Table of Contents

• Dedication
• Foreword
• Introduction
• • Prerequisites
  • Learning Java
  • Goals
  • Online documentation
  • Chapters
  • Exercises
  • Multimedia CD ROM
  • Source code
  • • Coding standards
  • Java versions
  • Seminars and mentoring
  • Errors
  • Note on the cover design
  • Acknowledgements
• 1: Introduction to objects
• • The progress of abstraction
  • An object has an interface
  • The hidden implementation
  • Reusing the implementation
  • Inheritance: reusing the interface
  • • Overriding base-class functionality
    • Is-a vs. is-like-a relationships
  • Interchangeable objects with polymorphism
  • • Dynamic binding
    • Abstract base classes and interfaces
  • Object landscapes and lifetimes
  • • Collections and iterators
    • The singly-rooted hierarchy
    • Collection libraries and support for easy collection use
    • • Downcasting vs. templates/generics
    • The housekeeping dilemma: who should clean up?
    • • Garbage collectors vs. efficiency and flexibility
  • Exception handling: dealing with errors
  • Multithreading
  • Persistence
  • Java and the Internet
  • • What is the Web?
    • • Client/Server computing
      • The Web as a giant server
    • Client-side programming
    • • Plug-ins
      • Scripting languages
      • Java
      • ActiveX
      • Security
      • Internet vs. Intranet
    • Server-side programming
    • A separate arena: applications
  • Analysis and Design
  • • Staying on course
    • Phase 0: Let’s make a plan
    • Phase 1: What are we making?
    • Phase 2: How will we build it?
    • Phase 3: Let’s build it!
    • Phase 4: Iteration
    • Plans pay off
  • Java vs. C++?
• 2: Everything is an object
• • You manipulate objects with handles
  • You must create all the objects
  • • Where storage lives
    • Special case: primitive types
    • • High-precision numbers
    • Arrays in Java
  • You never need to destroy an object
  • • Scoping
    • Scope of objects
  • Creating new data types: class
  • • Fields and methods
    • • Default values for primitive members
  • Methods, arguments and return values
  • • The argument list
  • Building a Java program
  • • Name visibility
    • Using other components
    • The static keyword
  • Your first Java program
  • Comments and embedded documentation
  • • Comment documentation
    • Syntax
    • Embedded HTML
    • @see: referring to other classes
    • Class documentation tags
    • • @version
      • @author
    • Variable documentation tags
    • Method documentation tags
    • • @param
      • @return
      • @exception
      • @deprecated
    • Documentation example
  • Coding style
  • Summary
  • Exercises
• 3: Controlling program flow
• • Using Java operators
  • • Precedence
    • Assignment
    • • Aliasing during method calls
    • Mathematical operators
    • • Unary minus and plus operators
    • Auto increment and decrement
    • Relational operators
    • • Testing object equivalence
    • Logical operators
    • • Short-circuiting
    • Bitwise operators
    • Shift operators
    • Ternary if-else operator
    • The comma operator
    • String operator +
    • Common pitfalls when using operators
    • Casting operators
    • • Literals
      • Promotion
    • Java has no “sizeof”
    • Precedence revisited
    • A compendium of operators
  • Execution control
  • • true and false
    • if-else
    • • return
    • Iteration
    • do-while
    • for
    • • The comma operator
    • break and continue
    • • The infamous “goto”
    • switch
    • • Calculation details
  • Summary
  • Exercises
• 4: Initialization and cleanup
• • Guaranteed initialization with the constructor
  • Method overloading
  • • Distinguishing overloaded methods
    • Overloading with primitives
    • Overloading on return values
    • Default constructors
    • The this keyword
    • • Calling constructors from constructors
      • The meaning of static
  • Cleanup: finalization and garbage collection
  • • What is finalize( ) for?
    • You must perform cleanup
  • Member initialization
  • • Specifying initialization
    • Constructor initialization
    • • Order of initialization
      • Static data initialization
      • Explicit static initialization
      • Non-static instance initialization
  • Array initialization
  • • Multidimensional arrays
  • Summary
  • Exercises
• 5: Hiding the implementation
• • package: the library unit
  • • Creating unique package names
    • • Automatic compilation
      • Collisions
    • A custom tool library
    • • Classpath pitfall
    • Using imports to change behavior
    • Package caveat
  • Java access specifiers
  • • “Friendly”
    • public: interface access
    • • The default package
    • private: you can’t touch that!
