用Java编写的模仿电子钟系统

第一步：设置面板内容及数据

package  time;
import  java.awt.*;
import  java.awt.geom.Ellipse2D;
import  java.awt.geom.Line2D;
import  java.awt.geom.Point2D;
import  java.text.SimpleDateFormat;
import  java.util.Calendar;
import  java.util.Date;
import  javax.swing.JPanel;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-7-18
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:ClockPanelClass 设置面板内容及数据
 */
public  class  ClockPanelClass  extends  JPanel  implements  Runnable
{
    private  double  radius= 100 ; //半径100
    private  double  minutes;
    private  double  second;
    private  double  hours;
    private  double  minute_hand_length= 0.7 *radius;
    private  double  hour_hand_length= 0.5 *radius;
    private  double  second_hand_length= 0.9 *radius;
    private  String weekString,dayString;
    private  int  week,day,year,month;
    //@Override 画出时钟模型
    public  void  paintComponent(Graphics g) {
                Calendar now=Calendar.getInstance();
                minutes=now.get(Calendar.MINUTE);
                hours=now.get(Calendar.HOUR);
                second=now.get(Calendar.SECOND);
                day=now.get(Calendar.DAY_OF_MONTH);
                week=now.get(Calendar.DAY_OF_WEEK);
        super .paintComponent(g);
        Graphics2D g2=(Graphics2D)g;
        Ellipse2D circle= new  Ellipse2D.Double( 15 , 20 , 2 *radius, 2 *radius);
                g2.setColor(Color.ORANGE); //外边的圈圈的橙色
        g2.draw(circle);

                g2.setStroke( new  BasicStroke( 4 ,BasicStroke.JOIN_ROUND,BasicStroke.CAP_ROUND));
                g2.setColor(Color.BLUE);    //小点点是蓝色
        double  hourAngle=Math.toRadians( 90 - 360 *(hours/ 12 +minutes/ 720 ));
        drawHand(g2,hourAngle,hour_hand_length);
                g2.setColor(Color.red); //分钟是红色
                g2.setStroke( new  BasicStroke( 3 ,BasicStroke.JOIN_ROUND,BasicStroke.CAP_ROUND));
        double  minuteAngle=Math.toRadians( 90 - 360 *(minutes/ 60 +second/ 3600 ));
        drawHand(g2,minuteAngle,minute_hand_length);
                g2.setStroke( new  BasicStroke( 2 ,BasicStroke.JOIN_ROUND,BasicStroke.CAP_ROUND));
                g2.setColor(Color.gray); //秒钟
        double  secondAngle=Math.toRadians( 90 - 360 *second/ 60 );
        drawHand(g2,secondAngle,second_hand_length);
                g2.setColor(Color.BLUE); //时钟
                for ( int  i= 0 ;i< 12 ;i++){
                    g2.setStroke( new  BasicStroke( 3 ,BasicStroke.JOIN_ROUND,BasicStroke.CAP_ROUND));
                    g2.drawLine(( int )( 115 + 100 *Math.sin( 30 / 180.0 *i*Math.PI)),( int )( 120 + 100 *Math.cos( 30 / 180.0 *i*Math.PI)),
                            ( int )( 117 + 100 *Math.sin( 30 / 180.0 *i*Math.PI)),( int )( 122 + 100 *Math.cos( 30 / 180.0 *i*Math.PI)));
                }
                g2.setStroke( new  BasicStroke( 2 ,BasicStroke.JOIN_ROUND,BasicStroke.CAP_ROUND));
                for ( int  i= 0 ;i< 60 ;i++){
                    g2.drawLine(( int )( 115 + 100 *Math.sin( 6 / 180.0 *i*Math.PI)),( int )( 120 + 100 *Math.cos( 6 / 180.0 *i*Math.PI)),
                            ( int )( 115 + 100 *Math.sin( 6 / 180.0 *i*Math.PI)),( int )( 120 + 100 *Math.cos( 6 / 180.0 *i*Math.PI)));
                }
                g2.setColor(Color.black); //设置12 3 6 9的数字颜色
                g2.setFont( new  Font( "" ,Font.BOLD, 10 ));
                g2.drawString( "12" , 108 , 38 );
                g2.drawString( "3" , 205 , 126 );
                g2.drawString( "6" , 112 , 215 );
                g2.drawString( "9" , 22 , 126 );
                g2.setColor(Color.red); //日期和星期
                g2.setFont( new  Font( "黑体" ,Font.BOLD, 15 ));
                g2.drawString( " " +dayString,  67 ,  255 );
                g2.drawString( " " + "星期" +weekString,  77 ,  285 );
                g2.setColor(Color.black); //数字时钟
                SimpleDateFormat dateFormat =  new  SimpleDateFormat( "HH:mm:ss" );
                String rtime = dateFormat.format( new  Date()).toString();
                g2.drawString(rtime, 76 , 315 );
    }
    public  void  drawHand(Graphics2D g2, double  angle, double  handLength){
        Point2D end= new  Point2D.Double(radius+ 10 +handLength*Math.cos(angle),radius+ 20 -handLength*Math.sin(angle));
        Point2D center= new  Point2D.Double(radius+ 10 ,radius+ 20 );
        g2.draw( new  Line2D.Double(center,end));
    }

