BorderLayout demo. Also shows off BitSet class from java.util.
Do not assume from this demo that BorderLayout forces
e.g., East and West to be same width, or North and South to be
same height. See BorderLayDemo2 for counter examples.
BitSet b = new BitSet();
b.set(NORTH);
b.set(EAST);
b.set(SOUTH);
b.set(WEST);
b.set(CENTER);
new BordLayDemo("All", b);
b.clear(CENTER);
new BordLayDemo("Compass", b);
b.set(CENTER);
b.clear(NORTH);
b.clear(SOUTH);
new BordLayDemo("Horizontal", b);