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);
}
}以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
