1. Chapter1 Introduction to Java Overview of the Java What Is the Java Technology The Java Virtual Machine A First Application in Java A First Applet in Java A Basic Java Application Using OO Java Terminology and Technology Products CCE JMU China ZhangJM 2008-09

2. Reference Thinking in Java （中、英版） The Java Tutorial Sun Microsystems Java™ Programming Language （中、英版） ( 作者： Ken Arnold 、 James Gosling 、 David Holmes) Java 程序设计教程 袁兆山等译 机械工业出版社 CCE JMU China ZhangJM 2008-09

3. Overview of Java Past Today Future CCE JMU China ZhangJM 2008-09

4. Originally named Oak Main team members: Bill Joy, Patrick Naughton, Mike Sheridan, James Gosling Original goal: use with home appliances In 1994, team realized Oak was perfect for Internet Announced in May of 1995 First non-beta release in 1996 Java technology is free The Origin of the Java Programming Language CCE JMU China ZhangJM 2008-09

8. Java 的渗透力 CCE JMU China ZhangJM 2008-09

9. Java belongs to the world CCE JMU China ZhangJM 2008-09

10. Joining & Sharing CCE JMU China ZhangJM 2008-09

12. What Is the Java Technology? Java technology is: A programming language A development environment An application environment A deployment environment It is used for developing both Applets and Applications CCE JMU China ZhangJM 2008-09

13. Java Is A Programming Language CCE JMU China ZhangJM 2008-09

14. Java Is A Platform CCE JMU China ZhangJM 2008-09

15. Building a Better Language Object-oriented Distributed Multi-threading Security APIs (pre-written code) Easily portable to multiple platforms (Write Once, Run Anywhere™) CCE JMU China ZhangJM 2008-09

16. Primary Goals of the Java Technology Provides an easy-to-use language by: Avoiding many pitfalls of other languages Being object-oriented Enabling users to create streamlined and clear code Provides an interpreted environment for: Improved speed of development Code portability CCE JMU China ZhangJM 2008-09

17. Primary Goals of the Java Technology The following features fulfill these goals: The JVM Garbage collection Code security CCE JMU China ZhangJM 2008-09

18. Java Programs Applets and Applications Application – Runs in the operating system Applet – Runs in a browser, does smaller tasks CCE JMU China ZhangJM 2008-09

19. Basic Components of a Computer CCE JMU China ZhangJM 2008-09

21. Applications must use same languages as operating and hardware CCE JMU China ZhangJM 2008-09

22. Two Ways of Solving the Communication Problem Compiled - communicates with only one kind of computer Interpreted - communicates with any kind of computer CCE JMU China ZhangJM 2008-09

27. How Applications Run

28. How Applets Run CCE JMU China ZhangJM 2008-09

30. A First Application in Java //A First Application in Java public class HelloWorld{ public static void main(String[] args){ System.out.println("Hello World!"); } CCE JMU China ZhangJM 2008-09

31. Run the Application HelloWorld CCE JMU China ZhangJM 2008-09

32. A first Applet in Java // A first Applet in Java import javax.swing.JApplet; // 导入 Java API 的 JApplet 类 import java.awt.Graphics; // 导入 Java API 的 JGraphics 类 public class HelloWorldApplet extends JApplet { public void paint( Graphics g ) { g.drawString( "Hello World!", 25, 25 ); } 创建 HTML 文件，以将 HelloWorldApplet.java 编译所得 HelloWorldApplet.class 载入浏览器运行。 HelloWorldApplet.html 文件为： CCE JMU China ZhangJM 2008-09

33. Run the applet HelloWorldApplet CCE JMU China ZhangJM 2008-09

34. Run the applet HelloWorldApplet CCE JMU China ZhangJM 2008-09

39. The Java Technology Products and Terminology

40. CCE JMU China ZhangJM 2008-09

42. 各章内容概述 CCE JMU China ZhangJM 2008-09