Key Events

Key Events

// Demonstrate some virtual key codes.
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
<applet code="KeyEvents" width=300 height=100>
</applet>
*/
public class KeyEvents extends Applet
implements KeyListener {
String msg = "";
int X = 10, Y = 20; // output coordinates
public void init() {
addKeyListener(this);
requestFocus(); // request input focus
}
public void keyPressed(KeyEvent ke) {
showStatus("Key Down");
int key = ke.getKeyCode();
switch(key) {
case KeyEvent.VK_F1:
msg += "<F1>";
break;
case KeyEvent.VK_F2:
msg += "<F2>";
break;
case KeyEvent.VK_F3:
msg += "<F3>";
break;
case KeyEvent.VK_PAGE_DOWN:
msg += "<PgDn>";
break;
case KeyEvent.VK_PAGE_UP:
msg += "<PgUp>";
break;
case KeyEvent.VK_LEFT:
msg += "<Left Arrow>";
break;
case KeyEvent.VK_RIGHT:
msg += "<Right Arrow>";
break;
}
repaint();
}
public void keyReleased(KeyEvent ke) {
showStatus("Key Up");
}
public void keyTyped(KeyEvent ke) {
msg += ke.getKeyChar();
repaint();
}
// Display keystrokes.
public void paint(Graphics g) {
g.drawString(msg, X, Y);
}
}

Mouse Events

Mouse Events

import java.awt.*;

import java.awt.event.*;

import java.applet.*;

/*

<applet code="MouseEvents" width=300 height=100>

</applet>

*/

public class MouseEvents extends Applet

implements MouseListener, MouseMotionListener

 {

String msg = "";

int mouseX = 0, mouseY = 0;

 // coordinates of mouse

public void init()

 {

addMouseListener(this);

addMouseMotionListener(this);

}

// Handle mouse clicked.

public void mouseClicked(MouseEvent me) 

{

// save coordinates

mouseX = 0;

mouseY = 10;

msg = "Mouse clicked.";

repaint();

}

// Handle mouse entered.

public void mouseEntered(MouseEvent me) {

// save coordinates

mouseX = 0;

mouseY = 10;

msg = "Mouse entered.";

repaint();

}

// Handle mouse exited.

public void mouseExited(MouseEvent me) {

// save coordinates

mouseX = 0;

mouseY = 10;

msg = "Mouse exited.";

repaint();

}

// Handle button pressed.

public void mousePressed(MouseEvent me) {

// save coordinates

mouseX = me.getX();

mouseY = me.getY();

msg = "Down";

repaint();

}

// Handle button released.

public void mouseReleased(MouseEvent me) {

// save coordinates

mouseX = me.getX();

mouseY = me.getY();

msg = "Up";

repaint();

}

// Handle mouse dragged.

public void mouseDragged(MouseEvent me) {

// save coordinates

mouseX = me.getX();

mouseY = me.getY();

msg = "*";

showStatus("Dragging mouse at " + mouseX + ", " + mouseY);

repaint();

}

// Handle mouse moved.

public void mouseMoved(MouseEvent me) 

{

// show status

showStatus("Moving mouse at " + me.getX() + ", " + me.getY());

}

// Display msg in applet window at current X,Y location.

public void paint(Graphics g) {

g.drawString(msg, mouseX, mouseY);

}

}

MY VIEW