public class BitOps {
	long bitSet;
	int bitIndex;
	public BitOps(long bitSet, int bitIndex){
		this.bitSet=bitSet;
		this.bitIndex=bitIndex;
	}
	public long set(long bitSet, int bitIndex){
		long a = 1 << bitIndex;
		bitSet |= a;
		return bitSet;
	}
	public boolean isSet(long bitSet, int bitIndex){
		if ((bitSet & bitIndex) == bitIndex) {
			return true;
		}
		return false;
	}
	public long clear(long bitSet, int bitIndex){
		long a = 1 << bitIndex;
		bitSet &= ~a;
		return bitSet;
	}
	public long flip(long bitSet, int bitIndex){
		if(isSet(bitSet,bitIndex))
			return clear(bitSet,bitIndex);
		else
			return set(bitSet,bitIndex);
	}
}