FixedSizeBitSet set=new FixedSizeBitSet(10);
set.set(0, 9);
assert set.cardinality() == 10;
set.clear(0);
assert set.cardinality() == 9;
set.clear(9);
assert set.cardinality() == 8;
assert !set.get(9);
set.clear(5); set.clear(6);
System.out.println("set = " + set);
assert set.cardinality() == 6;