Digital Clock.java

// Java program to illustrate 
// digital clock using Applets 

import java.applet.Applet; 
import java.awt.*; 
import java.util.*; 

public class digitalClock extends Applet { 

	@Override
	public void init() 
	{ 
		// Applet window size 
		this.setSize(new Dimension(800, 400)); 
		setBackground(Color.white); 
		new Thread() { 
			@Override
			public void run() 
			{ 
				while (true) { 
					repaint(); 
					delayAnimation(); 
				} 
			} 
		}.start(); 
	} 

	// Animating the applet 
	private void delayAnimation() 
	{ 
		try { 

			// Animation delay is 1000 milliseconds 
			Thread.sleep(1000); 
		} 
		catch (InterruptedException e) { 
			e.printStackTrace(); 
		} 
	} 

	// Function that recieves segment combination value 
	// for each digit, position of the display 
	public void display(int val, int pos, Graphics g) 
	{ 

		// lit-up the i-th segment 

		// 0-th segment 
		if ((val & 1) != 0) 
			g.fillRect(pos, 150, 5, 50); 

		// 1-st segment 
		if ((val & 2) != 0) 
			g.fillRect(pos, 145, 50, 5); 

		// 2-nd segment 
		if ((val & 4) != 0) 
			g.fillRect(pos + 45, 150, 5, 50); 

		// 3-rd segment 
		if ((val & 8) != 0) 
			g.fillRect(pos + 45, 200, 5, 50); 

		// 4-th segment 
		if ((val & 16) != 0) 
			g.fillRect(pos, 250, 50, 5); 

		// 5-th segment 
		if ((val & 32) != 0) 
			g.fillRect(pos, 200, 5, 50); 

		// 6-th segment 
		if ((val & 64) != 0) 
			g.fillRect(pos + 5, 200, 40, 5); 
	} 

	// Paint the applet 
	@Override
	public void paint(Graphics g) 
	{ 
		// Combination values of different digits 
		int[] digits 
			= new int[] { 63, 12, 118, 
						94, 77, 91, 
						123, 14, 127, 
						95 }; 

		// Get the system time 
		Calendar time = Calendar.getInstance(); 

		int hour = time.get(Calendar.HOUR_OF_DAY); 
		int minute = time.get(Calendar.MINUTE); 
		int second = time.get(Calendar.SECOND); 

		// Deciding AM/PM 
		int am = 1; 
		if (hour > 12) { 
			hour -= 12; 
			am = 0; 
		} 

		// Display hour 

		// tens digit 
		display(digits[hour / 10], 150, g); 
		// units digit 
		display(digits[hour % 10], 225, g); 

		// Display minute 

		// tens digit 
		display(digits[minute / 10], 325, g); 
		// units digit 
		display(digits[minute % 10], 400, g); 

		// Display second 

		// tens digit 
		display(digits[second / 10], 500, g); 
		// units digit 
		display(digits[second % 10], 575, g); 

		// Display AM/PM 
		if (am == 1) 
			g.drawString("am", 650, 250); 
		else
			g.drawString("pm", 650, 250); 

		// Display ratio signs 
		g.fillRect(300, 175, 5, 5); 
		g.fillRect(300, 225, 5, 5); 

		g.fillRect(475, 175, 5, 5); 
		g.fillRect(475, 225, 5, 5); 
	} 
}