This document introduces the Cocoa application environment using the Java language and teaches you how to leverage Apple’s development tools to build robust, object-oriented applications. Cocoa provides the best way to build modern, multimedia-rich, object-oriented applications for consumers and enterprise customers alike. This document assumes you are familiar with Java programming but does not assume you have previous experience with Cocoa or Xcode Tools.

This document is intended for Java programmers interested in developing Cocoa applications. Keep in mind, however, that Java is not Cocoa’s native language. To develop Cocoa applications that you intend to release to end users, you must use Objective-C. No Java interfaces for new Cocoa features will be added to Mac OS X versions after 10.4. Therefore, features added to Cocoa in subsequent versions ac OS X will not be available to Cocoa applications developed using Java.

This document shows how to build Currency Converter, an application that converts a dollar amount to an amount in another currency, given the rate of that currency relative to the dollar. The main window of the finished application is shown in Figure I-1.

Contents
Introduction
Introduction to Cocoa Tutorial for Java Programmers

Organization of This Document
See Also

Chapter 1
Creating the Currency Converter Project and User Interface

Creating the Currency Converter Project
Open Xcode
Choose the New Project Command
Choose a Project Type

Creating the Currency Converter User Interface

What Is a Nib File?
Open the Main Nib File
Windows in Cocoa
Resize the Window
Set the Window’s Title and Other Attributes
Set the Application Name in the Menu
Configure a Text Field
Duplicate an Object
Change the Attributes of a Text Field
Assign Labels to the Fields
Configure a Button
Add a Horizontal Decorative Line
Interface Layout and Object Alignment
Finalize the Window Layout
Enable Tabbing Between Text Fields
Set the First Responder for the Currency Converter Window
Test the Interface

Defining the ConverterController Class

Classes and Objects
Specify the ConverterController Class
Paths for Object Communication: Outlets, Targets, and Actions
Define the User Interface and Model Outlets of the ConverterController Class
Define the Actions of the ConverterController Clas

Interconnecting the ConverterController Class and the User Interface

Create an Instance of the ConverterController Class
Connect the ConverterController Class to the Text Fields
Connect the Convert Button to the ConverterController convert Action Method

Defining the Converter Class

Chapter 2
Implementing Currency Converter

Generate the Source Files
Place the Implementation Files in the Appropriate Group
Implement the Currency Converter Classes

Chapter 3
Building Currency Converter

Overview of the Build Process
Build the Currency Converter Application
Look Up Documentation
Run Currency Converter
Correct Build Errors
Great Job!

Chapter 4
Expanding on the Basics

Application and Window Behavior
Controls and Text
Menu Commands
Document Management
File Management
Communicating With Other Applications
Custom Drawing and Animation
Internationalization
Editing Support
Printing
Help
Plug-in Architecture

Chapter 5

Adopting Objective-C
Learn the Objective-C Language
Learn the Cocoa Class Hierarchy
Learn Memory Management in Cocoa

Document Revision History

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