Question

JAVA的gui怎么让时间实时更新呢？

我让他只能定在一秒。。。没法变。求教~谢谢！

Answer 1

import javax.swing.JFrame;
import javax.swing.JLabel;
import java.util.Calendar;
import java.util.Date;

public class Test
{
public static void main(String[] args)
{
JFrame f=new JFrame("test");
f.setVisible(true);
JLabel L=new JLabel();
f.setLayout(null);
new Thread(new Time(L)).start();
L.setBounds(300,300,100,30);
f.add(L);
f.validate();
}
}
class Time implements Runnable
{
JLabel L;
public Time(JLabel L)
{
this.L=L;
}

public void run()
{
while(true)
{
Calendar C=Calendar.getInstance();
C.setTime(new Date());
int h=C.get(Calendar.HOUR);
int m=C.get(Calendar.MINUTE);
int s=C.get(Calendar.SECOND);
L.setText(""+h+"/"+m+"/"+s);
try
{
Thread.sleep(1000);
}
catch(Exception e)
{}
}
}
}