Java Utililty Methods Long Number Create

List of utility methods to do Long Number Create

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Description

The list of methods to do Long Number Create are organized into topic(s).

Method

longtoLong(byte[] arr)
to Long 
int high = (arr[0] << 24) | ((arr[1] & 0xff) << 16) | ((arr[2] & 0xff) << 8) | (arr[3] & 0xff);
int low = (arr[4] << 24) | ((arr[5] & 0xff) << 16) | ((arr[6] & 0xff) << 8) | (arr[7] & 0xff);
return (((long) high) << 32) | (low & 0x0ffffffffL);
longtoLong(byte[] array, int offset)
to Long 
long value = 0;
for (int i = offset; i < offset + 8; i++) {
    value <<= 8;
    value ^= (long) array[i] & 0xFF;
return value;
longtoLong(byte[] b)
to Long 
return ((((long) b[7]) & 0xFF) | ((((long) b[6]) & 0xFF) << 8) | ((((long) b[5]) & 0xFF) << 16)
        | ((((long) b[4]) & 0xFF) << 24) | ((((long) b[3]) & 0xFF) << 32) | ((((long) b[2]) & 0xFF) << 40)
        | ((((long) b[1]) & 0xFF) << 48) | ((((long) b[0]) & 0xFF) << 56));
longtoLong(byte[] b)
Converts a byte array of 1-8 bytes to a long. 
if ((b.length < 1) || (b.length > 8)) {
    throw new IllegalArgumentException("Array of size " + b.length + " cannot be converted to long.");
long result = 0L;
for (int i = 0; i < b.length; i++) {
    result = ((0xFFL & b[i]) << ((b.length - i - 1) * 8)) | result;
return result;
...
longtoLong(byte[] b)
Build a long from first 8 bytes of the array. 
if (b.length != 8) {
    throw new IllegalArgumentException();
return ((long) b[7] & 0xFF) + (((long) b[6] & 0xFF) << 8) + (((long) b[5] & 0xFF) << 16)
        + (((long) b[4] & 0xFF) << 24) + (((long) b[3] & 0xFF) << 32) + (((long) b[2] & 0xFF) << 40)
        + (((long) b[1] & 0xFF) << 48) + (((long) b[0] & 0xFF) << 56);
longtoLong(byte[] b)
to Long 
long MASK = 0xFF;
long result = 0;
result = b[7] & MASK;
result = result + ((b[6] & MASK) << 8);
result = result + ((b[5] & MASK) << 16);
result = result + ((b[4] & MASK) << 24);
result = result + ((b[3] & MASK) << 32);
result = result + ((b[2] & MASK) << 40);
...
longtoLong(byte[] b)
Converts the first eight bytes of b to a 64-bit signed integer. 
return toLong(b, 0);
longtoLong(byte[] b)
to Long 
long s = 0;
long s0 = b[0] & 0xff;
long s1 = b[1] & 0xff;
long s2 = b[2] & 0xff;
long s3 = b[3] & 0xff;
long s4 = b[4] & 0xff;
long s5 = b[5] & 0xff;
long s6 = b[6] & 0xff;
...
longtoLong(byte[] b)
to Long 
return toLong(b, 0);
longtoLong(byte[] b, int off, boolean bigEndian)
to Long 
if (bigEndian) {
    return (((long) (b[0] & 0xff)) << 56) | (((long) (b[1] & 0xff)) << 48) | (((long) (b[2] & 0xff)) << 40)
            | (((long) (b[3] & 0xff)) << 32) | (((long) (b[4] & 0xff)) << 24)
            | (((long) (b[5] & 0xff)) << 16) | (((long) (b[6] & 0xff)) << 8) | ((long) (b[7] & 0xff));
} else {
    return (((long) (b[7] & 0xff)) << 56) | (((long) (b[6] & 0xff)) << 48) | (((long) (b[5] & 0xff)) << 40)
            | (((long) (b[4] & 0xff)) << 32) | (((long) (b[3] & 0xff)) << 24)
            | (((long) (b[2] & 0xff)) << 16) | (((long) (b[1] & 0xff)) << 8) | ((long) (b[0] & 0xff));
...