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SAKET-SKSAKET-SK
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‎BouncingBall.java

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import java.awt.*;
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import javax.swing.*;
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public class BouncingBall extends JPanel {
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// Box height and width
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int width;
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int height;
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// Ball Size
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float radius = 40;
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float diameter = radius * 2;
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// Center of Call
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float X = radius + 50;
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float Y = radius + 20;
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// Direction
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float dx = 3;
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float dy = 3;
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public BouncingBall() {
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Thread thread = new Thread() {
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public void run() {
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while (true) {
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width = getWidth();
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height = getHeight();
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X = X + dx ;
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Y = Y + dy;
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if (X - radius < 0) {
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dx = -dx;
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X = radius;
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} else if (X + radius > width) {
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dx = -dx;
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X = width - radius;
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}
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if (Y - radius < 0) {
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dy = -dy;
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Y = radius;
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} else if (Y + radius > height) {
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dy = -dy;
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Y = height - radius;
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}
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repaint();
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try {
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Thread.sleep(50);
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} catch (InterruptedException ex) {
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}
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}
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}
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};
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thread.start();
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}
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public void paintComponent(Graphics g) {
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super.paintComponent(g);
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g.setColor(Color.YELLOW);
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g.fillOval((int)(X-radius), (int)(Y-radius), (int)diameter, (int)diameter);
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}
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public static void main(String[] args) {
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JFrame.setDefaultLookAndFeelDecorated(true);
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JFrame frame = new JFrame("Bouncing Ball");
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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frame.setSize(1000, 1000);
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frame.setContentPane(new BouncingBall());
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frame.setVisible(true);
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}
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}

‎Calculator.java

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import java.awt.BorderLayout;
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import java.awt.Container;
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import java.awt.GridLayout;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import java.awt.event.WindowAdapter;
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import java.awt.event.WindowEvent;
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import javax.swing.JButton;
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import javax.swing.JFrame;
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import javax.swing.JPanel;
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import javax.swing.JTextField;
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public class Calculator extends JPanel implements ActionListener {
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private JTextField display = new JTextField("0");
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private double result = 0;
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private String operator = "=";
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private boolean calculating = true;
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public Calculator() {
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setLayout(new BorderLayout());
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display.setEditable(false);
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add(display, "North");
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JPanel panel = new JPanel();
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panel.setLayout(new GridLayout(4, 4));
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String buttonLabels = "789/456*123-0.=+";
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for (int i = 0; i < buttonLabels.length(); i++) {
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JButton b = new JButton(buttonLabels.substring(i, i + 1));
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panel.add(b);
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b.addActionListener(this);
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}
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add(panel, "Center");
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}
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public void actionPerformed(ActionEvent evt) {
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String cmd = evt.getActionCommand();
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if ('0' <= cmd.charAt(0) && cmd.charAt(0) <= '9' || cmd.equals(".")) {
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if (calculating)
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display.setText(cmd);
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else
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display.setText(display.getText() + cmd);
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calculating = false;
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} else {
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if (calculating) {
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if (cmd.equals("-")) {
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display.setText(cmd);
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calculating = false;
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} else
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operator = cmd;
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} else {
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double x = Double.parseDouble(display.getText());
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calculate(x);
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operator = cmd;
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calculating = true;
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}
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}
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}
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private void calculate(double n) {
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if (operator.equals("+"))
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result += n;
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else if (operator.equals("-"))
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result -= n;
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else if (operator.equals("*"))
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result *= n;
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else if (operator.equals("/"))
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result /= n;
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else if (operator.equals("="))
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result = n;
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display.setText("" + result);
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}
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public static void main(String[] args) {
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JFrame.setDefaultLookAndFeelDecorated(true);
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JFrame frame = new JFrame();
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frame.setTitle("Calculator");
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frame.setSize(200, 200);
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frame.addWindowListener(new WindowAdapter() {
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public void windowClosing(WindowEvent e) {
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System.exit(0);
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}
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});
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Container contentPane = frame.getContentPane();
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contentPane.add(new Calculator());
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frame.show();
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}
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}
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‎CheckInternet.java

