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<html><head><title>Untitled Document</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><link rel="stylesheet" href="../../css/text.css" type="text/css"></head><body bgcolor="#FFFFFF" text="#000000"><center><table width="95%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class=text> <p><b>三、 编程题答案</b></p> <p>编程第<font color="#0000FF">1</font>题<br> 第一种方式：<br> <font color="339900">/*Creats two threads that write their names and sleep. The main thread also writes its <br> /*name and sleeps. <br> */</font></p> <p> import java.io.*;<br> public class NameThread extends Thread{<br> int time; <font color="339900">//time in milliseconds to sleep</font><br> public NameThread(String n,int t){<br> super(n);<br> time=t;<br> }<br> public void run(){<br> for(int i=1;i<=5;i++){<br> System.out.println(getName()+" "+i);<br> try{<br> Thread.sleep(time);<br> }catch(InterruptedException e){return;}<br> }<br> }</p> <p> public static void main（String args[]）{<br> NameThread bonnie=new NameThread("Bonnie"，1000)；<br> bonnie.start();<br> NameThread clyde=new NameThread("Clyde"，700)；<br> clyde.start();<br> for(int i=1;i<=5;i++){<br> System.out.println(Thread.currentThread().getName()+" "+i);<br> try{<br> Thread.sleep(1100);<br> }catch(InterruptedException e){return;}<br> }<br> }<br> }</p> <p><br> 第二种方式：<br> import java.io.*;<br> public class NameUsingThread implements Runnable{<br> private int time;<br> private Thread thread; <font color="339900">//the thread to execute the run method<br> </font><br> public NameUsingThread(String n,int t){<br> time=t;<br> thread=new Thread(this,n);<br> thread.start();<br> }</p> <p> public void run(){<br> for(int i=1;i<=5;i++){<br> System.out.println(thread.getName()+" "+i);<br> try{<br> Thread.sleep(time);<br> }catch(InterruptedException e){return;}<br> }<br> }<br> <br> public static void main(String args[]){<br> NameUsingThread bonnie=new NameUsingThread("Bonnie",1000);<br> NameUsingThread clyde=new NameUsingThread("Clyde",1000);<br> for(int i=1;i<=5;i++){<br> System.out.println(Thread.currentThread().getName()+" "+i);<br> try{<br> Thread.sleep(1000);<br> }catch(InterruptedException e){return;}<br> }<br> }<br> }<br> </p> <p><br> 编程第<font color="#0000FF">2</font>题<br> import java.awt.*;<br> import java.util.*;<br> import java.awt.event.*;</p> <p> public class ThreeClocks extends Panel implements Runnable{<br> private int timee;<br> private Thread thd;<br> <br> public ThreeClocks(int t){<br> timee=t;<br> thd=new Thread(this);<br> thd.start();<br> }<br> <br> public void run(){<br> while(thd!=null){<br> repaint();<br> try{<br> thd.sleep(timee);<br> }catch(InterruptedException e){}<br> }<br> }</p> <p> public void paint(Graphics g){<br> Date now=new Date();<br> g.drawString(now.getHours()+":"+now.getMinutes()+":"+now.getSeconds(),5,10);<br> }<br> <br> public static void main(String args[]){<br> ThreeClocks Clock1,Clock2,Clock3;<br> Clock1=new ThreeClocks(1000);<br> Clock2=new ThreeClocks(5000);<br> Clock3=new ThreeClocks(10000);<br> Frame f=new Frame("Three Clocks running together");<br> f.setSize(200,100);<br> f.setVisible(true);<br> f.addWindowListener(new WindowAdapter(){<br> public void windowClosing(WindowEvent e){System.exit(1);}});<br> f.setLayout(new GridLayout(1,3));<br> f.add(Clock1);<br> f.add(Clock2);<br> f.add(Clock3);<br> }<br> } <!--czp-wenda-daan--> </p> </td> </tr></table> </center></body></html>⌨️ 快捷键说明
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