simple.java

java程序设计 清华出版社 孙燮华老师编写的程序源代码

//Simple.java
import java.applet.Applet;
import java.awt.Graphics;

public class Simple extends Applet{
  StringBuffer buffer;
  public void init(){
    buffer=new StringBuffer();
    addItem("initializing...");
  }
  public void start(){
    addItem("starting...");
  }
  public void stop(){
    addItem("stopping...");
  }    
  public void destroy(){
    addItem("preparing for unloading...");
  }    
  void addItem(String newWord){
    System.out.println(newWord);
    buffer.append(newWord);
    repaint();
  }
  public void paint(Graphics g){
    //画一个矩形作为Applet的显示区
    g.drawRect(0,0,400,200);
    //在这个矩形中写字符
    g.drawString(buffer.toString(), 5,15);
  }
}