Learning Java with JBuilder.pdf

Learning Java ® with JBuilder ™

VERSION 4

Borland ®

JBuilder ™

Inprise Corporation

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Contents

Chapter 1

Introduction 1-1

Contacting Borland developer support . . . . . 1-2

Online resources . . . . . . . . . . . . . . . . . . 1-2

World Wide Web . . . . . . . . . . . . . . . . 1-2

Borland newsgroups . . . . . . . . . . . . . . 1-3

Usenet newsgroups . . . . . . . . . . . . . . 1-3

Documentation conventions . . . . . . . . . . . 1-3

Java language support . . . . . . . . . . . . . . . 3-6

Learning more about JBuilder . . . . . . . . . . . 3-7

The JBuilder documentation set . . . . . . . . 3-7

Learning more about Java . . . . . . . . . . . . . 3-8

Chapter 4

Using the editor 4-1

Completing code with CodeInsight. . . . . . . . 4-3

Using code templates . . . . . . . . . . . . . . . . 4-4

Keymaps for editor emulations . . . . . . . . . . 4-5

Cursor movement . . . . . . . . . . . . . . . . 4-5

Selection . . . . . . . . . . . . . . . . . . . . . 4-7

Editing text . . . . . . . . . . . . . . . . . . . . 4-8

Clipboard. . . . . . . . . . . . . . . . . . . . 4-10

Search and replace. . . . . . . . . . . . . . . 4-10

Buffers and Files . . . . . . . . . . . . . . . . 4-11

Compile and Debug . . . . . . . . . . . . . 4-11

CodeInsight . . . . . . . . . . . . . . . . . . 4-12

Code Templates . . . . . . . . . . . . . . . . 4-12

View and Help . . . . . . . . . . . . . . . . . 4-12

Part I

JBuilder Quick Start

Chapter 2

What’s new in JBuilder 4 2-1

Web Development . . . . . . . . . . . . . . . . . 2-1

JavaServer Pages and servlet support . . . . 2-2

XML support . . . . . . . . . . . . . . . . . . 2-2

InternetBeans Express . . . . . . . . . . . . . 2-2

Enterprise JavaBeans . . . . . . . . . . . . . . . 2-3

Application server support . . . . . . . . . . . . 2-4

Team development. . . . . . . . . . . . . . . . . 2-4

Version tracking and control . . . . . . . . . 2-4

OpenTools API . . . . . . . . . . . . . . . . . . . 2-5

User Interface changes . . . . . . . . . . . . . . 2-5

JBuilder IDE. . . . . . . . . . . . . . . . . . . 2-5

Wizards . . . . . . . . . . . . . . . . . . . . . 2-6

Editor . . . . . . . . . . . . . . . . . . . . . . 2-7

Keymaps . . . . . . . . . . . . . . . . . . . 2-7

Search and Save . . . . . . . . . . . . . . . 2-8

Running and Debugging . . . . . . . . . . . . . 2-8

Database tools . . . . . . . . . . . . . . . . . . . 2-9

JDataStore . . . . . . . . . . . . . . . . . . . . 2-9

JDBC Explorer improvements . . . . . . . . 2-10

Using JBuilder’s online help . . . . . . . . . . . 2-10

How to get Help . . . . . . . . . . . . . . . . 2-10

Chapter 5

Automating application

development 5-1

Using wizards . . . . . . . . . . . . . . . . . . . . 5-1

Using the object gallery . . . . . . . . . . . . . . 5-2

Additional JBuilder tools. . . . . . . . . . . . . . 5-3

Working with projects . . . . . . . . . . . . . . . 5-4

Saving projects . . . . . . . . . . . . . . . . . . 5-4

Using the Project wizard . . . . . . . . . . . . 5-5

Project wizard: Step 1 . . . . . . . . . . . . 5-5

Project Wizard: Step 2 . . . . . . . . . . . . 5-6

Project Wizard: Step 3 . . . . . . . . . . . . 5-7

Displaying project files . . . . . . . . . . . . . 5-8

Setting project properties . . . . . . . . . . . . 5-9

Managing projects . . . . . . . . . . . . . . . 5-10

Opening projects . . . . . . . . . . . . . . 5-10

Adding and removing files . . . . . . . . 5-10

Saving and closing projects . . . . . . . . 5-11

Renaming projects and files . . . . . . . 5-11

Working with multiple projects . . . . . 5-12

Creating JavaBeans . . . . . . . . . . . . . . . . 5-13

Working with applets. . . . . . . . . . . . . . . 5-14

Using the Applet wizard . . . . . . . . . . . 5-14

Chapter 3

Introducing JBuilder 3-1

What is JBuilder?. . . . . . . . . . . . . . . . . . 3-1

Introducing the AppBrowser . . . . . . . . . . . 3-2

AppBrowser design view . . . . . . . . . . . 3-4

AppBrowser message pane in

debugger view . . . . . . . . . . . . . . . . 3-5

Navigating in the AppBrowser . . . . . . . . 3-5

Chapter 6

Building a user interface 6-1

Using the UI designer . . . . . . . . . . . . . . . 6-2

