Question

Write a watch java program​

Answer 1

import javax.swing.*;

import java.awt.*;

import java.text.*;

import java.util.*;

public class DigitalWatch implements Runnable{

JFrame f;

Thread t=null;

int hours=0, minutes=0, seconds=0;

String timeString = "";

JButton b;

DigitalWatch(){

f=new JFrame();

t = new Thread(this);

t.start();

b=new JButton();

b.setBounds(100,100,100,50);

f.add(b);

f.setSize(300,400);

f.setLayout(null);

f.setVisible(true);

}

public void run() {

try {

while (true) {

Calendar cal = Calendar.getInstance();

hours = cal.get( Calendar.HOUR_OF_DAY );

if ( hours > 12 ) hours -= 12;

minutes = cal.get( Calendar.MINUTE );

seconds = cal.get( Calendar.SECOND );

SimpleDateFormat formatter = new SimpleDateFormat("hh:mm:ss");

Date date = cal.getTime();

timeString = formatter.format( date );

printTime();

t.sleep( 1000 ); // interval given in milliseconds

}

}

catch (Exception e) { }

}

public void printTime(){

b.setText(timeString);

}

public static void main(String[] args) {

new DigitalWatch();

}

}

Step-by-step explanation: