Design a frame in java with three buttons named RED, BLUE and GREEN. Write a code such that when RED button is clicked, text red is displayed and so on for other two

From Events, Handling Events and AWT/Swing chapter in PU/ Programming in Java

Asked on 21 Dec, 2022

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arjun adhikari on 21 Dec, 2022 Like 0 Dislike

Here is an example of how you can create a frame with three buttons in Java and display text when the buttons are clicked:

 

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

 

public class ButtonFrame extends JFrame {
  private JButton redButton;
  private JButton blueButton;
  private JButton greenButton;
  private JLabel label;

 

  public ButtonFrame() {
    // Set the frame title and layout
    setTitle("Button Test");
    setLayout(new FlowLayout());

 

    // Create the buttons
    redButton = new JButton("RED");
    blueButton = new JButton("BLUE");
    greenButton = new JButton("GREEN");

 

    // Add action listeners to the buttons
    redButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        label.setText("RED");
      }
    });
    blueButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        label.setText("BLUE");
      }
    });
    greenButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        label.setText("GREEN");
      }
    });

 

    // Create the label
    label = new JLabel("Press a button");

 

    // Add the buttons and label to the frame
    add(redButton);
    add(blueButton);
    add(greenButton);
    add(label);
  }
}

To run this code, you will need to create an instance of ButtonFrame and make it visible. Here is an example of how to do that:

ButtonFrame frame = new ButtonFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(300, 100); frame.setVisible(true);

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