Java 倒计时【收藏】

http://haidii.javaeye.com/blog/284821
最近用java编写了一个倒计时的程序，贴出来与大家共享。
先看看截图吧：
1.开始打开程序时的界面

2.设定好时间，点击“开始计时”时的界面

3.定时时间到时的界面

4.退出程序时的界面

5.同时，本程序具有检测功能，对您的时间输入进行检测

下面是源码：
 
     package test;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.Timestamp;
import java.util.Calendar;
import java.util.GregorianCalendar;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Countdown extends JFrame implements ActionListener{
    private static final long serialVersionUID = -3439634693767815667L;
    private JLabel startTime,pastTime,label1,label2,lyear,lmonth,lday,lhour,lmin,lsec;
    private JTextField year,month,day,hour,min,sec;
    private JButton ok;
    private String str;
    private int y,m,d,h,mi,s;
    private boolean runflag=true; 
    
    public Countdown(){
        super("倒计时牌");
        init();
        this.setSize(450,150);
        Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
        int h = (int) d.getHeight() / 3;
        int w = (int) d.getWidth() / 3;
        this.setLocation(w, h);
        this.setVisible(true);
        this.setResizable(false);
        this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        this.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e) {
                int exit=JOptionPane.showConfirmDialog(Countdown.this, "确定退出吗？", "退出", JOptionPane.OK_CANCEL_OPTION);
                if(exit==JOptionPane.OK_OPTION)
                    System.exit(0);
            }
        });
    }
    private void init(){
        label1=new JLabel("现在距规定时间还有:");
        label2=new JLabel();
        startTime=new JLabel("开始时间：");
        pastTime=new JLabel("已过时间：");
        
        JPanel north=new JPanel();
        north.setLayout(new BorderLayout());
        north.add(label1,BorderLayout.CENTER);
        north.add(startTime,BorderLayout.NORTH);
        
        this.add(north,BorderLayout.NORTH);
        this.add(label2,BorderLayout.CENTER);
        
        JPanel south=new JPanel();
        south.setLayout(new BorderLayout());
        JPanel south_center=new JPanel();
        Calendar c=Calendar.getInstance();
        year=new JTextField(c.get(Calendar.YEAR)+"",6);
        month=new JTextField(c.get(Calendar.MONTH)+1+"",4);
        day=new JTextField(c.get(Calendar.DAY_OF_MONTH)+"",4);
        hour=new JTextField(c.get(Calendar.HOUR_OF_DAY)+"",4);
        min=new JTextField(c.get(Calendar.MINUTE)+"",4);
        sec=new JTextField(c.get(Calendar.SECOND)+"",4);
        lyear=new JLabel("年");
        lmonth=new JLabel("月");
        lday=new JLabel("日");
        lhour=new JLabel("时");
        lmin=new JLabel("分");
        lsec=new JLabel("秒");
        ok=new JButton("开始计时");
        south_center.add(year);
        south_center.add(lyear);
        south_center.add(month);
        south_center.add(lmonth);
        south_center.add(day);
        south_center.add(lday);
        south_center.add(hour);
        south_center.add(lhour);
        south_center.add(min);
        south_center.add(lmin);
        south_center.add(sec);
        south_center.add(lsec);
        south_center.add(ok);
        south.add(south_center,BorderLayout.CENTER);
        south.add(pastTime,BorderLayout.NORTH);
        this.add(south,BorderLayout.SOUTH);
        
        ok.addActionListener(this);
        label1.setFont(new Font("宋体",Font.BOLD,20));
        label2.setFont(new Font("宋体",Font.BOLD,26));
        label1.setForeground(new Color(154,0,255));
        label2.setForeground(Color.RED);
    }
    
    public synchronized void stopthread(){
        runflag=false;
    }
    
    public synchronized void startthread(){
        runflag=true;
    }
    public synchronized boolean getrunflag(){
        return runflag;
    }
    
