clock.java

用JAVA写的《时钟》程序

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
//import javax.swing.Timer;
import javax.swing.UIManager;
import java.util.*;




 interface TimerInterface {
  void timeSpare(Timer t);
}


 class SimpleClock extends JFrame {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();

  //Construct the frame
  public SimpleClock() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(360, 360));
    this.setTitle("时钟和日期");
    contentPane.add(new Panel());
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }
}







public class Clock {
  boolean packFrame = false;

  //Construct the application
  public Clock() {
    SimpleClock frame = new SimpleClock();
    //Validate frames that have preset sizes
    //Pack frames that have useful preferred size info, e.g. from their layout
    if (packFrame) {
      frame.pack();
    }
    else {
      frame.validate();
    }
    //Center the window
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
    frame.setVisible(true);
  }
  //Main method
  public static void main(String[] args) {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    new Clock();
  }
}






 class Panel extends JPanel implements TimerInterface{
  private Calendar calendar;//用于获取当前时间
  private String year,month1,day1,week1,hour,minute,second;
  private int seconds;
  int s,m ,h,offset=-350,a,i=1;  //offset为X方向的偏移量
  int week2,month2,day2;
  int xcenter=180,ycenter=160; //定义时钟指针的旋转枢纽
  BorderLayout borderLayout1 = new BorderLayout();
  public Panel() {
    try {
      jbInit();
    }
    catch(Exception ex) {
      ex.printStackTrace();
    }
  }
  void jbInit() throws Exception { //初始化
    this.setLayout(borderLayout1);
    Timer t=new Timer(50,this);/////////////////////////////
    t.start();
  }
  public void timeSpare(Timer t){
  /**@todo Implement this simpleclock.TimerInterface abstract method*/
  //本方法主要是实现获得系统当前时间，年，月，日，时，分，秒
    calendar=new GregorianCalendar();
    Date rightnow=new Date();
    calendar.setTime(rightnow);
    year = String.valueOf(calendar.get(Calendar.YEAR));
    week2=calendar.get(Calendar.DAY_OF_WEEK);
    month2=calendar.get(Calendar.MONTH);
    day2=calendar.get(Calendar.DAY_OF_MONTH);
    hour = String.valueOf(calendar.get(Calendar.HOUR));
    h=calendar.get(Calendar.HOUR);
    minute = String.valueOf(calendar.get(Calendar.MINUTE));
    m=calendar.get(Calendar.MINUTE);
    second = String.valueOf(calendar.get(Calendar.SECOND));
    seconds=calendar.get(Calendar.HOUR)*60*60+calendar.get(Calendar.MINUTE)*60+calendar.get(Calendar.SECOND);
    repaint();
}

  protected void paintComponent(Graphics g) {
    /**@todo Override this javax.swing.JComponent method*/
    super.paintComponent(g);
     //生成一个图片镜像，并显示背景图片
     Image image=new ImageIcon("clock.jpg").getImage();
     g.drawImage(image,0,0,null);
    
    double secondAngle=2*Math.PI*seconds/60; //计算秒针与12点钟的方向
    int [] minX={((int) (Math.cos(m * 3.14f/ 30 - 3.14f/ 2) * 98 + xcenter)),((int) (Math.cos(m * 3.14f/ 30) * (10) + xcenter)),((int) (Math.cos(m * 3.14f/ 30 + 3.14f* 5 / 12) * (15) + xcenter)),((int) (Math.cos(m * 3.14f/ 30 + 3.14f* 7 / 12) * (15) + xcenter)),((int) (Math.cos(m * 3.14f/ 30 - 3.14f) * (10) + xcenter))};
    int [] minY={((int) (Math.sin(m * 3.14f/ 30 - 3.14f/ 2) * 98 + ycenter)),((int) (Math.sin(m * 3.14f/ 30) * (10) + ycenter)),((int) (Math.sin(m * 3.14f/ 30 + 3.14f* 5 / 12) * (15) + ycenter)),((int) (Math.sin(m * 3.14f/ 30 + 3.14f* 7 / 12) * (15) + ycenter)),((int) (Math.sin(m * 3.14f/ 30 - 3.14f) * (10) + ycenter))};
      //构造时针五个点的坐标
    int [] houX={((int) (Math.cos((h * 30 + m / 2) * 3.14f/ 180 - 3.14f/ 2) * 75 + xcenter)),((int) (Math.cos((h * 30 + m / 2) * 3.14f/ 180) * 12 + xcenter)),((int) (Math.cos((h * 30 + m / 2) * 3.14f/ 180 + 3.14f* 5/ 12) * 20 + xcenter)),((int) (Math.cos((h * 30 + m / 2) * 3.14f/ 180 + 3.14f* 7/ 12) * 20 + xcenter)),((int) (Math.cos((h * 30 + m / 2) * 3.14f/ 180 - 3.14f) * 12 + xcenter))};
    int [] houY={((int) (Math.sin((h * 30 + m / 2) * 3.14f/ 180 - 3.14f/ 2) * 75 + ycenter)),((int) (Math.sin((h * 30 + m / 2) * 3.14f/ 180) * 12 + ycenter)),((int) (Math.sin((h * 30 + m / 2) * 3.14f/ 180 + 3.14f* 5/ 12) * 20 + ycenter)),((int) (Math.sin((h * 30 + m / 2) * 3.14f/ 180 + 3.14f* 7/ 12) * 20 + ycenter)),((int) (Math.sin((h * 30 + m / 2) * 3.14f/ 180 - 3.14f) * 12 + ycenter))};
     //用yellow颜色填充分针
    g.setColor(Color.YELLOW);
    g.fillPolygon(minX,minY,minX.length);    //画一个小圆以构造指针的枢纽
    g.setColor(Color.GREEN);   //用GREEN色填充时针
    g.fillPolygon(houX,houY,houX.length);
     g.setColor(Color.red); //画秒针
    g.drawLine(180,160,180+(int)(90*Math.cos(secondAngle-Math.PI/2)),160+(int)(90*Math.sin(secondAngle-Math.PI/2)));
      //构造分针五个点的坐标。
     g.setColor(Color.black);
     g.fillOval(175,160,10,10);   //实现跑马灯
    if (offset> 360) {//如果大于面板的宽度，则往左走
          a = -3;
    } else if (offset<= 0) {//如果小面板的宽度，则往右走
         a = 3;
      }
         offset = offset + a;
         
