Lab 3A - Draw Two Ovals In this labwork are asked to write a GUI application using AWT. You are going to; • Write a AWTDemo class which will defined to be a subclass of Frame. • It is going to define the main program window. • A WindowListener should be defined as an anonymous inner class from WindowAdapter inside the constructor. It overrides the windowClosing method to terminate the program upon receiving the closing event for the window. • Set the title to "Lab 3A" in the constructor and add your WindowListener. • A method paint should draws two circles. First one of radius 50 and the second one of radius 100 with the method drawOval in the Graphics object. • The center of the circle is determined by the variables x and y, set different centers for each circle. • The main method should create and display an instance of AWTDemo(1). • The frame should be set to the size 500 by 500.

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Listing 1: AWTDemo Class Definition
import java.awt.*;
import java.awt.event.*;
public class AWTDemo extends Frame implements ActionListener {
int x = 100;
int y = 100;
public static void main(String(l args) {
ITWO types of constructors selected by the integer passed
IFirst one is for Lab3A second one is for Lab 3B
public AWTDemolint a) {
ifla == 1){
setTitle("Lab 3A");
else if la == 2) {
setTitle("Lab 3B");
Il create menu
Il end program when window is closed
Il mouse event handler
public void paint(Graphics g) {
public void actionPerformed(ActionEvent ev) {
Transcribed Image Text:Listing 1: AWTDemo Class Definition import java.awt.*; import java.awt.event.*; public class AWTDemo extends Frame implements ActionListener { int x = 100; int y = 100; public static void main(String(l args) { ITWO types of constructors selected by the integer passed IFirst one is for Lab3A second one is for Lab 3B public AWTDemolint a) { ifla == 1){ setTitle("Lab 3A"); else if la == 2) { setTitle("Lab 3B"); Il create menu Il end program when window is closed Il mouse event handler public void paint(Graphics g) { public void actionPerformed(ActionEvent ev) {
Lab 3A - Draw Two Ovals
In this labwork are asked to write a GUI application using AWT. You are going to;
• Write a AWTDemo class which will defined to be a subclass of Frame.
• It is going to define the main program window.
• A WindowListener should be defined as an anonymous inner class from WindowAdapter
inside the constructor. It overrides the windowClosing method to terminate the program
upon receiving the closing event for the window.
• Set the title to "Lab 3A" in the constructor and add your WindowListener.
• A method paint should draws two circles. First one of radius 50 and the second one of
radius 100 with the method drawOval in the Graphics object.
• The center of the circle is determined by the variables x and y, set different centers for
each circle.
• The main method should create and display an instance of AWTDemo(1).
• The frame should be set to the size 500 by 500.
Lab 3B - Move The Ovals
In this part of the lab you should implement a main window with a menu and two circles. You are
going add;
A menu that contains only one item, "Exit," which closes the window when selected.
• The menu in the frame is created with objects of the classes MenuBar, Menu, and
Menultem.
• When the "Exit" menu item is selected, the program exits by calling the method System.
exit(0).
• A graphical drawing that should respond to a mouse click by redrawing the figure at the
mouse location.
• The AWTDemo class should implement the Action Listener interface to process the
ActionEvent generated by menu selections.
• The actionPerformed method should be defined in the interface is the handler for the
events.
• Another listener should be created that is a MouseListener, derived from the
MouseAdapter class.
• The mouseClicked method is overridden to handle the mouse-click events. In the
mouseClicked method, the mouse location is saved to the variables x and y, and a call to
the repaint method is made to refresh the drawing and to move the figure to the new
location.
• The main method should create and display an instance of AWTDemo(2).
Transcribed Image Text:Lab 3A - Draw Two Ovals In this labwork are asked to write a GUI application using AWT. You are going to; • Write a AWTDemo class which will defined to be a subclass of Frame. • It is going to define the main program window. • A WindowListener should be defined as an anonymous inner class from WindowAdapter inside the constructor. It overrides the windowClosing method to terminate the program upon receiving the closing event for the window. • Set the title to "Lab 3A" in the constructor and add your WindowListener. • A method paint should draws two circles. First one of radius 50 and the second one of radius 100 with the method drawOval in the Graphics object. • The center of the circle is determined by the variables x and y, set different centers for each circle. • The main method should create and display an instance of AWTDemo(1). • The frame should be set to the size 500 by 500. Lab 3B - Move The Ovals In this part of the lab you should implement a main window with a menu and two circles. You are going add; A menu that contains only one item, "Exit," which closes the window when selected. • The menu in the frame is created with objects of the classes MenuBar, Menu, and Menultem. • When the "Exit" menu item is selected, the program exits by calling the method System. exit(0). • A graphical drawing that should respond to a mouse click by redrawing the figure at the mouse location. • The AWTDemo class should implement the Action Listener interface to process the ActionEvent generated by menu selections. • The actionPerformed method should be defined in the interface is the handler for the events. • Another listener should be created that is a MouseListener, derived from the MouseAdapter class. • The mouseClicked method is overridden to handle the mouse-click events. In the mouseClicked method, the mouse location is saved to the variables x and y, and a call to the repaint method is made to refresh the drawing and to move the figure to the new location. • The main method should create and display an instance of AWTDemo(2).
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