Advanced Java Programming Practical 13
Question 1
Write a program to demonstrate the use of WindowAdapter class
WindowDemo.java
Java
import java.awt.*;
import java.awt.event.*;
public class WindowDemo extends Frame
{
Label l;
WindowDemo()
{
l=new Label();
l.setBounds(50,50,100,50);
add(l);
addWindowListener(new WindowAdapter() {
public void windowOpened(WindowEvent e)
{
l.setText("Window Opened");
}
public void windowClosing(WindowEvent e) {
l.setText("Window Closing");
}
public void windowClosed(WindowEvent e) {
l.setText("Window Closed");
}
public void windowActivated(WindowEvent e) {
l.setText("Window Activated");
}
public void windowDeactivated(WindowEvent e)
{
l.setText("Window Deactivated");
}
});
setLayout(null);
setTitle("Window Adapter Demo");
setSize(500,300);
setVisible(true);
}
public static void main(String args[])
{
WindowDemo wd=new WindowDemo();
}
}
Output
Question 2
Write a program to demonstrate the use of anonymous inner class
InnerDemo.java
Java
interface Student
{
int roll_no=65;
void show();
}
public class InnerDemo
{
public static void main(String args[])
{
Student s=new Student() {
public void show()
{
System.out.println("Student roll number is: "+roll_no);
}
};
s.show();
}
}
Output
Question 3
Write a program using MouseMotionAdapter class to implement only one method mouseDragged().
MouseDraggedDemo.java
Java
import java.awt.*;
import java.awt.event.*;
public class MouseDraggedDemo extends Frame
{
Label l;
MouseDraggedDemo()
{
l=new Label();
l.setBounds(50,50,100,50);
add(l);
addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent e) {
l.setText("Mouse Dragged");
}
});
setLayout(null);
setTitle("Mouse Adapter Demo");
setSize(500,300);
setVisible(true);
}
public static void main(String args[])
{
MouseDraggedDemo md=new MouseDraggedDemo();
}
}
Output
