public boolean containsKey(final long key) {
        int index = longHash(key, mask);
        while (null != values[index]) {
            if (key == keys[index]) {
                return true;
            }
            index = ++index & mask;
        }
        return false;
    }
public boolean containsKey ( final long key ) { int index = longHash ( key , mask ) ; while ( null != values [ index ] ) { if ( key == keys [ index ] ) { return true ; } index = ++ index & mask ; } return false ; }
Overloaded version of {@link Map#containsKey(Object)} that takes a primitive long key.

@param key for indexing the {@link Map}
@return true if the key is found otherwise false.