Java Utililty Methods Integer From

int intFrom(byte a, byte b, byte c, byte d)
int From

return (a << 24) + (b << 16) + (c << 8) + d;

int intFrom2Bytes(byte[] bytes, int index)
Get an unsigned integer from two bytes sampled from within a byte stream, starting at the specified index

return ((bytes[index] << 8) + bytes[index + 1]);

long intFrom4Bytes(byte[] bytes, int index)
Get an unsigned integer from a 4-byte word

return intFrom4Bytes(bytes, index, false);

int intFromBase64(String value)
int From Base

return (int) longFromBase64(value);

int intFromBigEndainByteArray(byte[] buf, int offset, int len)
utility to generate an int from an array of bytes in BigEndain order

return (int) longFromBigEndainArray(buf, offset, len);

int intFromByte(byte byteValue)
Get an unsigned integer from a single byte.

int val = 0;
val |= byteValue & 0x000000ff;
return val;

int intFromByteArray(final byte[] buf, final int offset)
int From Byte Array

int v = 0;
v |= ((((int) buf[offset + 0]) & 0xFF) << 24);
v |= ((((int) buf[offset + 1]) & 0xFF) << 16);
v |= ((((int) buf[offset + 2]) & 0xFF) << 8);
v |= ((((int) buf[offset + 3]) & 0xFF) << 0);
return v;

int intFromByteArray(final byte[] byteArray)
int From Byte Array

if (byteArray == null || byteArray.length == 0) {
 throw new IllegalArgumentException("Cannot convert an empty array into an int");
int result = (0xff & byteArray[0]);
for (int i = 1; i < byteArray.length; i++) {
 result = (result << 8) | (0xff & byteArray[i]);
return result;
...

int[] intFromByteRGB(byte[] reds, byte[] greens, byte[] blues)
int From Byte RGB

int[] pixels = new int[reds.length];
for (int i = 0; i < pixels.length; i++) {
 pixels[i] = ((reds[i] & 0xff) << 16) | ((greens[i] & 0xff) << 8) | (blues[i] & 0xff);
return pixels;

int intFromBytes(byte[] b)
int From Bytes

return (b[0] << 24) | (b[1] & 0xFF) << 16 | (b[2] & 0xFF) << 8 | (b[3] & 0xFF);