Java Swing Program to demonstrate JButton Action TextField

Program

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.*;
import java.awt.event.*;
public class JButtonActionTextBox{
    public static void main(String[] args) {
        JFrame frm = new JFrame("JButton Action Listener");
        JPanel pnl = new JPanel();
        JTextField txtDisplay = new JTextField(20);
        txtDisplay.setBounds(50, 50, 150, 20);
        JButton btnSubmit = new JButton("Click Here");
        btnSubmit.setBounds(50, 200, 100, 20);
        btnSubmit.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                txtDisplay.setText("Welcome to www.oodlescoop.com");
            }
        });
        pnl.add(txtDisplay);
        pnl.add(btnSubmit);
        frm.add(pnl);
        frm.setSize(300, 300);
        frm.setVisible(true);
        frm.setLayout(null);
        frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

This Java Swing program demonstrates the use of a JButton with an ActionListener to perform an action on a JTextField. Here's a brief explanation:

1. JFrame Setup:

   • A JFrame named frm is created with the title "JButton Action Listener."
   • The JFrame is set to close the application when the window is closed using setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE).

2. JPanel:

   • A JPanel named pnl is added to the frame to hold the components.

3. JTextField:

   • A JTextField named txtDisplay is created with a width of 20 columns for text input/display.
   • Its bounds are set using setBounds, though this is unnecessary since the program uses JPanel (which uses a default layout manager).

4. JButton:

   • A JButton named btnSubmit is created with the label "Click Here."
   • An ActionListener is added to the button using addActionListener. When the button is clicked, the txtDisplay text is updated to display the message "Welcome to www.oodlescoop.com".

5. Adding Components:

   • Both the txtDisplay and btnSubmit components are added to the JPanel.
   • The JPanel is then added to the JFrame.

6. Display Settings:

   • The JFrame size is set to 300x300.
   • The JFrame is made visible with setVisible(true).

Output