this.setSize(this.getPreferredSize());
  public void remove(int index)  {    super.remove(index);    GridBagConstraints constraints = new GridBagConstraints();    constraints.fill = GridBagConstraints.BOTH;    constraints.weightx = 100.0;    constraints.weighty = 100.0;    Component[] items = getComponents();    for (int i = index; i < items.length; i++)      {	constraints.gridy = i;	super.add(items[i], constraints, i);      }  }