title: GridLayout ButtonPanel not Displaying Rows/Columns specified
body: <p>So this code specifically says that there should be three rows and one column for <code>JPanel</code> <code>selectPanel</code>, however, when I run it I get this result and just can't figure out what I'm doing wrong. Most of this code is not relevant to the problem I think. The beginning is where I make the panel that is giving me issues (selectPanel) and the end is where that panel is added to the JFrame (roiguide).</p>
  
  <p>Result of Code:</p>
  
  <p><img src="https://i.stack.imgur.com/l1nmf.png"></p>
  
  <pre><code>    JPanel selectPanel = new JPanel();
      selectPanel.setLayout(new GridLayout(3,1,0,0));
      selectPanel.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
  
      imp.getWindow().toFront();
      IJ.setTool(Toolbar.RECTANGLE);
  
      referenceButton = new JButton("Add reference region");
      referenceButton.setEnabled(true);
      referenceButton.addActionListener(new ActionListener(){
          public void actionPerformed(ActionEvent e){
              refDefine();
          }
      });
      refLabel = new JLabel(" ("+printformat.format(rno)+"/1)");
      selectPanel.add(referenceButton);
      selectPanel.add(refLabel);
  
      backgroundButton = new JButton("Add background region");
      backgroundButton.setEnabled(true);
      backgroundButton.addActionListener(new ActionListener(){
          public void actionPerformed(ActionEvent e){
              brDefine();
          }
      });
      backgroundLabel = new JLabel(" ("+printformat.format(bno)+"/"+printformat.format(spotno)+")");
      selectPanel.add(backgroundButton);
      selectPanel.add(backgroundLabel);
  
      spotButton = new JButton("Add spot");
      spotButton.setEnabled(true);
      spotButton.addActionListener(new ActionListener(){
          public void actionPerformed(ActionEvent e){
              spotDefine();
          }
      });
      spotLabel = new JLabel(" ("+printformat.format(sno)+"/"+printformat.format(spotno)+")");
      selectPanel.add(spotButton);
      selectPanel.add(spotLabel);
  
      JPanel editPanel = new JPanel();
      selectPanel.setLayout(new GridLayout(2,1,20,20));
      selectPanel.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
  
      jComboBox1 = new JComboBox();
      editPanel.add(jComboBox1);
  
      JButton editButton = new JButton("Edit ROIs");
      editButton.setEnabled(true);
      editButton.addActionListener(new ActionListener(){
          public void actionPerformed(ActionEvent e){
              String item = (String) jComboBox1.getSelectedItem();
              Roi roi = overlay.get(overlay.getIndex(item));
          }
          });
      editPanel.add(editButton);
  
      // Create the buttonPanel, which has the "Cancel" and "OK" buttons
      JPanel buttonPanel = new JPanel();
      buttonPanel.setLayout(new GridLayout(1,2,20,20));
      buttonPanel.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
      JButton cancelButton = new JButton("Cancel");
      cancelButton.setEnabled(true);
      cancelButton.addActionListener(new ActionListener(){
          public void actionPerformed(ActionEvent e){
              didCancel = true;
              roiguide.dispose();
              overlay.clear();
          }
      });
      buttonPanel.add(cancelButton);
  
      JButton okButton = new JButton("OK");
      okButton.setEnabled(true);
      okButton.addActionListener(new ActionListener(){
          public void actionPerformed(ActionEvent e){
              if(current!=roino){
                  IJ.error("ROI Manager","Please select " + roino + " regions of interest.");
              }else{
                  canContinue=true;
                  roiguide.dispose(); 
              }
          }
      });
      buttonPanel.add(okButton);
  
      // Create and populate the JFrame
      roiguide = new JFrame("Add regions of interest:");
      roiguide.getContentPane().add(selectPanel, BorderLayout.NORTH);
      roiguide.getContentPane().add(editPanel, BorderLayout.WEST);
      roiguide.getContentPane().add(buttonPanel, BorderLayout.EAST);
      roiguide.pack();
      roiguide.setLocation(400,400);
      roiguide.setVisible(true);
      roiguide.setResizable(false);
  </code></pre>