Java Utililty Methods Long Number From

List of utility methods to do Long Number From

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Description

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

Method

longlongFromBase64(String value)
Decode a base64 string into a long value. 
int pos = 0;
long longVal = base64Values[value.charAt(pos++)];
int len = value.length();
while (pos < len) {
    longVal <<= 6;
    longVal |= base64Values[value.charAt(pos++)];
return longVal;
...
longlongFromBigEndainArray(byte[] buf, int offset, int len)
utility to build a long from values in an array of bytes in bigEndian order 
long val = 0;
for (int i = 0; i < len; i++) {
    val = val << 8;
    int d = (0xff & buf[i + offset]);
    val += d;
return val;
longlongFromByteArray(byte[] bytes)
long From Byte Array 
long value = 0;
for (int i = 0; i < bytes.length; i++) {
    value = (value << 8) + (bytes[i] & 0xFF);
return value;
longlongFromByteArray(final byte[] buf, final int offset)
long From Byte Array 
long v = 0;
v |= ((((long) buf[offset + 0]) & 0xFF) << 56);
v |= ((((long) buf[offset + 1]) & 0xFF) << 48);
v |= ((((long) buf[offset + 2]) & 0xFF) << 40);
v |= ((((long) buf[offset + 3]) & 0xFF) << 32);
v |= ((((long) buf[offset + 4]) & 0xFF) << 24);
v |= ((((long) buf[offset + 5]) & 0xFF) << 16);
v |= ((((long) buf[offset + 6]) & 0xFF) << 8);
...
longlongFromBytes(byte b8, byte b7, byte b6, byte b5, byte b4, byte b3, byte b2, byte b1)
long From Bytes 
long l = 0;
l += (((long) b1) & 0xFF);
l += (((long) b2) & 0xFF) << 8;
l += (((long) b3) & 0xFF) << 16;
l += (((long) b4) & 0xFF) << 24;
l += (((long) b5) & 0xFF) << 32;
l += (((long) b6) & 0xFF) << 40;
l += (((long) b7) & 0xFF) << 48;
...
longlongFrombytes(byte[] b, int pos)
long Frombytes 
long c = b2i(b[pos + 4]) + b2i(b[pos + 5]) * 256 + b2i(b[pos + 6]) * 65536 + b2i(b[pos + 7]) * 65536 * 256;
c = c << 16;
return c;
longlongFromBytes(byte[] buffer, int offset)
Converts consecutive bytes from a buffer into a long. 
return integralFromBytes(buffer, offset, 8);
longlongFromBytes(byte[] bytes, int index)
Unsigned Long from 8 bytes 
if ((bytes == null) || (bytes.length < 7)) {
    return -1;
int idx = index;
long val = 0;
for (int i = 0; i < 8; i++) {
    if (i < 7) {
        val |= (((long) bytes[idx + i] & 0x000000ff) << (64 - ((i + 1) * 8)));
...
longlongFromBytes(byte[] bytes, int offset)
long From Bytes 
long ret = 0;
ret |= (bytes[offset + 0] & 0xFFL) << 56;
ret |= (bytes[offset + 1] & 0xFFL) << 48;
ret |= (bytes[offset + 2] & 0xFFL) << 40;
ret |= (bytes[offset + 3] & 0xFFL) << 32;
ret |= (bytes[offset + 4] & 0xFFL) << 24;
ret |= (bytes[offset + 5] & 0xFFL) << 16;
ret |= (bytes[offset + 6] & 0xFFL) << 8;
...
longlongFromDB(String dbLong)
long From DB 
String s = dbLong.substring(2);
return Long.parseLong(s);