- Java code
import javax.swing.*;import java.awt.*;import java.awt.event.*;class GWindows extends JFrame { public GWindows() { super("123"); setSize(246,351); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setResizable(false); this.setVisible(true); } }class DR implements Runnable{ int i=0; public void run() { System.out.println(i++); try { Thread.currentThread().sleep(100); } catch (InterruptedException ex) { ex.printStackTrace(); } }}class DC implements KeyListener{ public void keyPressed(KeyEvent e) { } public void keyReleased(KeyEvent e) { } public void keyTyped(KeyEvent e) { }}class G extends JPanel implements Runnable{ Thread thread1,thread2; DR dr=new DR(); DC dc=new DC(); public G() { GWindows gwindows =new GWindows(); gwindows.getContentPane().add(this); gwindows.addKeyListener(dc); thread1=new Thread(dr); thread1.start(); thread2=new Thread(this); thread2.start(); } public void paint(Graphics g) { super.paint(g); Color save_color=g.getColor(); g.setColor(new Color(255,255,0)); g.fillRect(0,0,240,320); } public void run() { while(true) { repaint(); try { thread2.sleep(100); } catch (InterruptedException ex) { ex.printStackTrace(); } } } }public class Test{ public static void main(String[] args) { new G(); }}thread1这个线程怎么不会执行i不会持续打印输出------解决方案--------------------
上面写错了，你是程序忘记写一个for语句了吧.
class DR implements Runnable
{
int i = 0 ;
public void run ( )
{
for(int i = 0 ; i< 100; i++) {
System.out.println ( i ++ ) ;
try
{
String name = Thread.currentThread().getName();
System.out.println ("name ="+name) ;
Thread.currentThread ( ).sleep (1000 ) ;
} catch ( InterruptedException ex )
{
ex.printStackTrace ( ) ;
}
}
}
}