Utility class for storing 64 booleans in a long

BitBoolean.java

public class BitBoolean {

    private static final long[] indexToBitMask = new long[64];

    static {
        long mask = 1;
        for (int i=0; i<64; i++) {
            indexToBitMask[i] = mask;
            mask *= 2;
        }
    }


    public static long TRUE = -1; // all 1's in binary
    public static long FALSE = 0;


    public static long setTrue(long container, int index) {
        return container | indexToBitMask[index];
    }

    public static long setFalse(long container, int index) {
        return container & (~indexToBitMask[index]);
    }

    public static boolean get(long container, int index) {
        return ((container >> index) & 1) == 1;
    }

}

My version https://github.com/yujunliang/lambda/blob/master/src/main/java/algocraft/function/SixFlags.java