCTURE Unicode Escapes 3
Page 51 and 52: LEXICAL STRUCTURE Input Elements an
Page 53 and 54: LEXICAL STRUCTURE Identifiers 3.8 E
Page 55 and 56: LEXICAL STRUCTURE Literals 3.10 3.9
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LEXICAL STRUCTURE Integer Literals
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LEXICAL STRUCTURE Floating-Point Li
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LEXICAL STRUCTURE Character Literal
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LEXICAL STRUCTURE String Literals 3
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LEXICAL STRUCTURE Operators 3.12 3.
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CHAPTER4 Types, Values, and Variabl
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TYPES, VALUES, AND VARIABLES Integr
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TYPES, VALUES, AND VARIABLES Floati
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TYPES, VALUES, AND VARIABLES The bo
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TYPES, VALUES, AND VARIABLES Object
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TYPES, VALUES, AND VARIABLES The Cl
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TYPES, VALUES, AND VARIABLES Type V
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TYPES, VALUES, AND VARIABLES Parame
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TYPES, VALUES, AND VARIABLES Type A
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TYPES, VALUES, AND VARIABLES Member
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TYPES, VALUES, AND VARIABLES Raw Ty
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TYPES, VALUES, AND VARIABLES Subtyp
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TYPES, VALUES, AND VARIABLES Where
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TYPES, VALUES, AND VARIABLES Variab
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TYPES, VALUES, AND VARIABLES Kinds
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TYPES, VALUES, AND VARIABLES Initia
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TYPES, VALUES, AND VARIABLES Types,
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TYPES, VALUES, AND VARIABLES Types,
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CHAPTER5 Conversions and Promotions
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CONVERSIONS AND PROMOTIONS Conversi
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CONVERSIONS AND PROMOTIONS Widening
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CONVERSIONS AND PROMOTIONS Narrowin
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CONVERSIONS AND PROMOTIONS Narrowin
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CONVERSIONS AND PROMOTIONS Boxing C
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CONVERSIONS AND PROMOTIONS Capture
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CONVERSIONS AND PROMOTIONS Capture
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CONVERSIONS AND PROMOTIONS Assignme
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CONVERSIONS AND PROMOTIONS Method I
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CONVERSIONS AND PROMOTIONS Casting
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CONVERSIONS AND PROMOTIONS Unary Nu
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CONVERSIONS AND PROMOTIONS Binary N
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CHAPTER6 Names The Tao that can be
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NAMES Names and Identifiers 6.2 ❖
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NAMES Scope of a Declaration 6.3 in
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NAMES Shadowing Declarations 6.3.1
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NAMES Shadowing Declarations 6.3.1
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NAMES The Members of a Class Type 6
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NAMES The Members of an Array Type
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NAMES Syntactic Classification of a
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NAMES Reclassification of Contextua
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NAMES Meaning of Package Names 6.5.
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NAMES Meaning of Type Names 6.5.5 a
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NAMES Meaning of Expression Names 6
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NAMES Meaning of Method Names 6.5.7
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NAMES Details on protected Access 6
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NAMES Example: Access to public and
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NAMES Example: protected Fields, Me
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NAMES Fully Qualified Names and Can
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NAMES Class and Interface Type Name
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NAMES Method Names 6.8.4 DISCUSSION
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NAMES Local Variable and Parameter
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CHAPTER7 Packages Good things come
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PACKAGES Storing Packages in a File
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PACKAGES Compilation Units 7.3 7.2.
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PACKAGES Unnamed Packages 7.4.2 on
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PACKAGES Single-Type-Import Declara
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PACKAGES Type-Import-on-Demand Decl
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PACKAGES A Strange Example 7.5.6 7.
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PACKAGES Top Level Type Declaration
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PACKAGES Unique Package Names 7.7 t
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PACKAGES Unique Package Names 7.7 o
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CHAPTER8 Classes Origins: A Short E
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CLASSES Class Modifiers 8.1.1 8.1 C
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CLASSES Class Modifiers 8.1.1 class
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CLASSES Generic Classes and Type Pa
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CLASSES Inner Classes and Enclosing
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CLASSES Inner Classes and Enclosing
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CLASSES Superclasses and Subclasses
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CLASSES Superinterfaces 8.1.5 resul
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CLASSES Class Body and Member Decla
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CLASSES Class Members 8.2 Construct
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CLASSES Examples of Inheritance 8.2
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CLASSES Examples of Inheritance 8.2
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CLASSES Field Modifiers 8.3.1 If a
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CLASSES Field Modifiers 8.3.1 of ac
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CLASSES Initialization of Fields 8.
