GridBagLayout gbl = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
this.getContentPane().setLayout(gbl);
/** Create attributes panel **/
_attributesPanel = new ViewMBeanAttributes(obj);
_attributesPanel.setPreferredSize(new Dimension(500,200));
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 1.0;
gbc.weighty = 1.0;