package thinking;
import java.awt.*;
import javax.swing.*;
import java.util.*;
public class My extends JFrame{
public My(){
StillClock clock = new StillClock();
MessagePanel messagePanel = new MessagePanel("" + clock.getHour() + ":" +
clock.getMinute() + ":" + clock.getSecond());
messagePanel.setCenter(true);
messagePanel.setForeground(Color.blue);
messagePanel.setFont(new Font("Courier",Font.BOLD,16));
setLayout(new GridLayout(0,1,5,5));
add(messagePanel);
add(clock);
}
public static void main(String[] args){
My frame = new My();
frame.setTitle("DisplayClock");
frame.setSize(500,500);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
class MessagePanel extends JPanel{
private String message = "welcome to Java!";
private boolean centered;
private int xCoodinate = 20;
private int yCoodinate = 20;
public MessagePanel(){
}
public MessagePanel(String message){
this.message = message;
}
public String getMessage(){
return message;
}
public void setMessage(String message){
this.message = message;
repaint();
}
public boolean isCenter(){
return centered;
}
public void setCenter(boolean centered){
this.centered = centered;
}
protected void paintComponent(Graphics g){
super.paintComponent(g);
if(centered){
FontMetrics fm = g.getFontMetrics();
int stringWidth = fm.stringWidth(message);
int stringAscent = fm.getAscent();
xCoodinate = getWidth()/2 - stringWidth/2;
yCoodinate = getHeight()/2 - stringAscent/2;
}
g.drawString(message, xCoodinate, yCoodinate);
}
}
class StillClock extends JPanel{
private int hour;
private int minute;
private int second;
public StillClock(){
setCurrentTime();
}
public StillClock(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 * (2 * Math.PI/60)));
int yHour = (int)(yCenter - hLength * Math.cos(hour * (2 * Math.PI/60)));
g.setColor(Color.BLACK);
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);
}
}
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