    • protected: “sort of friendly”
  • Interface and implementation
  • Class access
  • Summary
  • Exercises
• 6: Reusing classes
• • Composition syntax
  • Inheritance syntax
  • • Initializing the base class
    • • Constructors with arguments
      • Catching base constructor exceptions
  • Combining composition and inheritance
  • • Guaranteeing proper cleanup
    • • Order of garbage collection
    • Name hiding
  • Choosing composition vs. inheritance
  • protected
  • Incremental development
  • Upcasting
  • • Why “upcasting”?
    • • Composition vs. inheritance revisited
  • The final keyword
  • • Final data
    • • Blank finals
      • Final arguments
    • Final methods
    • Final classes
    • Final caution
  • Initialization and class loading
  • • Initialization with inheritance
  • Summary
  • Exercises
• 7: Polymorphism
• • Upcasting
  • • Why upcast?
  • The twist
  • • Method call binding
    • Producing the right behavior
    • Extensibility
  • Overriding vs. overloading
  • Abstract classes and methods
  • Interfaces
  • • “Multiple inheritance” in Java
    • Extending an interface with inheritance
    • Grouping constants
    • Initializing fields in interfaces
  • Inner classes
  • • Inner classes and upcasting
    • Inner classes in methods and scopes
    • The link to the outer class
    • static inner classes
    • Referring to the outer class object
    • Inheriting from inner classes
    • Can inner classes be overridden?
    • Inner class identifiers
    • Why inner classes: control frameworks
  • Constructors and polymorphism
  • • Order of constructor calls
    • Inheritance and finalize( )
    • Behavior of polymorphic methods inside constructors
  • Designing with inheritance
  • • Pure inheritance vs. extension
    • Downcasting and run-time type identification
  • Summary
  • Exercises
• 8: Holding your objects
• • Arrays
  • • Arrays are first-class objects
    • • Collections of primitives
    • Returning an array
  • Collections
  • • Disadvantage: unknown type
    • • Sometimes it works right anyway
      • Making a type-conscious Vector
      • Parameterized types
  • Enumerators (iterators)
  • Types of collections
  • • Vector
    • • Crashing Java
    • BitSet
    • Stack
    • Hashtable
    • • Creating “key” classes
      • Properties: a type of Hashtable
    • Enumerators revisited
  • Sorting
  • The generic collection library
  • The new collections
  • • Using Collections
    • Using Lists
    • Using Sets
    • Using Maps
    • Choosing an implementation
    • • Choosing between Lists
      • Choosing between Sets
      • Choosing between Maps
    • Unsupported operations
    • Sorting and searching
    • • Arrays
      • Comparable and Comparator
      • Lists
    • Utilities
    • • Making a Collection or Map unmodifiable
      • Synchronizing a Collection or Map
  • Summary
  • Exercises
• 9: Error handling with exceptions
• • Basic exceptions
  • • Exception arguments
  • Catching an exception
  • • The try block
    • Exception handlers
    • • Termination vs. resumption
    • The exception specification
    • Catching any exception
    • Rethrowing an exception
  • Standard Java exceptions
  • • The special case of RuntimeException
  • Creating your own exceptions
  • Exception restrictions
  • Performing cleanup with finally
  • • What’s finally for?