    //设置数字时间
    public  void  setTime(){
             Calendar c = Calendar.getInstance();
             hours=c.get(Calendar.HOUR);
             minutes=hours* 60 +c.get(Calendar.MINUTE);
             second=minutes* 60 +c.get(Calendar.SECOND);
            week=c.get(Calendar.DAY_OF_WEEK);
            year=c.get(Calendar.YEAR);
            month=c.get(Calendar.MONTH)+ 1 ;
            day=c.get(Calendar.DAY_OF_MONTH);
            dayString=year+ "-" +month+ "-" +day;
            switch (week){
                case  1 :{
                    weekString= "日" ;
                    break ;
                }
                case  2 :{
                    weekString= "一" ;
                    break ;
                }
                case  3 :{
                    weekString= "二" ;
                    break ;
                }
                case  4 :{
                    weekString= "三" ;
                    break ;
                }
                case  5 :{
                    weekString= "四" ;
                    break ;
                }
                case  6 :{
                    weekString= "五" ;
                    break ;
                }
                case  7 :{
                    weekString= "六" ;
                    break ;
                }
                default :
                    break ;
            }
             repaint();
    }
   // @Override
        public  void  run(){
            for (;;){
                sleep1();
            }
        }
//线程一秒钟，秒钟动一次
    public  void  sleep1(){
        try {
            Thread.sleep( 1000 );
            setTime();
        }
        catch (InterruptedException e){
        }
    }
}

第二步：设置面板属性

package  time;
import  java.awt.BorderLayout;
import  java.awt.Color;
import  java.awt.Font;
import  java.awt.Image;
import  java.awt.Toolkit;
import  java.net.URL;
import  javax.swing.JFrame;
import  javax.swing.UIManager;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-7-18
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:JTextFieldFrameClass 设置面板属性
 */
class  JTextFieldFrameClass  extends  JFrame {
        /**
     *
     */
    private  static  final  long  serialVersionUID = 1L;
        ClockPanelClass clock;
    public  JTextFieldFrameClass(){
        super ( "时钟" );
        setSize( 240 , 370 );
        clock= new  ClockPanelClass();
        //设置clock在面板的中间显示
        getContentPane().add(clock,BorderLayout.CENTER);
        this .setColor.RED);
         //设置居中显示
        this .setLocationRelativeTo( null );
       //修改java左上角的图标
        URL url =  this .getClass().getResource( "clock.png" );
        Image img = Toolkit.getDefaultToolkit().getImage(url);
        this .setIconImage(img);
        //设置面板可见
        setVisible( true );
        //设置不可变大
        setResizable( false );
        }

}

第三步：main主函数调用写好的方法

package  time;
import  javax.swing.JFrame;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-7-18
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:Test2 main主函数
 */
class  ColockMain {
    public  static  void  main(String []args){
            JTextFieldFrameClass frame= new  JTextFieldFrameClass();
            Thread tt= new  Thread(frame.clock);
            tt.start();
            //关闭窗口，退出应用！
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

第四步：展示

第五步：当然如果你觉得好，请入群：160243674 Java程序猿联盟，共同分享共同进步！

需要源码可以联系我！

本文转自 小夜的传说 51CTO博客，原文链接：http://blog.51cto.com/1936625305/1263394，如需转载请自行联系原作者