KeyMovement

import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;

public class Movement extends Frame implements KeyListener {

	int x = 41;
	int y = 51;

	public Movement() {
		addKeyListener(this);// adding key listener for arrow keys
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent we) {
				System.exit(0);
			}
		});
		setTitle("Basic Arrow Key Movement");
		setSize(500, 500);

	}

	public void paint(Graphics g) {
		g.drawString("x=" + x + ", y=" + y, 40, 50);
		g.drawRect(40, 50, 400, 400);
		g.setColor(Color.cyan);
		g.fillRect(x, y, 50, 30);

	}

	public void keyPressed(KeyEvent e) {
		int code = e.getKeyCode();

		switch (code) {
		case KeyEvent.VK_UP:
			// condition to keep movement inside the box
			if (y > 51)
				// adjust y coordinate by 1
				y -= 5;
			break;
		case KeyEvent.VK_DOWN:
			if (y < 420)
				y += 5;
			break;
		case KeyEvent.VK_LEFT:
			if (x > 41)
				x -= 5;
			break;
		case KeyEvent.VK_RIGHT:
			if (x < 390)
			x += 5;
			break;
		}
		// redraw the screen
		repaint();
	}

	public void keyReleased(KeyEvent arg0) {
	}

	public void keyTyped(KeyEvent arg0) {
	}
	
	public static void main (String[] args) {
		JFrame j = new JFrame();
		Movement m = new Movement();
		j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		j.pack();
		m.setVisible(true);
		
	}

}