    • Pitfall: the lost exception
  • Constructors
  • Exception matching
  • • Exception guidelines
  • Summary
  • Exercises
• 10: The Java IO system
• • Input and output
  • • Types of InputStream
    • Types of OutputStream
  • Adding attributes and useful interfaces
  • • Reading from an InputStream with FilterInputStream
    • Writing to an OutputStream with FilterOutputStream
  • Off by itself: RandomAccessFile
  • The File class
  • • A directory lister
    • • Anonymous inner classes
      • A sorted directory listing
    • Checking for and creating directories
  • Typical uses of IO streams
  • • Input streams
    • • 1. Buffered input file
      • 2. Input from memory
      • 3. Formatted memory input
      • 4. Line numbering and file output
    • Output streams
    • • 5. Storing and recovering data
      • 6. Reading and writing random access files
    • Shorthand for file manipulation
    • • 7. File input shorthand
      • 8. Formatted file output shorthand
      • 9. Data file output shorthand
    • Reading from standard input
    • Piped streams
  • StreamTokenizer
  • • StringTokenizer
  • Java 1.1 IO streams
  • • Sources and sinks of data
    • Modifying stream behavior
    • Unchanged Classes
    • An example
    • Redirecting standard IO
  • Compression
  • • Simple compression with GZIP
    • Multi-file storage with Zip
    • The Java archive (jar) utility
  • Object serialization
  • • Finding the class
    • Controlling serialization
    • • The transient keyword
      • An alternative to Externalizable
      • Versioning
    • Using persistence
  • Summary
  • Exercises
• 11: Run-time type identification
• • The need for RTTI
  • • The Class object
    • • Class literals
    • Checking before a cast
    • • Using class literals
      • A dynamic instanceof
  • RTTI syntax
  • Reflection: run-time class information
  • • A class method extractor
  • Summary
  • Exercises
• 12: Passing and returning objects
• • Passing handles around
  • • Aliasing
  • Making local copies
  • • Pass by value
    • Cloning objects
    • Adding cloneability to a class
    • • Using a trick with protected
      • Implementing the Cloneable interface
    • Successful cloning
    • The effect of Object.clone( )
    • Cloning a composed object
    • A deep copy with Vector
    • Deep copy via serialization
    • Adding cloneability further down a hierarchy
    • Why this strange design?
  • Controlling cloneability
  • • The copy-constructor
    • • Why does it work in C++ and not Java?
  • Read-only classes
  • • Creating read-only classes
    • The drawback to immutability
    • Immutable Strings
    • • Implicit constants
      • Overloading ‘+’ and the StringBuffer
    • The String and StringBuffer classes
    • Strings are special
  • Summary
  • Exercises
• 13: Creating windows and applets
• • Why use the AWT?
  • The basic applet
  • • Testing applets
    • A more graphical example
    • Demonstrating the framework methods
  • Making a button
  • Capturing an event
  • Text fields
  • Text areas
  • Labels
  • Check boxes
  • Radio buttons
  • Drop-down lists
  • List boxes
  • • handleEvent( )
  • Controlling layout
  • • FlowLayout
    • BorderLayout
    • GridLayout
    • CardLayout
    • • Combining layouts
    • GridBagLayout
  • Alternatives to action
  • Applet restrictions
  • • Applet advantages
  • Windowed applications
  • • Menus
    • Dialog boxes
    • • File dialogs
  • The new AWT
  • • The new event model
    • Event and listener types
    • • Using listener adapters for simplicity
    • Making windows and applets with the Java 1.1 AWT
    • • Making the window listener an anonymous class
      • Packaging the applet into a JAR file
    • Revisiting the earlier examples
    • • Text fields
      • Text areas
      • Check boxes and radio buttons
      • Drop-down lists
      • Lists
      • Menus
      • Dialog boxes
      • File dialogs
    • Binding events dynamically
    • Separating business logic from UI logic
    • Recommended coding approaches
    • • Baseline: the good way to do it
      • Implementing the main class as a listener
      • Mixing the approaches
      • Inheriting a component
      • Ugly component inheritance
  • Java 1.1 UI APIs
  • • Desktop colors
    • Printing
    • • Printing text
      • Printing graphics
      • Running Frames within applets
    • The clipboard
  • Visual programming and Beans
  • • What is a Bean?
    • Extracting BeanInfo with the Introspector
    • A more sophisticated Bean
    • Packaging a Bean
    • More complex Bean support
    • More to Beans
  • Introduction to Swing
  • • Benefits of Swing
    • Easy conversion
    • A display framework
    • Tool tips
    • Borders
    • Buttons
    • Button groups
    • Icons
    • Menus
    • Popup menus
    • List boxes and combo boxes
    • Sliders and progress bars
    • Trees
    • Tables
    • Tabbed Panes
    • The Swing message box
    • More to Swing
  • Summary
  • Exercises
• 14: Multiple threads
• • Responsive user interfaces
  • • Inheriting from Thread
    • Threading for a responsive interface
    • • Improving the code with an inner class
    • Combining the thread with the main class
    • Making many threads
    • Daemon threads
  • Sharing limited resources
  • • Improperly accessing resources
    • How Java shares resources
    • • Synchronizing the counters
      • Synchronized efficiency
    • Java Beans revisited
  • Blocking
  • • Becoming blocked
    • • Sleeping
      • Suspending and resuming
      • Wait and notify
      • Blocking on IO
      • Testing
    • Deadlock
    • • The deprecation of stop( ), suspend( ), resume( ), and destroy( ) in Java 1.2
  • Priorities
  • • Thread groups
    • • Controlling thread groups
  • Runnable revisited
  • • Too many threads
  • Summary
  • Exercises
• 15: Network programming
• • Identifying a machine
  • • Servers and clients
    • • Testing programs without a network
    • Port: a unique place within the machine
  • Sockets
  • • A simple server and client
  • Serving multiple clients
  • Datagrams
  • A Web application
  • • The server application
    • • The C program
      • The Java program
    • The NameSender applet
    • • The Web page
    • Problems with this approach
  • Connecting Java to CGI
  • • Encoding data for CGI
    • The applet
    • • Displaying a Web page from within an applet
    • The CGI program in C++
    • What about POST?
