/** Returns true, if the object is in the set. */ public boolean contains(T obj) { /* check if the object is in the map, direct call of map.getInt will * add the object into the map. */ if (!map.contains(obj)) return false; int bitNum = map.getInt(obj); return (bits[bitNum / 32] & (1 << (bitNum % 32))) != 0; }
public void remove(T obj) { int bitNum = map.getInt(obj); bits[bitNum / 32] &= ~(1 << (bitNum % 32)); }
public void add(T obj) { int bitNum = map.getInt(obj); bits[bitNum / 32] |= 1 << (bitNum % 32); }