File :: Clock.java
import java.awt.*;
import javax.swing.*;
import java.util.*;
public class Clock extends JPanel {
/**
*
*/
private static final long serialVersionUID = 1L;
private int hour;
private int minute;
private int second;
public Clock() {
setCurrentTime();
}
public Clock(int hour, int minute, int second) {
this.hour = hour;
this.minute = minute;
this.second = second;
}
public int getHour() {
return hour;
}
public void setHour(int hour) {
this.hour = hour;
repaint();
}
public int getMinute() {
return minute;
}
public void setMinute(int minute) {
this.minute = minute;
repaint();
}
public int getSecond() {
return second;
}
public void setSecond(int second) {
this.second = second;
repaint();
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
int clockRadius =
(int)(Math.min(getWidth(), getHeight()) * 0.8 * 0.5);
int xCenter = getWidth() / 2;
int yCenter = getHeight() / 2;
g.setColor(Color.black);
g.drawOval(xCenter - clockRadius, yCenter - clockRadius,
2 * clockRadius, 2 * clockRadius);
g.drawString("12", xCenter - 5, yCenter - clockRadius + 12);
g.drawString("9", xCenter - clockRadius + 3, yCenter + 5);
g.drawString("3", xCenter + clockRadius - 10, yCenter + 3);
g.drawString("6", xCenter - 3, yCenter + clockRadius - 3);
int sLength = (int)(clockRadius * 0.8);
int xSecond = (int)(xCenter + sLength *
Math.sin(second * (2 * Math.PI / 60)));
int ySecond = (int)(yCenter - sLength *
Math.cos(second * (2 * Math.PI / 60)));
g.setColor(Color.red);
g.drawLine(xCenter, yCenter, xSecond, ySecond);
int mLength = (int)(clockRadius * 0.65);
int xMinute = (int)(xCenter + mLength *
Math.sin(minute * (2 * Math.PI / 60)));
int yMinute = (int)(yCenter - mLength *
Math.cos(minute * (2 * Math.PI / 60)));
g.setColor(Color.blue);
g.drawLine(xCenter, yCenter, xMinute, yMinute);
int hLength = (int)(clockRadius * 0.5);
int xHour = (int)(xCenter + hLength *
Math.sin((hour % 12 + minute / 60.0) * (2 * Math.PI / 12)));
int yHour = (int)(yCenter - hLength *
Math.cos((hour % 12 + minute / 60.0) * (2 * Math.PI / 12)));
g.setColor(Color.green);
g.drawLine(xCenter, yCenter, xHour, yHour);
}
public void setCurrentTime() {
Calendar calendar = new GregorianCalendar();
this.hour = calendar.get(Calendar.HOUR_OF_DAY);
this.minute = calendar.get(Calendar.MINUTE);
this.second = calendar.get(Calendar.SECOND);
}
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
}
File :: MyClock.java
import java.awt.event.*;
import javax.swing.*;
public class MyClock extends Clock
implements ActionListener {
/**
*
*/
private static final long serialVersionUID = 1L;
protected Timer timer = new Timer(1000,this);
public MyClock(){
timer.start();
}
public void actionPerformed(ActionEvent e){
setCurrentTime();
repaint();
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
JFrame frame = new JFrame("MyClock");
MyClock clock = new MyClock();
frame.getContentPane().add(clock);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(200,200);
frame.setVisible(true);
}
}
ให้ นำ2 คลาสนี้ ไปรันดู (เลือก MainClass ด้วยนะ ถ้าจะทำเปนไฟล์ dot jar)
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