Clock.java

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);