  • Connecting to databases with JDBC
  • • Getting the example to work
    • • Step 1: Find the JDBC Driver
      • Step 2: Configure the database
      • Step 3: Test the configuration
      • Step 4: Generate your SQL query
      • Step 5: Modify and paste in your query
    • A GUI version of the lookup program
    • Why the JDBC API seems so complex
  • Remote methods
  • • Remote interfaces
    • Implementing the remote interface
    • • Setting up the registry
    • Creating stubs and skeletons
    • Using the remote object
    • Alternatives to RMI
  • Summary
  • Exercises
• 16: Design patterns
• • The pattern concept
  • • The singleton
    • Classifying patterns
  • The observer pattern
  • Simulating the trash recycler
  • Improving the design
  • • “Make more objects”
    • A pattern for prototyping creation
    • • Trash subclasses
      • Parsing Trash from an external file
      • Recycling with prototyping
  • Abstracting usage
  • Multiple dispatching
  • • Implementing the double dispatch
  • The “visitor” pattern
  • • More coupling?
  • RTTI considered harmful?
  • Summary
  • Exercises
• 17: Projects
• • Text processing
  • • Extracting code listings
    • • Building a packed file
      • Extracting from a packed file
      • Accessing and writing the listings
      • Containing the entire collection of listings
      • The main program
    • Checking capitalization style
  • A method lookup tool
  • Complexity theory
  • Summary
  • Exercises
• A: Using non-Java code
• • The Java Native Interface
  • • Calling a native method
    • • The C header file generator: javah
      • Name mangling and function signatures
      • Implementing your DLL
    • Accessing JNI functions: The JNIEnv argument
    • • Accessing Java Strings
    • Passing and using Java objects
    • JNI and Java exceptions
    • JNI and threading
    • Using a pre-existing code base
  • The Microsoft way
  • J/Direct
  • • The @dll.import directive
    • • Aliasing and linking by ordinal
      • Applying @dll.import to the entire class
    • The com.ms.win32 package
    • Marshaling
    • Writing callback functions
    • Other J/Direct features
  • Raw Native Interface (RNI)
  • • RNI Summary
  • Java/COM integration
  • • COM Fundamentals
    • • GUIDs and the Registry
      • Type Libraries
      • Function return codes in COM: HRESULT
    • MS Java/COM Integration
    • Developing COM servers in Java
    • Developing COM clients in Java
    • • The com.ms.com package
    • ActiveX/Beans integration
    • A note about native methods and applets
  • CORBA
  • • CORBA Fundamentals
    • • CORBA Interface Definition Language (IDL)
      • The naming service
    • An example
    • • Writing the IDL source
      • Creating stubs and skeletons
      • Implementing the server and the client
      • Some CORBA services
      • Activating the name service process
      • Activating the server and the client
    • Java Applets and CORBA
    • CORBA vs. RMI
  • Summary
• B: Comparing C++ and Java
• C: Java programming guidelines
• D: Performance
• • Basic approach
  • Locating the bottleneck
  • • 1. Install your own instrumentation
    • 2. JDK profiling [2]
    • 3. Special tools
    • Tips for measuring performance
  • Speedup techniques
  • • Generic approaches
    • Language dependent approaches
    • • General modifications
    • Specific situations
    • • Other suggestions
  • References
  • • Performance tools
    • Web sites
    • Articles
    • Java specific books
    • General books
• E: A bit about garbage collection
• F: Recommended reading
• Index

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