repaint重绘

Question

问个很菜的问题，多线程repaint如何控制重绘paint时间间隔我的代码：import java.awt.*;
import java.applet.*;
import java.util.Calendar;
public class pro extends Applet
{
    public void paint(Graphics g)
    {
        Calendar c=Calendar.getInstance();
        g.drawString("当前时间:"+c.get(c.YEAR)+"年"+c.get(c.MONTH)+"月"+c.get(c.DATE)+"日",10,10);
        g.drawString("当前时间:"+c.get(c.HOUR)+"时"+c.get(c.MINUTE)+"分"+c.get(c.SECOND)+"秒",10,25);
        repaint();
    }
} 
如何让他每隔2秒刷新一次

Answer 1

import java.awt.*; 
import java.applet.*; 
import java.util.Calendar; 
public class pro extends Applet 
{ 
    public void paint(Graphics g) 
    { 
        Calendar c=Calendar.getInstance(); 
        g.drawString("當前時間:"+c.get(c.YEAR)+"年"+c.get(c.MONTH)+"月"+c.get(c.DATE)+"日",10,10); 
        g.drawString("當前時間:"+c.get(c.HOUR)+"時"+c.get(c.MINUTE)+"分"+c.get(c.SECOND)+"秒",10,25); 
        try {
Thread.currentThread().sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
        repaint(); 
    } 
} 

Answer 2

如果楼主用的是单线程的，楼上的可能导致整个程序暂停2秒，
建议楼主用javax.swing.Timer试试吧，或者在另外一个线程里调用paint（），并sleep（）

Answer 3

import java.awt.*;
import java.applet.*;
import java.util.Calendar;
public class pro extends Applet implements Runnable
{
    public void paint(Graphics g)
    {
        Calendar c=Calendar.getInstance();
        g.drawString("当前时间:"+c.get(c.YEAR)+"年"+c.get(c.MONTH)+"月"+c.get(c.DATE)+"日",10,10);
        g.drawString("当前时间:"+c.get(c.HOUR)+"时"+c.get(c.MINUTE)+"分"+c.get(c.SECOND)+"秒",10,25);
    }
    public void run()
    {
          try
          {
                Thread.sleep(2000);
          }
          catch(Exception e){}
          repaint();
    }
}