    class MyThread extends Thread{
        Calendar target=null;
        Calendar startTime=null;
        long targetInMill=0;
        long startInMill=0;
        
        private MyThread(int y,int m,int d,int h,int mi,int s){
            target=new GregorianCalendar(y,m-1,d,h,mi,s); 
            startTime=Calendar.getInstance();
            startInMill=startTime.getTimeInMillis();
            targetInMill=target.getTimeInMillis();
        }
        public void run(){
            while(runflag){
                runflag=true;
                Calendar today=new GregorianCalendar(); 
                long todayInMill=today.getTimeInMillis();
                long dd=targetInMill-todayInMill;
                long dis=dd/1000;
                long ms=(dd/100)%10;
                long mms=(dd/10)%10;
                String d;
                int day=(int) (dis/(3600*24));
                int hour=(int) (dis%(3600*24)/3600);
                int min=(int) (dis%3600/60);
                int sec=(int) (dis%60);
                if(day<10)
                    d="  "+day;
                else if(day>=10&&day<100)
                    d=" "+day;
                else
                    d=day+"";
                String s=d+" 天 "+intToString(hour)+" 小时 "+intToString(min)+" 分 "+intToString(sec)+" 秒"+ms+" "+mms;
                label2.setText(s);
                pastTime();
                if(dd<=0){
                    ok.setText("重新开始");
                    JOptionPane.showMessageDialog(Countdown.this, "时间到");
                    break;
                }
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
        
        private void pastTime(){
            Calendar today=new GregorianCalendar(); 
            long nowInMill=today.getTimeInMillis();
            long dd=nowInMill-startInMill;
            long dis=dd/1000;
            long ms=(dd/100)%10;
            long mms=(dd/10)%10;
            String d;
            int day=(int) (dis/(3600*24));
            int hour=(int) (dis%(3600*24)/3600);
            int min=(int) (dis%3600/60);
            int sec=(int) (dis%60);
            if(day<10)
                d="  "+day;
            else if(day>=10&&day<100)
                d=" "+day;
            else
                d=day+"";
            String s=d+" 天 "+intToString(hour)+" 小时 "+intToString(min)+" 分 "+intToString(sec)+" 秒"+ms+" "+mms;
            pastTime.setText("已过时间："+s);
        }
    }
    public String intToString(int i){
        if(i<10){
            str="0"+i;
            return str;
        }
        else 
            return i+"";
    }
    
    public void actionPerformed(ActionEvent e) {
        String str=e.getActionCommand();
        MyThread t=null;
        if(str.equals("开始计时")){
            try {
                this.startthread();
                startTime.setText("开始时间："+new Timestamp(System.currentTimeMillis()));
                y=Integer.parseInt(year.getText());
                m=Integer.parseInt(month.getText());
                d=Integer.parseInt(day.getText());
                h=Integer.parseInt(hour.getText());
                mi=Integer.parseInt(min.getText());
                s=Integer.parseInt(sec.getText());
                year.setEditable(false);
                month.setEditable(false);
                day.setEditable(false);
                hour.setEditable(false);
                min.setEditable(false);
                sec.setEditable(false);
//              ok.setEnabled(false);
                ok.setText("停止");
                t=new MyThread(y,m,d,h,mi,s);
                t.start();
            } catch (NumberFormatException e1) {
                JOptionPane.showMessageDialog(this, "对不起，请输入数字！", "错误提示", JOptionPane.ERROR_MESSAGE);
            }
        }
        if(str.equals("停止") || str.equals("重新开始")){
            this.stopthread();
            year.setEditable(true);
            month.setEditable(true);
            day.setEditable(true);
            hour.setEditable(true);
            min.setEditable(true);
            sec.setEditable(true);
            ok.setText("开始计时");
        }
        
    }
    
    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
            new Countdown();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (UnsupportedLookAndFeelException e) {
            e.printStackTrace();
        }
    }
}
 
    
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