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CLASSES Initialization of Fields 8.
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CLASSES Examples of Field Declarati
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CLASSES Examples of Field Declarati
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CLASSES Method Declarations 8.4 fie
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CLASSES Formal Parameters 8.4.1 of
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CLASSES Method Signature 8.4.2 Two
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CLASSES Method Modifiers 8.4.3 an i
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CLASSES Method Modifiers 8.4.3 resp
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CLASSES Method Modifiers 8.4.3 Thes
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CLASSES Method Throws 8.4.6 • If
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CLASSES Method Body 8.4.7 Object do
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CLASSES Inheritance, Overriding, an
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CLASSES Inheritance, Overriding, an
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CLASSES Overloading 8.4.9 DISCUSSIO
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CLASSES Examples of Method Declarat
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CLASSES Member Type Declarations 8.
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CLASSES Static Initializers 8.7 aga
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CLASSES Constructor Modifiers 8.8.3
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CLASSES Constructor Body 8.8.7 clas
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CLASSES Constructor Body 8.8.7 •
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CLASSES Default Constructor 8.8.9 8
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CLASSES Enums 8.9 8.9 Enums An enum
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CLASSES Enums 8.9 DISCUSSION This i
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CLASSES Enums 8.9 Note that the exa
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CLASSES Enums 8.9 DIME: 10¢ SILVER
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CLASSES Enums 8.9 public static voi
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CHAPTER9 Interfaces My apple trees
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INTERFACES Superinterfaces and Subi
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INTERFACES Interface Members 9.2 9.
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INTERFACES Examples of Field Declar
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INTERFACES Inheritance and Overridi
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INTERFACES Examples of Abstract Met
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INTERFACES Annotation Types 9.6 DIS
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INTERFACES Predefined Annotation Ty
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INTERFACES Predefined Annotation Ty
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INTERFACES Annotations 9.7 • The
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INTERFACES Annotations 9.7 TypeName
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INTERFACES Annotations 9.7 The seco
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CHAPTER10 Arrays Even Solomon in al
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ARRAYS Array Access 10.4 Here are s
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ARRAYS Array Initializers 10.6 Arra
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ARRAYS Class Objects for Arrays 10.
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ARRAYS Array Store Exception 10.10
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CHAPTER11 Exceptions If anything ca
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EXCEPTIONS Exception Analysis of Ex
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EXCEPTIONS Why Runtime Exceptions a
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EXCEPTIONS Handling Asynchronous Ex
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EXCEPTIONS An Example of Exceptions
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EXCEPTIONS Virtual Machine Errors 1
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CHAPTER12 Execution We must all han
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EXECUTION Initialize Test: Execute
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EXECUTION The Loading Process 12.2.
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EXECUTION Resolution of Symbolic Re
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EXECUTION When Initialization Occur
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EXECUTION Detailed Initialization P
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EXECUTION Initialization: Implicati
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EXECUTION Creation of New Class Ins
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EXECUTION Finalization of Class Ins
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EXECUTION Implementing Finalization
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EXECUTION Finalizer Invocations are
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EXECUTION Program Exit 12.8 ers. A
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CHAPTER13 Binary Compatibility Desp
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BINARY COMPATIBILITY The Form of a
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BINARY COMPATIBILITY The Form of a
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BINARY COMPATIBILITY What Binary Co
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BINARY COMPATIBILITY Superclasses a
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BINARY COMPATIBILITY Class Body and
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BINARY COMPATIBILITY Field Declarat
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BINARY COMPATIBILITY final Fields a
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BINARY COMPATIBILITY static Fields
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BINARY COMPATIBILITY Method and Con
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BINARY COMPATIBILITY final Methods
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BINARY COMPATIBILITY Method and Con
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BINARY COMPATIBILITY Interface Form
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CHAPTER14 Blocks and Statements He
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BLOCKS AND STATEMENTS Local Class D
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BLOCKS AND STATEMENTS Local Variabl
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BLOCKS AND STATEMENTS Scope of Loca
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BLOCKS AND STATEMENTS Execution of
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BLOCKS AND STATEMENTS Statements 14
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BLOCKS AND STATEMENTS Expression St
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BLOCKS AND STATEMENTS The assert St
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BLOCKS AND STATEMENTS The assert St
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BLOCKS AND STATEMENTS The switch St
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BLOCKS AND STATEMENTS The switch St
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BLOCKS AND STATEMENTS Abrupt Comple
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BLOCKS AND STATEMENTS Example of do
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BLOCKS AND STATEMENTS The basic for
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BLOCKS AND STATEMENTS The enhanced
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BLOCKS AND STATEMENTS The break Sta
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BLOCKS AND STATEMENTS The continue
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BLOCKS AND STATEMENTS The throw Sta
