Java Utililty Methods Long Number Convert To

List of utility methods to do Long Number Convert To

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Description

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

Method

byte[]fromLong(long longValue)
Interpret a long as its binary form 
byte[] bytes = new byte[8];
bytes[0] = (byte) (longValue >> 56);
bytes[1] = (byte) ((longValue << 8) >> 56);
bytes[2] = (byte) ((longValue << 16) >> 56);
bytes[3] = (byte) ((longValue << 24) >> 56);
bytes[4] = (byte) ((longValue << 32) >> 56);
bytes[5] = (byte) ((longValue << 40) >> 56);
bytes[6] = (byte) ((longValue << 48) >> 56);
...
voidfromLong(long v, int offset, byte[] dest)
from Long 
assert (dest.length >= (8 + offset));
dest[0 + offset] = (byte) ((v >> 56) & 0xff);
dest[1 + offset] = (byte) ((v >> 48) & 0xff);
dest[2 + offset] = (byte) ((v >> 40) & 0xff);
dest[3 + offset] = (byte) ((v >> 32) & 0xff);
dest[4 + offset] = (byte) ((v >> 24) & 0xff);
dest[5 + offset] = (byte) ((v >> 16) & 0xff);
dest[6 + offset] = (byte) ((v >> 8) & 0xff);
...
StringfromLong(Long value)
from Long 
return Long.toString(value);
byte[]fromLong(long value)
Converts a long value to a byte array. 
byte[] result = { (byte) (0xFFL & (value >>> 56)), (byte) (0xFFL & (value >>> 48)),
        (byte) (0xFFL & (value >>> 40)), (byte) (0xFFL & (value >>> 32)), (byte) (0xFFL & (value >>> 24)),
        (byte) (0xFFL & (value >>> 16)), (byte) (0xFFL & (value >>> 8)), (byte) (0xFFL & value) };
return result;
byte[]fromLong(long value, int numBytes)
from Long 
long mask = 0xFF;
byte[] res = new byte[numBytes];
for (int i = 0; i < numBytes; i++) {
    res[i] = (byte) (value & mask);
    value = value >> 8;
return res;
byte[]fromLong(long x)
from Long 
byte[] result = new byte[8];
result[0] = (byte) ((x >> 56) & 0xFF);
result[1] = (byte) ((x >> 48) & 0xFF);
result[2] = (byte) ((x >> 40) & 0xFF);
result[3] = (byte) ((x >> 32) & 0xFF);
result[4] = (byte) ((x >> 24) & 0xFF);
result[5] = (byte) ((x >> 16) & 0xFF);
result[6] = (byte) ((x >> 8) & 0xFF);
...
LongfromLongString(String longString)
Parses the specified string as a Long instance. 
if (longString == null || longString.trim().isEmpty()) {
    return ZERO_LONG;
try {
    return Long.parseLong(longString);
} catch (Exception e) {
    return 0L;