Viewing a file . . . . . . . . . . . . . . . . . . 6-3

Adding and manipulating components . . . 6-3

Designing menus . . . . . . . . . . . . . . . . . 6-3

Setting component properties and events . . . . 6-4

Opening the Inspector . . . . . . . . . . . . . 6-5

Designing layouts with layout managers . . . . 6-5

Keywords . . . . . . . . . . . . . . . . . . . . 9-5

Statements . . . . . . . . . . . . . . . . . . . . 9-6

Code blocks . . . . . . . . . . . . . . . . . . . 9-6

Comments . . . . . . . . . . . . . . . . . . . . 9-7

Expressions. . . . . . . . . . . . . . . . . . . . 9-8

Operators . . . . . . . . . . . . . . . . . . . . . 9-8

Arithmetic operators . . . . . . . . . . . . 9-9

Logical operators. . . . . . . . . . . . . . 9-10

Comparison operators . . . . . . . . . . 9-10

Assignment operators . . . . . . . . . . . 9-11

Bitwise operators . . . . . . . . . . . . . 9-12

A special operator: The ?: operator . . . 9-12

Java’s data types . . . . . . . . . . . . . . . . . 9-13

Variables . . . . . . . . . . . . . . . . . . . . 9-13

Built-in data types . . . . . . . . . . . . . . . 9-14

Numeric data types . . . . . . . . . . . . 9-14

Boolean data types. . . . . . . . . . . . . 9-14

Character data types. . . . . . . . . . . . 9-15

Composite data types . . . . . . . . . . . . . 9-15

Arrays . . . . . . . . . . . . . . . . . . . . 9-15

Strings . . . . . . . . . . . . . . . . . . . . 9-16

Type casting . . . . . . . . . . . . . . . . . . 9-17

Implicit casting . . . . . . . . . . . . . . . 9-18

Scope rules . . . . . . . . . . . . . . . . . . . 9-18

Flow control structures . . . . . . . . . . . . . . 9-19

Loops . . . . . . . . . . . . . . . . . . . . . . 9-19

The while loop . . . . . . . . . . . . . . . 9-19

The do loop . . . . . . . . . . . . . . . . . 9-20

The for loop. . . . . . . . . . . . . . . . . 9-20

Loop control statements . . . . . . . . . . . 9-21

The break statement . . . . . . . . . . . . 9-21

The continue statement . . . . . . . . . . 9-22

Conditional statements . . . . . . . . . . . . 9-22

The if-else statement. . . . . . . . . . . . 9-22

The switch statement . . . . . . . . . . . 9-23

Summary. . . . . . . . . . . . . . . . . . . . . . 9-24

Chapter 7

Compiling and running

Java programs 7-1

Compiling Java programs. . . . . . . . . . . . . 7-1

Running Java programs . . . . . . . . . . . . . . 7-2

Debugging Java programs . . . . . . . . . . . . 7-3

Debugging . . . . . . . . . . . . . . . . . . . 7-4

Deploying Java programs . . . . . . . . . . . . . 7-5

Using the Archive Builder . . . . . . . . . . . 7-5

Deploying CORBA applications . . . . . . . 7-6

Deploying web-based applications. . . . . . 7-7

Running deployed programs . . . . . . . . . 7-7

Using command line tools . . . . . . . . . . . . 7-8

Chapter 8

Building distributed applications 8-1

Team development. . . . . . . . . . . . . . . . . 8-1

Java technologies. . . . . . . . . . . . . . . . . . 8-2

Building database applications . . . . . . . . . . 8-4

Developing international applications . . . . . 8-5

Internationalization features in JBuilder . . . 8-6

Part II

Getting Started with Java

Chapter 9

Java language basics 9-1

Java syntax . . . . . . . . . . . . . . . . . . . . . 9-1

Identifiers . . . . . . . . . . . . . . . . . . . . 9-2

Literals . . . . . . . . . . . . . . . . . . . . . . 9-3

Integer literals . . . . . . . . . . . . . . . . 9-3

Floating-point literals . . . . . . . . . . . 9-4

Boolean literals . . . . . . . . . . . . . . . 9-4

Character literals . . . . . . . . . . . . . . 9-4

String literals . . . . . . . . . . . . . . . . 9-5

Chapter 10

Object-oriented programming

in Java 10-1

Introduction to OOP . . . . . . . . . . . . . . . 10-1

Classes . . . . . . . . . . . . . . . . . . . . . . . 10-2

Declaring and instantiating classes . . . . . 10-2

Data members . . . . . . . . . . . . . . . . . 10-3

Class methods . . . . . . . . . . . . . . . . . 10-3

Constructors and finalizers. . . . . . . . . . 10-4

Case study: A simple OOP example . . . . . 10-4

Class inheritance . . . . . . . . . . . . . . . . 10-6

Using this and super . . . . . . . . . . . . 10-8

Access modifiers . . . . . . . . . . . . . . . . 10-9