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BLOCKS AND STATEMENTS The synchroni
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BLOCKS AND STATEMENTS The try state
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BLOCKS AND STATEMENTS Unreachable S
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CHAPTER15 Expressions When you can
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EXPRESSIONS Expressions and Run-Tim
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EXPRESSIONS Normal and Abrupt Compl
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EXPRESSIONS Evaluate Left-Hand Oper
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EXPRESSIONS Evaluation Respects Par
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EXPRESSIONS Evaluation Order for Ot
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EXPRESSIONS this 15.8.3 ing-point l
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EXPRESSIONS Class Instance Creation
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EXPRESSIONS Determining Enclosing I
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EXPRESSIONS Choosing the Constructo
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EXPRESSIONS Anonymous Class Declara
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EXPRESSIONS Array Creation Expressi
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EXPRESSIONS Example: Array Creation
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EXPRESSIONS Field Access Using a Pr
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EXPRESSIONS Field Access Using a Pr
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EXPRESSIONS Accessing Superclass Me
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EXPRESSIONS Compile-Time Step 1: De
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EXPRESSIONS Compile-Time Step 3: Is
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EXPRESSIONS Runtime Evaluation of M
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EXPRESSIONS Examples: Array Access
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EXPRESSIONS Postfix Increment Opera
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EXPRESSIONS Prefix Increment Operat
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EXPRESSIONS Unary Minus Operator -
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EXPRESSIONS Multiplicative Operator
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EXPRESSIONS Division Operator / 15.
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EXPRESSIONS Remainder Operator % 15
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EXPRESSIONS String Concatenation Op
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EXPRESSIONS String Concatenation Op
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EXPRESSIONS Additive Operators (+ a
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EXPRESSIONS Numerical Comparison Op
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EXPRESSIONS Equality Operators 15.2
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EXPRESSIONS Reference Equality Oper
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EXPRESSIONS Conditional-Or Operator
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EXPRESSIONS Conditional Operator ?
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EXPRESSIONS Simple Assignment Opera
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EXPRESSIONS Compound Assignment Ope
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EXPRESSIONS Constant Expression 15.
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CHAPTER16 Definite Assignment All t
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DEFINITE ASSIGNMENT Definite Assign
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DEFINITE ASSIGNMENT The Boolean Ope
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DEFINITE ASSIGNMENT Assignment Expr
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DEFINITE ASSIGNMENT Other Expressio
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DEFINITE ASSIGNMENT Local Variable
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DEFINITE ASSIGNMENT switch Statemen
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DEFINITE ASSIGNMENT for Statements
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DEFINITE ASSIGNMENT try Statements
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CHAPTER17 Threads and Locks And oft
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THREADS AND LOCKS Incorrectly Synch
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THREADS AND LOCKS Memory Model 17.4
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THREADS AND LOCKS Actions 17.4.2
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THREADS AND LOCKS Happens-before Or
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THREADS AND LOCKS Executions 17.4.6
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THREADS AND LOCKS Executions and Ca
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THREADS AND LOCKS Observable Behavi
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THREADS AND LOCKS Final Field Seman
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THREADS AND LOCKS Semantics of Fina
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THREADS AND LOCKS Subsequent Modifi
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THREADS AND LOCKS Non-atomic Treatm
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THREADS AND LOCKS Notification 17.8
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THREADS AND LOCKS Sleep and Yield 1
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CHAPTER18 Syntax Is there grammar i
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SYNTAX The Grammar of the Java Prog
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A abrupt completion See completion,
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definite assignment before, 548 det
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See also numbers literals, term def
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See local class member See member c
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See also hiding; obscuring; scope;
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in assignment conversion context, 9
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of blank final class variables, 199
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interface, multiply inherited, 266
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division, evaluation, 493 equality
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easons why constructors cannot be,
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identity conversion in assignment c
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order, 428 expressions as statement
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L labeled statements identifiers in
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term definition, 122 type, 44 memor
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class, 175 constructor, 241 declara
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conversions of and to See conversio
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importing all public types from a,
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Q superclasses, accessing instances
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internal symbolic reference table,
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declaring class methods with, 216 h
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applicable by subtyping, 445 applic
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unchecked, 301 executed, 409 exit o
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precision, loss of, 81 preparation,
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termination and virtual machine exi
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members and constructors, 55 reifia
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of binary representation, of classe
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Colophon CAMERA-READY electronic co
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