java实现的小时钟示例分享

//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();
 }

}