PR15

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package clgPracticals;
 
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
 
/**
 *
 * @author smit
 */
class MyFrame extends Frame implements Runnable {
 
    Thread t;
    int c, m = 1, x;
    Dimension d;
 
    MyFrame() {
        t = new Thread(this);
        setSize(500, 500);
        d = getSize();
        c = 0;
        x = 0;
        t.start();
        addWindowListener(new WindowAdapter() {
            public void windowActivated(WindowEvent we) {
                t.resume();
            }
 
            public void windowDeactivated(WindowEvent we) {
                t.suspend();
            }
 
            public void windowClosing(WindowEvent we) {
                dispose();
            }
        });
        setVisible(true);
    }
 
    public void run() {
        try {
            while (true) {
                Thread.sleep(100);
                repaint();
            }
        } catch (Exception a) {
        }
    }
 
    public void paint(Graphics g) {
        if (m == 1) {
 
            g.setColor(Color.darkGray);
            g.drawString("Hello", x, 250);
            x += 5;
            if (x >= d.width) {
                m = 0;
            }
        }
        if (m == 0) {
            g.setColor(Color.black);
            g.drawString("Hello", x, 250);
            x -= 5;
            if (x - 10 < 0) {
                m = 1;
            }
        }
    }
}
 
class PR15 {
 
    public static void main(String[] args) {
        MyFrame fr = new MyFrame();
    }
}