Needing help with GroupLayout

[Janohjk]

Im trying to add items to a GroupLayout, those items are generated by another class, the items are added by a for, but currently it is adding one group or the old ones are replaced by the newer, im not sure, this is my code:

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

public class myClass extends JFrame 
{
	private static final int NUMERO_PANELES = 2;
	Panel[] paneles = new Panel[NUMERO_PANELES];

	public myClass()
	{
		super("MyTest");
		GroupLayout layout = new GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
		
		for(int i = 0; i < NUMERO_PANELES; i++)
		{
			Panel aux = new Panel();
			aux.build();			// here we build the buttons and other components
			paneles[i] = aux;
		}
				
		GroupLayout.Group horizontal = layout.createParallelGroup(GroupLayout.Alignment.LEADING);

		for(int i = 0; i < NUMERO_PANELES; i++)
		{
			Panel temporal = paneles[i];

			GroupLayout.Group temporalGroup = layout.createSequentialGroup()
				.addContainerGap()
					.addComponent(temporal.getBotonDo(), GroupLayout.PREFERRED_SIZE, 54, GroupLayout.PREFERRED_SIZE)
						.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
					.addComponent(temporal.getBotonRe(), GroupLayout.PREFERRED_SIZE, 54, GroupLayout.PREFERRED_SIZE)
						.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
					.addComponent(temporal.getBotonMi(), GroupLayout.PREFERRED_SIZE, 54, GroupLayout.PREFERRED_SIZE)
						.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
					.addComponent(temporal.getBotonFa(), GroupLayout.PREFERRED_SIZE, 54, GroupLayout.PREFERRED_SIZE)
						.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
					.addComponent(temporal.getBotonSol(), GroupLayout.PREFERRED_SIZE, 54, GroupLayout.PREFERRED_SIZE)
						.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
					.addComponent(temporal.getBotonLa(), GroupLayout.PREFERRED_SIZE, 54, GroupLayout.PREFERRED_SIZE)
						.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
					.addComponent(temporal.getBotonSi(), GroupLayout.PREFERRED_SIZE, 54, GroupLayout.PREFERRED_SIZE)
						.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
					.addComponent(temporal.getBotonDoAlto(), GroupLayout.PREFERRED_SIZE, 58, GroupLayout.PREFERRED_SIZE)
						.addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED)

				.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING, false)
					.addComponent(temporal.getTempo()).addComponent(temporal.getInstrumentos(), 0, 95, Short.MAX_VALUE))
						.addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED)
					.addComponent(temporal.getBotonSet(), GroupLayout.PREFERRED_SIZE, 54, GroupLayout.PREFERRED_SIZE)
						.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
					.addComponent(temporal.getBotonPlay(), GroupLayout.PREFERRED_SIZE, 78, GroupLayout.PREFERRED_SIZE)
						.addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE);

			horizontal.addGroup(temporalGroup);
		}
		layout.setHorizontalGroup(horizontal);
			
		GroupLayout.Group vertical = layout.createParallelGroup(GroupLayout.Alignment.LEADING);
		
		for(int i = 0; i < NUMERO_PANELES; i++)
		{
			Panel temporal = paneles[i];
			GroupLayout.Group temporalGroup = layout.createSequentialGroup()
				.addContainerGap()
					.addGroup(layout.createParallelGroup(GroupLayout.Alignment.TRAILING)
						.addComponent(temporal.getBotonDoAlto(), GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 48, Short.MAX_VALUE)
					.addGroup(GroupLayout.Alignment.LEADING, layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
						.addComponent(temporal.getBotonSet(), GroupLayout.DEFAULT_SIZE, 48, Short.MAX_VALUE)
						.addComponent(temporal.getBotonPlay(), GroupLayout.DEFAULT_SIZE, 48, Short.MAX_VALUE))
					.addGroup(GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
						.addComponent(temporal.getInstrumentos(), GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
							.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED, 8, Short.MAX_VALUE)
						.addComponent(temporal.getTempo(), GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
						.addComponent(temporal.getBotonDo(), GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 48, Short.MAX_VALUE)
						.addComponent(temporal.getBotonRe(), GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 48, Short.MAX_VALUE)
						.addComponent(temporal.getBotonMi(), GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 48, Short.MAX_VALUE)
						.addComponent(temporal.getBotonFa(), GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 48, Short.MAX_VALUE)
						.addComponent(temporal.getBotonSol(), GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 48, Short.MAX_VALUE)
						.addComponent(temporal.getBotonLa(), GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 48, Short.MAX_VALUE)
						.addComponent(temporal.getBotonSi(), GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 48, Short.MAX_VALUE))
				.addContainerGap();
			vertical.addGroup(temporalGroup);
		}
		layout.setVerticalGroup(vertical);
		pack();
	}
	
    public static void main(String[] params)
    {
		java.awt.EventQueue.invokeLater(
			new Runnable() 
			{
				public void run() 
				{
					new myClass().setVisible(true);
				}
			}
		);
    }
}

The layout base was generated by netbeans, any help is welcome, thanks in advances.

Edit: This is an aproximated image of what i need.

[mine0926]

I have'nt use group layout, but I could say that you can use GridLayout with some panels to have
the output that you want. Also, are you using an AWT (the Panel) on a SWING (JFrame)?

Might be helpful
Lesson: Laying Out Components Within a Container (The Java™ Tutorials > Creating a GUI With JFC/Swing)

[Janohjk]

I solved my problem using GroupLayout in another way, thanks anyway