To Demonstrate Awt Buttons Program using Java | Internet Programming Lab Programs

Algorithm Steps:

Step 1: Write a html applet tag with code property set to the class name and comment it

Step 2: Import necessary packages and classes

Step 3: Define a class that extends applet and implements action listener

Step 4: Declare a string msg and three buttons, yes, no, and maybe

Step 5: In the init() method, do the following:

         i) Create the buttons

          ii) Add the buttons to the applet

          iii) Add action listener to the buttons

Step 6: In the actionPerformed() method, do the following:

         i) Get the action command of the event happened

         ii) If it is equal to yes, set the msg string that the user pressed yes button

        iii) Repeat i) and ii) for the other buttons with appropriate msg

        iv) Repaint the applet

Step 7: In the paint() method, display the msg string

Java Program To demonstrate Awt Buttons

import java.awt.*; import java.awt.event.*; import java.applet.*; public class ButtonApplet extends Applet implements ActionListener { String msg = ""; Button ok, cancel, reset; public void init() { ok = new Button("ok"); cancel = new Button("cancel"); reset = new Button("reset"); add(ok); add(cancel); add(reset); ok.addActionListener(this); cancel.addActionListener(this); reset.addActionListener(this); } public void actionPerformed(ActionEvent e) { String str = e.getActionCommand(); if(str.equals("ok")) msg = "You pressed ok"; else if(str.equals("cancel")) msg = "You pressed cancel"; else msg = "You pressed reset"; repaint(); } public void paint(Graphics g) { g.drawString(msg,5,125); } } //button.html

SAMPLE OUTPUT SCREEN:

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