话不多说，上源码！
package timerDemo;
import java.awt.BorderLayout;
public class TimerCountDemo extends JPanel implements Runnable,ActionListener{
private ScrollPane scrollPane;
private TextArea resultTimeText;
private JLabel currentTimeLabel;
private Calendar currentCalendar;
private Date currentDate;
private JButton startJButton;
private JButton quanJButton;
private JButton secondButton;
private JButton stopJButton;
private JButton showTimeJButton;
private Thread t;
private static int i=1; //圈数
private static int hour,min,sec,msec,totalTime;
private static boolean flag=true;
public TimerCountDemo() {
// TODO Auto-generated constructor stub
startJButton=new JButton("开始");
showTimeJButton=new JButton("00-00-00");
showTimeJButton.setBackground(SystemColor.activeCaption);
showTimeJButton.setFont(new Font("叶根友钢笔行书升级版", Font.PLAIN, 14));
quanJButton=new JButton("以圈计时");
quanJButton.setEnabled(false); //初始化时设为false
secondButton=new JButton("以秒计时");
secondButton.setEnabled(false); //初始化时设为false
stopJButton=new JButton("停止");
stopJButton.setBackground(Color.red); //设置背景色为红色
scrollPane=new ScrollPane();
resultTimeText=new TextArea(20,20);
resultTimeText.setEditable(false);
scrollPane.setEnabled(true);
currentCalendar=Calendar.getInstance();
scrollPane.setBackground(Color.WHITE);
currentTimeLabel=new JLabel();
currentDate=new Date();
currentTimeLabel.setText("当前时间：");
this.setLayout(new BorderLayout());
JPanel pNorth=new JPanel(new GridLayout(2,1));
pNorth.add(currentTimeLabel);
pNorth.add(showTimeJButton);
this.add(pNorth,BorderLayout.NORTH); //添加当前时间Label
this.add(scrollPane,BorderLayout.CENTER); //添加
JPanel panel=new JPanel(new GridLayout(2,2));
panel.add(quanJButton);
panel.add(secondButton);
panel.add(startJButton);
panel.add(stopJButton);
this.add(panel,BorderLayout.SOUTH);
t=new Thread(this);
t.start();
startJButton.addActionListener(this);
quanJButton.addActionListener(this);
secondButton.addActionListener(this);
stopJButton.addActionListener(this);
}
@Override
public void run() {
// TODO Auto-generated method stub
try {
while(true){
int mHour=new Date().getHours();
int mMin=new Date().getMinutes();
int mSec=new Date().getSeconds();
int mTotalTime=mHour*3600+mMin*60+mSec;
int diffHour=(mTotalTime-totalTime)/3600;
int diffMin=(mTotalTime-totalTime)%3600/60;
int diffSec=(mTotalTime-totalTime)%3600%60;
Thread.sleep(10);
currentTimeLabel.setText("当前时间："+mHour+":"+mMin+":"+mSec);
if(!flag){
showTimeJButton.setText(""+diffHour+"-"+diffMin+"-"+diffSec);
}//if(!flag)
}//while
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
@SuppressWarnings("deprecation")
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource()==startJButton){
hour= (new Date()).getHours();
min=(new Date()).getMinutes();
sec=(new Date()).getSeconds();
totalTime=hour*3600+min*60+sec;
startJButton.setEnabled(false);
quanJButton.setEnabled(true);
secondButton.setEnabled(true);
flag=false;
}
//if(!flag){
int xhour=new Date().getHours(); //获得此刻小时
int xmin=new Date().getMinutes(); //获得此刻分钟
int xSec=new Date().getSeconds(); //获得此刻秒
int xTotalTime=xhour*3600+xmin*60+xSec; //获取此刻总时间
int bHour=(xTotalTime-totalTime)/3600;
int bMin=(xTotalTime-totalTime)%3600/60;
int bSec=(xTotalTime-totalTime)%3600%60;
//quanJButton
if(e.getSource()==quanJButton){
resultTimeText.append("第"+(i++)+"圈:"+bHour+":"+bMin+":"+bSec+"\n");
scrollPane.add(resultTimeText);
secondButton.setEnabled(false);
}//quanJButton
//secondButton
if(e.getSource()==secondButton){
resultTimeText.append(bHour+":"+bMin+":"+bSec+"\n");
scrollPane.add(resultTimeText);
quanJButton.setEnabled(false);
}//secondButton
//stopJButton
if(e.getSource()==stopJButton){
if(stopJButton.getText()=="停止"){
//System.out.println("Test停止");
hour=0;
sec=0;
min=0;
stopJButton.setText("清除");
quanJButton.setEnabled(false);
secondButton.setEnabled(false);
flag=true;
}//stopJButton.getText()=="停止"
else if(stopJButton.getText()=="清除"){
i=1;
stopJButton.setText("停止");
resultTimeText.setText("");
startJButton.setEnabled(true);
showTimeJButton.setText("00-00-00");
}//stopJButton.setText("清除");
}//stopJButton
}//if(!flag)
// flag=false;
//}//if(!flag)
public static void main(String args[]){
JFrame jf=new JFrame("Demo");
try{
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
}catch(Exception e){
e.printStackTrace();
}
TimerCountDemo xCountDemo=new TimerCountDemo();
jf.setBounds(200,200,250,300);
jf.getContentPane().add(xCountDemo);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setVisible(true);
}
}
初始化界面
开始
以圈计时
以圈计时
以秒计时
原文地址：http://blog.csdn.net/carvin_zh/article/details/46509087
