Java Utililty Methods Integer to Byte Array

List of utility methods to do Integer to Byte Array

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Description

The list of methods to do Integer to Byte Array are organized into topic(s).

Method

voidintegerToBytes(int v, byte[] b)
integer To Bytes 
assert b.length >= 4;
b[0] = (byte) ((v >>> 24) & 0xFF);
b[1] = (byte) ((v >>> 16) & 0xFF);
b[2] = (byte) ((v >>> 8) & 0xFF);
b[3] = (byte) ((v >>> 0) & 0xFF);
voidintegerToBytes(int v, byte[] b)
integer To Bytes 
assert b.length >= 4;
b[0] = (byte) ((v >>> 24) & 0xFF);
b[1] = (byte) ((v >>> 16) & 0xFF);
b[2] = (byte) ((v >>> 8) & 0xFF);
b[3] = (byte) ((v >>> 0) & 0xFF);
byte[]integerToBytes(int value)
integer To Bytes 
return new byte[] { (byte) (value >>> 24), (byte) (value >>> 16), (byte) (value >>> 8), (byte) value };
byte[]integerToBytes(int x)
integer To Bytes 
byte[] b = new byte[4];
for (int i = 0; i < 4; ++i) {
    b[i] = (byte) (x >> (4 - i - 1 << 3));
return b;
byte[]intTo2Bytes(int x)
int To Bytes 
byte[] out = new byte[2];
out[1] = (byte) (x & 0xff);
out[0] = (byte) ((x >> 8) & 0xff);
return out;
byte[]intTo4ByteArray(int value)
Convert an integer getParamName to its byte array representation 
byte[] result = new byte[4];
for (int i = 0; i < 4; i++) {
    int offset = (result.length - 1 - i) * 8;
    result[i] = (byte) ((value >>> offset) & 0xFF);
return result;
byte[]intTo4Bytes(int i)
int To Bytes 
return new byte[] { (byte) ((i >> 24) & 255), (byte) ((i >> 16) & 255), (byte) ((i >> 8) & 255),
        (byte) (i & 255) };
voidintToByteArray(byte[] bytes, int i)
int To Byte Array 
bytes[0] = (byte) (i >> 24);
bytes[1] = (byte) ((i << 8) >> 24);
bytes[2] = (byte) ((i << 16) >> 24);
bytes[3] = (byte) ((i << 24) >> 24);
byte[]intToByteArray(final int integer)
Returns a byte array containing the two's-complement representation of the integer.
The byte array will be in big-endian byte-order with a fixes length of 4 (the least significant byte is in the 4th element).

Example:
intToByteArray(258) will return { 0, 0, 1, 2 },
BigInteger.valueOf(258).toByteArray() returns { 1, 2 }. 
int byteNum = (40 - Integer.numberOfLeadingZeros(integer < 0 ? ~integer : integer)) / 8;
byte[] byteArray = new byte[4];
for (int n = 0; n < byteNum; n++) {
    byteArray[3 - n] = (byte) (integer >>> (n * 8));
return (byteArray);
byte[]intToByteArray(final int integer)
int To Byte Array 
int byteNum = (40 - Integer.numberOfLeadingZeros(integer < 0 ? ~integer : integer)) / 8;
byte[] byteArray = new byte[4];
for (int n = 0; n < byteNum; n++)
    byteArray[3 - n] = (byte) (integer >>> (n * 8));
return (byteArray);