java关于线程的一些实例

				import java.awt.*;
				import java.applet.*;
				import java.awt.event.*;
				public class Thread6 extends Applet implements ActionListener,Runnable{
					TextField tf1,tf2;
					boolean boo;
					int x=0;
					Thread t=null;
					public void init(){
						t=new Thread(this);
						tf1=new TextField();
						tf2=new TextField();
						add(tf1);
						add(tf2);
						tf1.addActionListener(this);
					}
					public void start(){
						boo=false;
						try{
							t.start();
						}catch(Exception e){}
					}
					public void run(){
						while(true){
							x=x+5;
							if(x>200) x=0;
							repaint();
							try{
								t.sleep(80);
							}catch(InterruptedException e){}
							if(boo){
								return ;
							}
						}
					}
					public void paint(Graphics g){
						g.drawString("adkjdial", x, 10);
					}
					public void actionPerformed(ActionEvent e){
						if(tf1.getText().equals("boy")){
							tf2.setText("男孩");
						}
						else if(tf1.getText().equals("moon")){
							boo=true;
						}
						else {
							tf2.setText("没有该单词");
						}
					}
				
				}