import java.awt.;

public class Clock extends JComponent{

• */

  private static final long serialVersionUID = -5379472973578609775L;
  private Font f = new Font("微软雅黑",Font.PLAIN,15);
  private Font f2 = new Font("微软雅黑",Font.BOLD,15);
  private JLabel l = new JLabel("当前时间：");
  private JLabel display = new JLabel();
  private JLabel display2 = new JLabel("");
  private int hour = 0;
  private int min = 0;
  private int sec = 0;
  private Date now = new Date();
  private Graphics2D g;
  final double PI = Math.PI;
  private String strTime = "" ;

  @SuppressWarnings("deprecation")

  public Clock(){
  add(l);
  l.setBounds(120, 320, 80, 20);
  l.setFont(f);
  add(display);
  display.setBounds(195, 320, 80, 20);
  display.setFont(f);
  display.setBorder(BorderFactory.createLineBorder(Color.black));
  add(display2);
  display2.setBounds(90, 350, 250, 20);
  display2.setFont(f);
  hour = now.getHours();
  min = now.getMinutes();
  sec = now.getSeconds();
  setVisible(true);
  }

  public void paintComponent(Graphics g1){

  double x,y;
  super.paintComponent(g1);
  g = (Graphics2D) g1;
  //反锯齿开关开
  g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

  //画表盘g.setPaint(new GradientPaint(5,40,Color.blue,15,50,Color.yellow,true));g.setStroke( new BasicStroke(3,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL));g.drawOval(75, 40, 250, 250);g.fillOval(195, 160, 10, 10);g.setColor(Color.black);//画60个点for(int i = 0;i < 60;i++){    double[] co = new double[2];    co = paint_Dot(i * 2 * PI / 60);    x = co[0];    y = co[1];    if(i == 0 || i == 15 || i == 30 || i == 45)//画3,6,9,12四个大点    {        g.fillOval((int)(x - 5 + 200),(int)(y - 5 + 165),10,10);    }    else//其他小点    {        g.fillOval((int)(x - 2.5 + 200),(int)(y - 2.5 + 165),5,5);    }}//画四个数字g.setFont(f2);g.drawString("3", 300, 171);g.drawString("6", 195, 273);g.drawString("9", 91, 171);g.drawString("12", 190, 68);//画时针，分针，秒针paint_HourPointer(hour*3600 + min*60 + sec,g);//时针走过的秒数paint_MinutePointer(min*60 + sec,g);//分针走过的秒数paint_SecondPointer(sec,g);//秒针走过的秒数

  }

  public void showUI(){

  new Thread() {

  public void paint_HourPointer(int second,Graphics2D g){//second表示当前时间的时针相对00:00:00走了多少秒

  double x,y,angle;
  angle = second PI / 21600;//时针的速度为PI/21600 (rad/s)
  x = 200 + 60 Math.sin(angle);
  y = 165 - 60 * Math.cos(angle);
  g.setStroke( new BasicStroke(5,BasicStroke.CAP_BUTT,BasicStroke.JOIN_ROUND));
  g.setPaint(new GradientPaint(200,165,Color.red,260,165,Color.blue,true));
  g.drawLine(200, 165, (int)x, (int)y);
  }

  public void paint_MinutePointer(int second,Graphics2D g){//second表示当前时间的分针相对00:00:00走了多少秒

  double x,y,angle;
  angle = second PI / 1800;//分针的速度为PI/1800 (rad/s)
  x = 200 + 80 Math.sin(angle);
  y = 165 - 80 * Math.cos(angle);
  g.setStroke( new BasicStroke(3,BasicStroke.CAP_BUTT,BasicStroke.JOIN_ROUND));
  g.setPaint(new GradientPaint(200,165,Color.magenta,280,165,Color.blue,true));
  g.drawLine(200, 165, (int)x, (int)y);
  }

  public void paint_SecondPointer(int second,Graphics2D g){//second表示当前时间的秒针相对00:00:00走了多少秒

  double x,y,x1,y1,x2,y2,x3,y3,angle;
  double cos = 90 / Math.sqrt(8125);//9090+55
  double sin = 5 / Math.sqrt(8125);
  angle = second PI / 30;//时针的速度为PI/30 (rad/s)
  x = 200 + 95 Math.sin(angle);
  y = 165 - 95 Math.cos(angle);
  x1 = 200 + 20 Math.sin(angle + PI);
  y1 = 165 - 20 Math.cos(angle + PI);
  x2 = 200 + Math.sqrt(8125) ( Math.sin(angle)cos - Math.cos(angle)sin ); //sin(a-b)
  y2 = 165 - Math.sqrt(8125) ( Math.cos(angle)cos + Math.sin(angle)sin ); //cos(a-b)
  x3 = 200 + Math.sqrt(8125) ( Math.sin(angle)cos + Math.cos(angle)sin ); //sin(a+b)
  y3 = 165 - Math.sqrt(8125) ( Math.cos(angle)cos - Math.sin(angle)*sin ); //cos(a+b)
  g.setStroke( new BasicStroke(2,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL));
  g.setPaint(new GradientPaint(180,165,Color.CYAN,295,165,Color.MAGENTA,true));
  g.drawLine((int)x1, (int)y1, (int)x, (int)y);
  g.drawLine((int)x2, (int)y2, (int)x, (int)y);
  g.drawLine((int)x3, (int)y3, (int)x, (int)y);
  }

  public double[] paint_Dot(double angle){

  double[] co = new double[2];
  co[0] = 115 Math.cos(angle);//横坐标
  co[1] = 115 Math.sin(angle);//纵坐标
  return co;
  }

  @SuppressWarnings("deprecation")

  private void showTime(){
  String date;
  int hour_temp = hour,min_temp = min,sec_temp = sec;
  sec_temp += 1 ;
  if(sec_temp >= 60)
  {
  sec_temp = 0;
  min_temp += 1 ;
  }
  if(min_temp>=60){
  min_temp=0;
  hour_temp+=1;
  }
  if(hour_temp < 10)
  strTime = "0" + hour_temp + ":";
  else
  strTime = "" + hour_temp + ":";

  if(min_temp < 10)    strTime = strTime + "0" + min_temp + ":";else    strTime = strTime + "" + min_temp + ":";if(sec < 10)    strTime = strTime + "0" + sec_temp;else    strTime = strTime + "" + sec_temp;//在窗体上设置显示时间date = " " + (now.getYear()+1900) + "年" + (now.getMonth()+1) + "月" + now.getDate() + "日   " + "星期" ;switch (now.getDay()) {case 1:    date += "一";    break;case 2:    date += "二";    break;case 3:    date += "三";    break;case 4:    date += "四";    break;case 5:    date += "五";    break;case 6:    date += "六";    break;case 7:    date += "日";    break;}date += "  CST";strTime = "  " + strTime; display.setText(strTime);display2.setText(date);

  }

  public static void main(String args[]){

  Clock c = new Clock();
  c.showUI();
  JFrame f = new JFrame("Clock By XJX");
  Image img=Toolkit.getDefaultToolkit().getImage("title.gif");//窗口图标
  f.setIconImage(img);
  f.setSize(400,400);
  f.setResizable(false);
  f.add(c, BorderLayout.CENTER);
  f.setLocationRelativeTo(null);
  f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  f.setVisible(true);
  }
  }