Access from within class’s package . . . . 10-9

Access outside of a class’s package . . . . 10-9

Accessor methods . . . . . . . . . . . . . . 10-10

Abstract classes . . . . . . . . . . . . . . . . 10-11

Polymorphism . . . . . . . . . . . . . . . . . . 10-13

Method overloading . . . . . . . . . . . . . 10-13

Using interfaces. . . . . . . . . . . . . . . . 10-13

Java packages. . . . . . . . . . . . . . . . . . . 10-17

The import statement . . . . . . . . . . . . 10-17

Declaring packages. . . . . . . . . . . . . . 10-18

Project options related to packages. . . . . 10-19

Summary . . . . . . . . . . . . . . . . . . . . . 10-19

The Thread API . . . . . . . . . . . . . . . . . . 12-5

Constructors . . . . . . . . . . . . . . . . . . 12-5

The start() method. . . . . . . . . . . . . . . 12-6

The sleep() method . . . . . . . . . . . . . . 12-6

The yield() method . . . . . . . . . . . . . . 12-6

The join() method . . . . . . . . . . . . . . . 12-6

A thread’s lifecycle . . . . . . . . . . . . . . . . 12-7

Making your code thread-safe. . . . . . . . . . 12-7

The synchronized keyword . . . . . . . . . 12-7

Monitors . . . . . . . . . . . . . . . . . . . . 12-8

Summary. . . . . . . . . . . . . . . . . . . . . . 12-9

Chapter 13

Serialization 13-1

Overview . . . . . . . . . . . . . . . . . . . . . 13-1

Why serialize? . . . . . . . . . . . . . . . . . . . 13-1

Serialization in JDK 1.1 . . . . . . . . . . . . . . 13-2

The Serializable interface . . . . . . . . . . . 13-2

Using output streams. . . . . . . . . . . . . . . 13-3

ObjectOutputStream methods . . . . . . . . 13-4

Using input streams . . . . . . . . . . . . . . . 13-4

ObjectInputStream methods . . . . . . . . . 13-6

Writing and reading object streams . . . . . . . 13-6

Summary. . . . . . . . . . . . . . . . . . . . . . 13-6

Chapter 11

The Java class libraries 11-1

Introduction . . . . . . . . . . . . . . . . . . . . 11-1

The Language package . . . . . . . . . . . . . . 11-2

The Object class . . . . . . . . . . . . . . . . 11-2

Type wrapper classes . . . . . . . . . . . . . 11-2

The Math class . . . . . . . . . . . . . . . . . 11-3

The String class . . . . . . . . . . . . . . . . . 11-4

The StringBuffer class . . . . . . . . . . . . . 11-5

The System class . . . . . . . . . . . . . . . . 11-6

The Utilities package . . . . . . . . . . . . . . . 11-6

The Enumeration interface . . . . . . . . . . 11-7

The Vector class . . . . . . . . . . . . . . . . . 11-7

The I/O package . . . . . . . . . . . . . . . . . . 11-9

Input stream classes . . . . . . . . . . . . . . 11-9

Output Stream classes . . . . . . . . . . . . 11-11

File classes. . . . . . . . . . . . . . . . . . . 11-12

The StreamTokenizer class . . . . . . . . . 11-13

Summary . . . . . . . . . . . . . . . . . . . . . 11-13

Chapter 14

Java Virtual Machine security 14-1

Overview . . . . . . . . . . . . . . . . . . . . . 14-1

Why is the Java VM necessary? . . . . . . . 14-2

What are the main roles of the JVM? . . . . 14-2

Java VM security . . . . . . . . . . . . . . . . . 14-3

The security model . . . . . . . . . . . . . . 14-3

The Java verifier . . . . . . . . . . . . . . 14-3

The Security Manager . . . . . . . . . . . 14-4

The class loader . . . . . . . . . . . . . . 14-5

Java’s safety as a language . . . . . . . . 14-6

What about Just-In-Time compilers? . . . . 14-6

Summary. . . . . . . . . . . . . . . . . . . . . . 14-7

Chapter 12

Threading techniques 12-1

Overview . . . . . . . . . . . . . . . . . . . . . . 12-1

Why are threads useful? . . . . . . . . . . . . 12-1

Why haven’t I heard of threads before? . . . 12-2

Creating a thread. . . . . . . . . . . . . . . . . . 12-2

Subclassing the Thread class . . . . . . . . . 12-2

Example: Implementing

countingThread . . . . . . . . . . . . . . 12-3

Implementing the Runnable interface . . . . 12-4

Chapter 15

Working with the native code

interface 15-1

Overview . . . . . . . . . . . . . . . . . . . . . 15-1

Using the JNI. . . . . . . . . . . . . . . . . . 15-1

Using the native keyword . . . . . . . . . . 15-2

Using the javah tool . . . . . . . . . . . . . . 15-3

Summary . . . . . . . . . . . . . . . . . . . . . 15-3

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