title: Center JLabel within JPanel with GroupLayout
body: <p>I am kind of frustrated with the group layout. How can I make it so that the label <code>upLabel</code> will be centered within the red upper panel?</p>
  
  <p>This example is not working and I tried out a lot of things, so this was my last try before I kicked out the monitor out of the window ;-)</p>
  
  <p>I know that there are better ways to center to text within the <code>JPanel</code>, but I just wanted to play around and wanted to understand the basics. I read to examples from oracle.com, but they are much more complex and honestly easier to understand. But this simple task isn't working for me.</p>
  
  <p>Many greetings and thanks</p>
  
  <pre><code>import java.awt.Color;
  import javax.swing.GroupLayout;
  import javax.swing.GroupLayout.Alignment;
  import javax.swing.*;
  
  public class Main1 extends JFrame{
  
  public static void main(String[] args) {
      new Main1().begin();
  }
  
  public void begin() {
      try {
          UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
  
          setResizable(true);
          setSize(500, 500);
          setTitle("Hauptmenue");
          setLocationRelativeTo(null);
          setVisible(true);
          this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
          GroupLayout layout = new GroupLayout(this.getContentPane());
          this.getContentPane().setLayout(layout);
  
          layout.setAutoCreateGaps(true);
          layout.setAutoCreateContainerGaps(true);
  
          JPanel up = new JPanel();
          up.setBackground(Color.RED);
          JPanel mid = new JPanel();
          JPanel bot = new JPanel();
  
          // von links
          layout.setHorizontalGroup(layout.createParallelGroup().
                  addComponent(up,300, 400, Short.MAX_VALUE).
                  addComponent(mid).
                  addComponent(bot));
          // von oben
          layout.setVerticalGroup(layout.createSequentialGroup().addComponent(up).
                  addComponent(mid).
                  addComponent(bot));
  
          layout = new GroupLayout(up);
          up.setLayout(layout);
  
          JLabel upLabel = new JLabel("Dummy Text");
  
          layout.setHorizontalGroup(layout.createSequentialGroup().addComponent(upLabel, 300, 400, Short.MAX_VALUE));
          layout.setVerticalGroup(layout.createSequentialGroup().addComponent(upLabel));
      } catch (Exception e) {
          e.printStackTrace();
      }
  }
  }
  </code></pre>