时钟JAVA窗口应用程序

JAVA应用程序――时钟程序界面如下，显示时间为当前电脑系统时间ClockFrame.java文件代码如下：import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.text.DateFormat;import java.util.GregorianCalendar;import java.util.Locale;import javax.swing.*;public class ClockFrame extends JFrame implements ActionListener {JLabel dateLabel;JLabel timeLabel;ClockPanel clockPanel;Graphics2D g;Timer myTimer;ClockFrame(String s){super(s); //窗口名setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);Container contentPane = getContentPane();contentPane.setLayout(new CardLayout(7,7));JPanel mainPanel = new JPanel(new BorderLayout(0,4));JPanel timeCardPanel = new JPanel(new CardLayout(10,10));JPanel timePanel = new JPanel();GregorianCalendar myCalendar = new GregorianCalendar();DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG,DateFormat.SHORT,Locale.PRC);timeLabel = new JLabel(dateFormat.format(myCalendar.getTime()));timeLabel.setFont(new Font("微软雅黑",Font.PLAIN,30));clockPanel = new ClockPanel();timePanel.add(timeLabel);timeCardPanel.add(timePanel);mainPanel.add(timeCardPanel,BorderLayout.SOUTH);mainPanel.add(clockPanel,BorderLayout.CENTER);contentPane.add(mainPanel);myTimer = new Timer(1000,this);myTimer.start();setSize(550,600);//setResizable(false); //禁止改变窗口大小setLocationRelativeTo(null); // 在屏幕中心弹出窗口setVisible(true);}public static void main(String args[]){ClockFrame myFrame = new ClockFrame("时钟");}public void actionPerformed(ActionEvent e) {if(e.getSource()==myTimer){GregorianCalendar myCalendar = new GregorianCalendar();DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG,DateFormat.SHORT,Locale.PRC);this.timeLabel.setText(dateFormat.format(myCalendar.getTime()));}}//时钟Panel类private class ClockPanel extends JPanel implements ActionListener{int radius;int xCenter,yCenter;Timer myTimer;ClockPanel(){super();myTimer = new Timer(1000,this);myTimer.start();}//重绘面板public void paintComponent(Graphics g){super.paintComponent(g);Graphics2D page = (Graphics2D)g;// 设置图形消除锯齿RenderingHints qualityHints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);qualityHints.put(RenderingHints.KEY_RENDERING,RenderingHints.VALUE_RENDER_QUALITY);page.setRenderingHints(qualityHints);xCenter=this.getWidth()/2;yCenter=this.getHeight()/2;radius = Math.min(this.getWidth(), this.getHeight())/3;Color c=new Color(82,86,89);//绘制表盘paintCircle(page,Color.GRAY,xCenter,yCenter,radius+15);paintCircle(page,Color.LIGHT_GRAY,xCenter,yCenter,radius);for(int i=0;i<360;i+=6){if(i%90==0)paintCircle(page,c,(int)(xCenter+(radius-7)*Math.cos(i*Math.PI/180)),(int)(yCenter+(radius-7)*Math.sin(i*Math.PI/180)),7);else if(i%30==0)paintCircle(page,c,(int)(xCenter+(radius-5)*Math.cos(i*Math.PI/180)),(int)(yCenter+(radius-5)*Math.sin(i*Math.PI/180)),5);else if(i%6==0)paintCircle(page,Color.GRAY,(int)(xCenter+(radius-2)*Math.cos(i*Math.PI/180)),(int)(yCenter+(radius-2)*Math.sin(i*Math.PI/180)),2);}//绘制指针paintPointer(page);paintCircle(page,c,xCenter,yCenter,5); //表中心}//绘制指针public void paintPointer(Graphics2D g){xCenter=this.getWidth()/2;yCenter=this.getHeight()/2;radius = Math.min(this.getWidth(), this.getHeight())/3;double angleHourIn,angleMinuteIn,angleSecondIn;double angleHour,angleMinute,angleSecond;angleHourIn=Math.acos(15/radius);angleMinuteIn=Math.acos(10/radius);angleSecondIn=Math.acos(7.5/radius);GregorianCalendar myCalendar = new GregorianCalendar();angleHour = (myCalendar.get(GregorianCalendar.HOUR)*30+myCalendar.get(GregorianCalendar.MINUTE)/2)*Math.PI/180;angleMinute =(myCalendar.get(GregorianCalendar.MINUTE)*6+myCalendar.get(GregorianCalendar.SECOND)/10)*Math.PI/180;angleSecond = (myCalendar.get(GregorianCalendar.SECOND)*6) *Math.PI/180;int[] xPointsHour = {(int)(xCenter+radius/3*Math.sin(angleHour)),(int)(xCenter+5*Math.sin(angleHour+angleHourIn)),(int)(xCenter+5*Math.sin(angleHour-angleHourIn))};int[] xPointsMinute ={(int)(xCenter+2*radius/3*Math.sin(angleMinute)),(int)(xCenter+5*Math.sin(angleMinute+angleMinuteIn)),(int)(xCenter+5*Math.sin(angleMinute-angleMinuteIn))};int[] xPointsSecond ={(int)(xCenter+8*radius/9*Math.sin(angleSecond)),(int)(xCenter+5*Math.sin(angleSecond+angleSecondIn)),(int)(xCenter+5*Math.sin(angleSecond- angleSecondIn))};int[] yPointsHour = {(int)(yCenter-radius/3*Math.cos(angleHour)),(int)(yCenter-5*Math.cos(angleHour+angleHourIn)),(int)(yCenter-5*Math.cos(angleHour-angleHourIn))};int[] yPointsMinute ={(int)(yCenter-2*radius/3*Math.cos(angleMinute)),(int)(yCenter-5*Math.cos(angleMinute+angleMinuteIn)),(int)(yCenter-5*Math.cos(angleMinute-angleMinuteIn))};int[] yPointsSecond = {(int)(yCenter-8*radius/9*Math.cos(angleSecond)),(int)(yCenter-5*Math.cos(angleSecond+angleSecondIn)),(int)(yCenter-5*Math.cos(angleSecond- angleSecondIn))};g.setColor(Color.GRAY);g.fillPolygon(xPointsSecond, yPointsSecond, 3);g.setColor(new Color(96,100,105));g.fillPolygon(xPointsMinute, yPointsMinute, 3);g.setColor(new Color(82,86,89));g.fillPolygon(xPointsHour, yPointsHour, 3);}//绘制圆private void paintCircle(Graphics2D g,Color c,int x,int y,int radius){g.setColor(c);g.fillOval(x-radius, y-radius, radius*2, radius*2);}public void actionPerformed(ActionEvent e) {if(e.getSource()==myTimer){repaint();}}}}。