         Font f=new Font("New Roman",Font.BOLD,14);//设置字体的大小，类型
    g.setFont(f);
    switch(week2){ //把星期转化为大写表示
    	case 1:week1="日";break;
    	case 2:week1="一";break;
    	case 3:week1="二";break;
    	case 4:week1="三";break;
    	case 5:week1="四";break;
    	case 6:week1="五";break;
    	case 7:week1="六";break;
    }
    
    switch(month2){ //把月分转化为大写表示
        case 0:month1="一";break;
    	case 1:month1="二";break;
    	case 2:month1="三";break;
    	case 3:month1="四";break;
    	case 4:month1="五";break;
    	case 5:month1="六";break;
    	case 6:month1="七";break;
    	case 7:month1="八";break;
    	case 8:month1="九";break;
    	case 9:month1="十";break;
    	case 10:month1="十一";break;
    	case 11:month1="十二";break;
    }
    
    switch(day2){ //把日转化为大写表示
    	case 1:day1="一";break;
    	case 2:day1="二";break;
    	case 3:day1="三";break;
    	case 4:day1="四";break;
    	case 5:day1="五";break;
    	case 6:day1="六";break;
    	case 7:day1="七";break;
    	case 8:day1="八";break;
    	case 9:day1="九";break;
    	case 10:day1="十";break;
    	case 11:day1="十一";break;
    	case 12:day1="十二";break;
    	case 13:day1="十三";break;
    	case 14:day1="十四";break;
    	case 15:day1="十五";break;
    	case 16:day1="十六";break;
    	case 17:day1="十七";break;
    	case 18:day1="十八";break;
    	case 19:day1="十九";break;
    	case 20:day1="二十";break;
    	case 21:day1="二十一";break;
    	case 22:day1="二十二";break;
    	case 23:day1="二十三";break;
    	case 24:day1="二十四";break;
    	case 25:day1="二十五";break;
    	case 26:day1="二十六";break;
    	case 27:day1="二十七";break;
    	case 128:day1="二十八";break;
    	case 29:day1="二十九";break;
    	case 30:day1="三十";break;
    	case 31:day1="三十一";break;
    	
    }
     //把日期画在面板上
         g.drawString("  ",140,100);
         g.drawString("  ",123,125);
         g.drawString("开始调试:07.1.8",130,225);
         g.drawString("结束调试:07.1.13",130,245);
         g.drawString("星期"+week1+",  "+month1+"月"+day1+"日,  "+year+"年  "+hour+": "+minute+": "+second, offset, 320); //写上时间文字
    
  }
}





 class Timer extends Thread {//定义一个timer类，并继承Thread
  private int spare;
  private TimerInterface ti;
  public Timer(int i,TimerInterface t){
    spare=i;
    ti=t;
    setDaemon(true);
  }
  public void run(){
    try{
      while(!interrupted()){
        sleep(spare); //每1秒走一次
        ti.timeSpare(this);
      }
    }catch(InterruptedException e){

    }
  }
  public static void main(String[] args) {
  }
}