//package com.clock; import java.awt.BasicStroke; import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Insets; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.util.Calendar; import java.util.GregorianCalendar; import javax.swing.*; import javax.swing.JFrame; public class Clock extends JFrame implements ActionListener{  private final double  RAD=Math.PI/180;  public Clock(){   super("Clock");   setSize(400, 400);   setLocation(400, 200);   setVisible(true);   setResizable(true);   setBackground(Color.white);   addWindowListener(new WindowAdapter() {    @Override    public void windowClosing(WindowEvent e) {     System.exit(0);    }   });   ActionListener drawClock=new ActionListener() {    @Override    public void actionPerformed(ActionEvent e) {     repaint();    }   };   new Timer(1000,drawClock).start();  }  @Override  public void actionPerformed(ActionEvent e) {}  public void paint(Graphics g){   Graphics2D g2=(Graphics2D)g;   Insets insert=getInsets();   int h=getSize().height;   g2.setStroke(new BasicStroke(3.0f));   g.drawOval(40,40, h-80,h-80);   int r=200;   int R1=140;   int initRad=60;   for(int i=1;i<=5;i++){    int x0= (int) (r+R1*Math.cos(RAD*initRad));    int y0= (int) (r-R1*Math.sin(RAD*initRad));    g.setFont(new Font("楷体", Font.BOLD, 20));    g.drawString(""+i, x0, y0);    initRad-=30;    }   int R2=150;   int initRad2=-120;   for(int i=7;i<=11;i++){    int x0= (int) (r+R2*Math.cos(RAD*initRad2));    int y0= (int) (r-R2*Math.sin(RAD*initRad2));    g.setFont(new Font("楷体", Font.BOLD, 20));    g.drawString(""+i, x0, y0);    initRad2-=30;    }   g.drawString("6", 190, 350);   g.drawString("12", 190, 60);   Calendar now=new GregorianCalendar();   int hour=now.get(Calendar.HOUR_OF_DAY);   int minute=now.get(Calendar.MINUTE);   int second=now.get(Calendar.SECOND);   String time;   if(hour<10){time="0"+hour;}else{time=""+hour;}   if(minute<10){time+=":0"+minute;}else{time+=":"+minute;}   if(second<10){time+=":0"+second;}else{time+=":"+second;}   g.setColor(Color.WHITE);   g.fillRect(10, 30, 90, 28);   g.setColor(Color.red);   g.drawString(time, 10, 50);   int S=90-second*6;   int M=90-minute*6;   int H=90-hour*30-minute/2;      g2.setStroke(new BasicStroke(1.0f));   int x=(int) (200+130*Math.cos(RAD*S));   int y=(int) (200-130*Math.sin(RAD*S));   int SS=90-(second-1)*6;   int xx=(int) (200+130*Math.cos(RAD*SS));   int yy=(int) (200-130*Math.sin(RAD*SS));   g.setColor(getBackground());   g.drawLine(200, 200, xx, yy);   g.setColor(Color.black);   g.drawLine(200, 200, x, y);   g2.setStroke(new BasicStroke(2.2f));   int x1=(int) (200+110*Math.cos(RAD*M));   int y1=(int) (200-110*Math.sin(RAD*M));   int MM=90-(minute-1)*6;   int x11=(int) (200+110*Math.cos(RAD*MM));   int y11=(int) (200-110*Math.sin(RAD*MM));   g.setColor(getBackground());   g.drawLine(200, 200, x11, y11);   g.setColor(Color.blue);   g.drawLine(200, 200, x1, y1);   g2.setStroke(new BasicStroke(4.3f));   int xx1=(int) (200+90*Math.cos(RAD*H));   int yy1=(int) (200-90*Math.sin(RAD*H));   int HH=90-(hour-1)*30-minute/2;;   int xxx1=(int) (200+90*Math.cos(RAD*HH));   int yyy1=(int) (200-90*Math.sin(RAD*HH));   g.setColor(Color.white);   g.drawLine(200, 200, xxx1, yyy1);   g.setColor(Color.green);   g.drawLine(200, 200, xx1, yy1);  }  public static void main(String[] args) {   new Clock();  } }