Re: Simple BorderLayout problem

... problem with BorderLayout ...
I have JPanel with a TitledBorder (like a "group" widget) and this
JPanel contains a button.

Now I want to displays this JPanel centered horizontally and vertically
and I don't want it to occupy all the space of the client area of the
JFrame.

I tried this [indentation restored from original post - LB]:
package main;

import java.awt.BorderLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.TitledBorder;

public class CenteredGroup {

  CenteredGroup() {
    frame.setSize(1024, 768);
    frame.setLocationRelativeTo(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel contentPane = (JPanel)frame.getContentPane();

    BorderLayout borderLayout = new BorderLayout(50, 50);

    frame.setLayout(borderLayout);

    contentPane.setLayout(borderLayout);

    JPanel groupPanel = new JPanel();

    groupPanel.setBorder(new TitledBorder("This is my group text."));

    JButton button = new JButton("A button");

    groupPanel.add(button);

    contentPane.add(groupPanel, BorderLayout.CENTER);

    frame.setVisible(true);
  }

  public static void main(String[] args) {
    new CenteredGroup();
  }

  JFrame frame = new JFrame("Centered Group");

}

However, the "group control" occupies the entire client area of the
frame. Why?