GridBagLayout multiple buttons + border

Question

I am trying to use a GridBagLayout for 10 (3x3 + 1) JButtons inside a JPanel using BoxLayout .

But what am I doing with glueboxes or similar, the GridBagLayout JPanel takes up all the extra space in BoxLayout . I probably missed something or is it impossible to do?

One solution that I used was to push the buttons up with the expanding element inside the gridbaglayout. This puts the buttons in the right place, but the frame window looks large.

Here follows my sample code:

 import java.awt.Container; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import javax.swing.BorderFactory; import javax.swing.Box; import javax.swing.BoxLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; public class GridBagLayoutTest extends JFrame { public GridBagLayoutTest(){ super(); this.setTitle("JVectorView"); this.setSize(300,300); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Container content = this.getContentPane(); content.setLayout(new BoxLayout(content, BoxLayout.Y_AXIS)); content.add(new JLabel("Hello!")); content.add(new Controls()); content.add(Box.createGlue()); this.setVisible(true); } private class Controls extends JPanel{ private static final int WIDTH = 3, HEIGHT = 3; public Controls(){ GridBagConstraints constraints = new GridBagConstraints(); //this.setBorder(BorderFactory.createLineBorder(Color.red)); this.setBorder(BorderFactory.createTitledBorder("Some stuff")); constraints.fill = GridBagConstraints.NONE; this.setLayout(new GridBagLayout()); for(int row = 0; row < HEIGHT; row++){ for(int col = 0; col < WIDTH; col++){ constraints.gridx = col; constraints.gridy = row; this.add(new JButton("B"+(col+row*WIDTH)), constraints); } } constraints.gridx = 1; constraints.gridy = 3; this.add(new JButton("B"+(10)), constraints); } } public static void main(String[] args) { new GridBagLayoutTest(); } } 

I would like the border to be tight around the buttons. Is it even possible to get a gridbaglayout to collapse its contents, or does it always make the panels fill up?

Answer 1

 JPanel p=new JPanel(new FlowLayout()); p.add(new Controls()); content.add(p);