Thread: Adding JPanel to JFrame

Hello there

I'm creating a calculator, but I'm stuck at the GUI. My problem is, i want to add the JPanel "Buttons" to the JFrame in the class "Panel".
The thought was, that "Buttons" would represent a 3x3 matrix of buttons.
"Buttons" should then be added to "Panel" together with "textWindow" in a borderLayout. The GUI is not working the way i want it to, and is not displaying anything.

Class Panel

package gui;
 
import java.awt.BorderLayout;
 
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
 
public final class Panel 
extends JFrame {
 
	private static final long serialVersionUID = 1L;
 
	public static final Panel frame = new Panel();
 
 
 
	public Panel() {
		super();
		setTitle("Calculator");
		setLayout(new BorderLayout()); 
		this.setJMenuBar(null);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setContentPane(new MainPanel());
		this.setVisible(true);
 
		this.pack();
		this.setLocationRelativeTo(null);
	}
 
	private class MainPanel
	extends JPanel {
 
		private static final long serialVersionUID = 1L;
 
		public MainPanel() {
			super(new BorderLayout());
 
			JTextField text = new JTextField(10);
			JPanel textWindow = new JPanel();
			textWindow.add(text);
 
			this.add(textWindow, BorderLayout.NORTH);
			this.add(Buttons.panel, BorderLayout.SOUTH);
 
 
 
		}
 
	}
 
}

Class Buttons

package gui;
 
 
import java.awt.GridLayout;
 
import javax.swing.JPanel;
import javax.swing.JButton;
 
 
public class Buttons 
extends JPanel {
 
	private static final long serialVersionUID = 1L;
 
	public static final Buttons panel = new Buttons();
 
 
	public Buttons() {
 
		super(new GridLayout(3,3));
		this.add(new JButton("1"));
		this.add(new JButton("2"));
		this.add(new JButton("3"));
		this.add(new JButton("4"));
		this.add(new JButton("5"));
		this.add(new JButton("6"));
		this.add(new JButton("7"));
		this.add(new JButton("8"));
		this.add(new JButton("9"));
 
	}
 
}

Class Main

import gui.Panel;
 
public class Main {
 
	public static void main (String [] _) {
		new Panel();
	}
 
}

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Originally Posted by Norm

I see two JFrame objects being created. Where is the stuff you want to see?

I want to see a frame with 9 buttons and 1 textfield. How do you see 2 JFrames beeing created, i see only one?
Are you refering to "Panel" where i extend with JFrame?

What in my code do i have to change in order to get this to work?

Keep in mind that you will also need an ActionListener for each button.