java实现时钟表盘
本文实例为大家分享了java实现时钟表盘的具体代码,供大家参考,具体内容如下
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.java import 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1 g2d.drawOval(317,237,6,6); g2d.fillOval(317,237,6,6); //表盘中心点2 g2d.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&¤tState>=1) zone="东"+currentState+"区"; else zone="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.java import 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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