java数字时钟

Question

小弟刚学JAVA
想做一个数字的时钟.怎么样才能时取得的时间是在一秒一秒的走动的呢??

Answer 1

jdk目录/demo/applet/clock是一个图形时钟，你把它改成数字的就可以了

Answer 2

import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.BorderLayout;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;
import java.util.Date;
import java.text.SimpleDateFormat;public class ClockFrame extends JFrame implements Runnable,WindowListener
{
private Thread timer=null;
private JLabel jLabel=null;
private SimpleDateFormat sdf=null;
private boolean go; public ClockFrame()
{
super("时钟测试"); sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date now=new Date(); jLabel=new JLabel(sdf.format(now));
getContentPane().add(jLabel,BorderLayout.CENTER);
addWindowListener(this);
setSize(100,50);
setLocation(300,200); go=true;
timer=new Thread(this);
timer.start();
} public void run()
{
while(go)
{
try
{
timer.sleep(1000);
}catch(InterruptedException e){
e.printStackTrace();
}finally
{
jLabel.setText(sdf.format(new Date()));
}
}
}
public void windowActivated(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowClosing(WindowEvent e){
go=false;
setVisible(false);
System.exit(0);
}
public void windowDeactivated(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowOpened(WindowEvent e){} public static void main(String args[])
{
new ClockFrame().setVisible(true);
}
};