Real time digital clock in java. Digital clock using java. Java code to make real time digital clock

LiveDigitalClock.java

import java.awt.Font;
import java.text.DecimalFormat;

import javax.swing.JFrame;
import javax.swing.JLabel;

public class LiveDigitalClock {
	public static JLabel label;
	public static int hours = 00, minutes = 00, seconds = 00;
	
	public static void ticking(){
		seconds++;
		if(seconds >= 60){
			minutes++;
			seconds = 00;
			if(minutes >= 60){
				hours++;
				minutes = 00;
				if(hours >= 24){
					hours = 00;
				}
			}
		}
	}
	
	public static void main(String args[]) {
		Runnable run = new Runnable() {
			@Override
			public void run() {
				try {
					displayClock();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		};
		Thread thread = new Thread(run);
		thread.start();
	}
	
	public static void startClock() throws Exception{
		while(true) {
			ticking();
			String time = clockFormat(hours, minutes, seconds);
			label.setText(time);
			Thread.sleep(999);
		}
	}
	
	public static String clockFormat(int hours, int minutes, int seconds) {
		DecimalFormat formatter = new DecimalFormat("00");
		return formatter.format(hours) + ":" + formatter.format(minutes) + ":" + formatter.format(seconds);
	}
	
	public static void displayClock() throws Exception{
		JFrame frame = new JFrame();
		frame.setTitle("Java Clock");
		frame.setBounds(500, 300, 258, 110);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().setLayout(null);
		
		label = new JLabel("00:00:00");
		label.setFont(new Font(label.getFont().getName(), Font.PLAIN, 60));
		label.setBounds(5, 3, 250, 60);
		
		frame.getContentPane().add(label);
		frame.setVisible(true);
		startClock();
	}
}