Page 219 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

EXERCISE 118 : Create a container with controls with action

listeners and event handlers

Objectives

At the end of this exercise you shall be able to
• Develop Java programs to Create a container with controls with action listeners and event handlers.

Requirements

Tools/Materials
• PC/Laptop with Windows OS
• JDK Software
• Text Editor (Visual Studio/Sublime/Notepad)

Procedure

TASK 1: Creating a container with controls (CheckBox) using AWT in Java, along with action listeners
and event handlers

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class CheckboxExample {

public static void main(String[] args) {
Frame frame = new Frame(“Checkbox Example”);
Checkbox checkbox = new Checkbox(“Check me”);

checkbox.addItemListener(e -> {
System.out.println(“Checkbox state: “ + (checkbox.getState() ? “Checked” : “Unchecked”));
});

frame.add(checkbox);

frame.setSize(300, 150);
frame.setLayout(new FlowLayout());
frame.setVisible(true);
frame.addWindowListener(new java.awt.event.WindowAdapter() {

public void windowClosing(java.awt.event.WindowEvent windowEvent) {
System.exit(0);
}
});
}
}

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CITS : IT & ITES - Computer Software Application - Exercise 118