java实现模拟时钟表盘

  设计并实现一个模拟时钟功能的应用程序。程序中应显示时针、分针和秒针，并同时以数字形式显示当前时间。

实现结果：

源代码如下：

//ClockPanel.javaimport javax.swing.*;import java.util.Calendar; import java.util.GregorianCalendar; import java.util.Timer; import java.util.TimerTask; import java.text.SimpleDateFormat;import java.util.Locale; import java.awt.*;import java.awt.event.*;public class ClockPanel extends JPanel{private GregorianCalendar calendar;private JButton btn;private JButton btn2;private int currentState=8; private String zone;private int hourTemp;final int X=320, Y=240, R=120; // 圆心坐标，半径private int xPos,yPos;private int hour,minute,second; private int xHour,yHour,xMinute,yMinute,xSecond,ySecond;//表针位置（大端）private int xHour1,yHour1,xMinute1,yMinute1,xSecond1,ySecond1;//表针位置（小端）private double a_sec,a_min ,a_hour;//角度ClockPanel() { // 创建定时器对象Timer t = new Timer(); Task task = new Task(); t.schedule(task, 0, 1000); setLayout(new BorderLayout(10,20)); btn=new JButton("时区 上");btn2=new JButton("时区 下");btn.setBorder(BorderFactory.createRaisedBevelBorder());btn2.setBorder(BorderFactory.createRaisedBevelBorder());btn.setBackground(Color.green);btn2.setBackground(Color.green);btn.addActionListener(new ButtonListener()); btn2.addActionListener(new ButtonListener()); add(btn,BorderLayout.WEST); add(btn2,BorderLayout.EAST); }//相关事件处理private class ButtonListener implements ActionListener {public void actionPerformed(ActionEvent event) { if (event.getSource()==btn)currentState++;if (event.getSource()==btn2)currentState--;}}public void paintComponent(Graphics g){ super.paintComponent(g); double alfa; //所画点对应的角度Graphics2D g2d=(Graphics2D)g;BasicStroke bstroke=new BasicStroke(1.0f);BasicStroke bstroke2=new BasicStroke(2.0f);BasicStroke bstroke3=new BasicStroke(3.0f);g2d.setStroke(bstroke2);for(int i=0;i<=360;i+=6) {alfa=Math.toRadians(i); //角度用弧度表示xPos=X+(int)(R*Math.cos(alfa)); // x坐标yPos=Y-(int)(R*Math.sin(alfa)); // y坐标int xBegin=320+(int)(144*Math.sin(alfa));int yBegin=240-(int)(144*Math.cos(alfa));int xEnd=320+(int)(159*Math.sin(alfa));int yEnd=240-(int)(159*Math.cos(alfa));g2d.setColor(Color.BLACK);g2d.drawLine(xBegin,yBegin,xEnd,yEnd);g2d.setColor(Color.RED);switch(i){ // 写时钟数字刻度case 0: g2d.drawString("3", xPos,yPos);break;case 90: g2d.drawString("12", xPos,yPos);break;case 180: g2d.drawString("9", xPos,yPos);break;case 270: g2d.drawString("6",xPos,yPos);break;}if(i%30==0){g2d.drawLine(xBegin,yBegin,xEnd,yEnd);}}g2d.setColor(Color.BLACK);g2d.setStroke(bstroke3);g2d.drawLine(X, Y, xHour,yHour); // 画时针g2d.drawLine(X, Y, xHour1,yHour1); g2d.setColor(Color.BLUE);g2d.setStroke(bstroke2);g2d.drawLine(X, Y, xMinute,yMinute); // 画分针g2d.drawLine(X, Y, xMinute1,yMinute1);g2d.setColor(Color.RED);g2d.setStroke(bstroke);g2d.drawLine(X, Y, xSecond,ySecond); // 画秒针g2d.drawLine(X, Y, xSecond1,ySecond1);//表盘中心点1g2d.drawOval(317,237,6,6); g2d.fillOval(317,237,6,6);//表盘中心点2g2d.setColor(Color.BLACK);g2d.drawOval(319,238,4,4); g2d.fillOval(319,238,4,4);//表盘中心圆环g2d.setColor(Color.ORANGE);g2d.drawOval(300,220,40,40); g2d.setColor(Color.black);g2d.drawString("15010140079",290,376); GregorianCalendar gre=new GregorianCalendar(); SimpleDateFormat dateforamt1=new SimpleDateFormat("yyyy年MM月dd日E");//SimpleDateFormat dateforamt2=new SimpleDateFormat("H时m分s秒");g2d.setColor(Color.black);g2d.setFont(new Font("SAN_SERIF",Font.BOLD,20)); g2d.drawString(dateforamt1.format(gre.getTime()),250,50);g2d.drawString(hour+"时"+minute+"分"+second+"秒",260,430);//时区判断if(currentState>12){currentState=-11;}else if(currentState<-11){currentState=12;}if(currentState<=12&&currentState>=1)zone="东"+currentState+"区";elsezone="西"+(1-currentState)+"区";g2d.drawString(zone,170,50); }class Task extends TimerTask { public void run() { calendar = new GregorianCalendar(); hourTemp=currentState>0?(currentState-8):(currentState-1);hour = calendar.get(Calendar.HOUR)+hourTemp; minute = calendar.get(Calendar.MINUTE); second = calendar.get(Calendar.SECOND); a_sec = second * 2 * Math.PI / 60;a_min = minute * 2 * Math.PI / 60 + a_sec / 60;a_hour = hour * 2 * Math.PI / 12 + a_min / 12;// 计算时、分、秒针的末端位置xSecond=320+(int)(110*Math.sin(a_sec));ySecond=240-(int)(110*Math.cos(a_sec));xMinute=320+(int)(90 *Math.sin(a_min));yMinute=240-(int)(90 *Math.cos(a_min));xHour= 320+(int)(70 *Math.sin(a_hour));yHour= 240-(int)(70 *Math.cos(a_hour));xSecond1=320-(int)(22*Math.sin(a_sec));ySecond1=240+(int)(22*Math.cos(a_sec));xMinute1=320-(int)(15*Math.sin(a_min));yMinute1=240+(int)(15*Math.cos(a_min));xHour1 =320-(int)(5 *Math.sin(a_hour));yHour1 =240+(int)(5 *Math.cos(a_hour));repaint(); } } }////Clock.javaimport javax.swing.*;public class Clock{public static void main(String[] args) {JFrame frame=new JFrame("Clock"); //创建图文框frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.getContentPane().add(new ClockPanel()); //添加面板frame.setVisible(true);frame.setSize(640,480); }}

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