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JFrame Close Button

JFrame Close Button

(OP)
Hi, I am new to Java. Better yet I'm new to programming PERIOD.

I have to write my Hello World program for my class and have it exit with an "Exit" button.

I cannot get it to work properly.

Can someone please help!!!!

This is what I have. It runs smoothly just cannot figure out how to add the button.

import javax.swing.*;

public class HelloWorldGUI

{

private static void createAndShowGUI() {

JFrame frame = new JFrame("");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JLabel label = new JLabel("Hello World!!!");

frame.getContentPane().add(label);

frame.pack();

frame.setVisible(true);

}

public static void main(String[] args) {

createAndShowGUI();
}

}

RE: JFrame Close Button

Hi

That is simple : add a JButton which listens for ActionEvents handled by your class, ( for this your class will have to implement ActionListener, ) then in actionPerformed() method you just dispatch a WINDOW_CLOSING event.

If you want to keep the current JLabel too, add a layout manager of your choice which will make possible arranging multiple widgets the way you want.

CODE --> HelloWorldGUI.java

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

public class HelloWorldGUI implements ActionListener {
    JFrame frame;

    private void createAndShowGUI()
    {
        JLabel label = new JLabel("Hello World!!!");
        JButton button = new JButton("Run, Forrest, run !!!");

        button.addActionListener(this);

        frame = new JFrame("");
        frame.setContentPane(new JPanel(new FlowLayout()));
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.getContentPane().add(label);
        frame.getContentPane().add(button);
        frame.pack();

        frame.setVisible(true);
    }

    public void actionPerformed(ActionEvent e)
    {
        frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
    }

    public static void main(String[] args)
    {
        new HelloWorldGUI().createAndShowGUI();
    }

} 

Feherke.
feherke.ga

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