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package checkinternet;
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import java.net.*;
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public class CheckInternet
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{
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public static void main(String[] args)
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{
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try
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{
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URL url=new URL("https://google.com");
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URLConnection con=url.openConnection();
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con.connect();
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System.out.println("Internet Connection Available");
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}
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catch (Exception e)
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{
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System.out.println("No Internet Connection");
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}
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}
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}

‎ColorBars.java

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package colorbars;
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import java.applet.*;
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import java.awt.*;
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/* @author Saket*/
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public class ColorBars extends Applet
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{
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Color colors[]={Color.black,Color.BLUE,Color.cyan,Color.ORANGE,Color.gray,Color.red,Color.MAGENTA,Color.yellow,Color.pink};
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public void paint(Graphics g)
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{
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int deltax=260/colors.length;
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for(int i=0;i<colors.length;i++)
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{
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g.setColor(colors[i]);
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g.fillRect(i*deltax,0,(i+1)*deltax,260);
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}
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}
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}

‎Counter.java

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package counter;
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/*@author Saket*/
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import java.applet.*;
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import java.awt.*;
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public class Counter extends Applet implements Runnable
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{
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int count;
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Thread t;
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public void init()
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{
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count=0;
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t=new Thread(this);
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t.start();
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}
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public void run()
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{
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try
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{
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while(true)
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{
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repaint();
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Thread.sleep(1000);
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++count;
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}
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}
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catch(InterruptedException e)
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{
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e.printStackTrace();
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}
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}
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public void paint(Graphics g)
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{
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g.setFont(new Font("serif",Font.BOLD,36));
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FontMetrics fm=g.getFontMetrics();
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String str=" "+count;
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Dimension d=getSize();
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int x=d.width/2-fm.stringWidth(str)/2;
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g.drawString(str,x,d.height/2);
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}
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}

‎DigitalClock.java

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import java.awt.Font;
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import java.awt.Color;
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import java.awt.GridLayout;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import javax.swing.JFrame;
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import javax.swing.JLabel;
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import javax.swing.Timer;
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import javax.swing.SwingConstants;
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import java.util.*;
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import java.text.*;
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public class DigitalClock {
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public static void main(String[] arguments) {
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ClockLabel dateLable = new ClockLabel("date");
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ClockLabel timeLable = new ClockLabel("time");
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ClockLabel dayLable = new ClockLabel("day");
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JFrame.setDefaultLookAndFeelDecorated(true);
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JFrame f = new JFrame("Digital Clock");
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f.setSize(300,150);
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f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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f.setLayout(new GridLayout(3, 1));
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f.add(dateLable);
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f.add(timeLable);
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f.add(dayLable);
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f.setVisible(true);
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}
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}
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class ClockLabel extends JLabel implements ActionListener {
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String type;
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SimpleDateFormat sdf;
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public ClockLabel(String type) {
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this.type = type;
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setForeground(Color.black);
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switch (type) {
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case "date" : sdf = new SimpleDateFormat(" dd MM yy");
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setFont(new Font("chiller", Font.PLAIN, 20));
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setHorizontalAlignment(SwingConstants.LEFT);
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break;
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case "time" : sdf = new SimpleDateFormat("hh:mm:ss a");
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setFont(new Font("chiller", Font.PLAIN, 40));
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setHorizontalAlignment(SwingConstants.CENTER);
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break;
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case "day" : sdf = new SimpleDateFormat("EEEE ");
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setFont(new Font("chiller", Font.PLAIN, 30));
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setHorizontalAlignment(SwingConstants.RIGHT);
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break;
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default : sdf = new SimpleDateFormat();
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break;
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}
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Timer t = new Timer(1000, this);
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t.start();
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}
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public void actionPerformed(ActionEvent ae) {
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Date d = new Date();
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setText(sdf.format(d));
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}
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}
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