// Create and specify a layout manager
this.setLayout(new GridBagLayout());
// Create a constraints object, and specify some default values
GridBagConstraints c = new GridBagConstraints();
c.fill = GridBagConstraints.BOTH; // components grow in both dimensions
c.insets = new Insets(5,5,5,5); // 5-pixel margins on all sides
// Create and add a bunch of buttons, specifying different grid
// position, and size for each.
// Give the first button a resize weight of 1.0 and all others
// a weight of 0.0. The first button will get all extra space.
c.gridx = 0; c.gridy = 0; c.gridwidth = 4; c.gridheight=4;
c.weightx = c.weighty = 1.0;
this.add(new Button("Button #1"), c);
c.gridx = 4; c.gridy = 0; c.gridwidth = 1; c.gridheight=1;
c.weightx = c.weighty = 0.0;
this.add(new Button("Button #2"), c);
c.gridx = 4; c.gridy = 1; c.gridwidth = 1; c.gridheight=1;
this.add(new Button("Button #3"), c);
c.gridx = 4; c.gridy = 2; c.gridwidth = 1; c.gridheight=2;
this.add(new Button("Button #4"), c);
c.gridx = 0; c.gridy = 4; c.gridwidth = 1; c.gridheight=1;
this.add(new Button("Button #5"), c);
c.gridx = 2; c.gridy = 4; c.gridwidth = 1; c.gridheight=1;
this.add(new Button("Button #6"), c);
c.gridx = 3; c.gridy = 4; c.gridwidth = 2; c.gridheight=1;
this.add(new Button("Button #7"), c);
c.gridx = 1; c.gridy = 5; c.gridwidth = 1; c.gridheight=1;
this.add(new Button("Button #8"), c);
c.gridx = 3; c.gridy = 5; c.gridwidth = 1; c.gridheight=1;
this.add(new Button("Button #9"), c);
