Unintentional memory retention in GridBagLayout

GridBagLayout adds any component handed to it via the addLayoutComponent
method to an internal hashtable. It does nothing upon the invocation of
removeLayoutComponent.

Thus,

JFrame frame = new JFrame("Test");
frame.getContentPane().setLayout(new GridBagLayout());
frame.getContentPane().add(componentA);
frame.getContentPane().add(componentB);
frame.getContentPane().add(componentC);
frame.getContentPane().remove(componentA);
frame.getContentPane().remove(componentB);
frame.getContentPane().remove(componentC);

// At the end, the container content pane no longer has any references
// to the components, but there are references to the three components
// in the comptable hashtable in the GridBagLayout component

janet.koenig@Eng 1998-08-28