Java Utililty Methods Int64 Convert

List of utility methods to do Int64 Convert

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Description

The list of methods to do Int64 Convert are organized into topic(s).

Method

Objectint64(Object value)
int 
if (value instanceof Number) {
    Number number = (Number) value;
    return number.longValue();
return value;
byte[]Int642Bytes(long sour)
Int Bytes 
byte dest[] = { (byte) ((sour & 0xFF00000000000000L) >> 56), (byte) ((sour & 0x00FF000000000000L) >> 48),
        (byte) ((sour & 0x0000FF0000000000L) >> 40), (byte) ((sour & 0x000000FF00000000L) >> 32),
        (byte) ((sour & 0x00000000FF000000L) >> 24), (byte) ((sour & 0x0000000000FF0000L) >> 16),
        (byte) ((sour & 0x000000000000FF00L) >> 8), (byte) (sour & 0x00000000000000FF) };
return dest;
voidint64_to_buf(byte buf[], int pos, long value)
intbuf 
buf[pos + 7] = (byte) (value >> 0);
buf[pos + 6] = (byte) (value >> 8);
buf[pos + 5] = (byte) (value >> 16);
buf[pos + 4] = (byte) (value >> 24);
buf[pos + 3] = (byte) (value >> 32);
buf[pos + 2] = (byte) (value >> 40);
buf[pos + 1] = (byte) (value >> 48);
buf[pos + 0] = (byte) (value >> 56);
...
longint64d(byte[] buf, int off)
intd 
long b = 0;
for (int i = 0; i < 8; i++)
    b |= ((long) ub(buf[off + i])) << (i * 8);
return (b);
byte[]int64ToByteArray(long value, int size)
Converts an int64 into a byte array with a maximum size of 8. 
if (size > 8) {
    return null;
byte[] tempResult = new byte[8];
clear(tempResult);
int offset = 7;
while (value != 0 && offset != -1) {
    tempResult[offset] = (byte) (value & 0xFF);
...
intint64toInt32(long key)
Hashes a long to an int 
key = (~key) + (key << 18);
key = key ^ (key >>> 31);
key = key * 21;
key = key ^ (key >>> 11);
key = key + (key << 6);
key = key ^ (key >>> 22);
return (int) key;