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

byte[]intToBytes(int ipInt)
ipInt -> byte[] 
byte[] ipAddr = new byte[INADDRSZ];
ipAddr[0] = (byte) ((ipInt >>> 24) & 0xFF);
ipAddr[1] = (byte) ((ipInt >>> 16) & 0xFF);
ipAddr[2] = (byte) ((ipInt >>> 8) & 0xFF);
ipAddr[3] = (byte) (ipInt & 0xFF);
return ipAddr;
byte[]intToBytes(int n)
int To Bytes 
return intToBytes(n, new byte[4], 0);
byte[]intToBytes(int n)
Convert a integer value to bytes 
byte[] b = new byte[4];
for (int i = 0; i < 4; i++) {
    b[i] = (byte) (n >> (24 - i * 8));
return b;
voidintToBytes(int num, byte[] arr, int pos)
Writes an integer to 4 bytes in big-endian notation to the byte array. 
checkBounds(arr, pos);
arr[pos] = (byte) ((num & 0xFF000000) >> 24);
arr[pos + 1] = (byte) ((num & 0x00FF0000) >> 16);
arr[pos + 2] = (byte) ((num & 0x0000FF00) >> 8);
arr[pos + 3] = (byte) ((num & 0x000000FF));
intintToBytes(int num, byte[] bytes, int startIndex)
translate int into bytes, stored in byte array starting from startIndex 
bytes[startIndex] = (byte) (num & 0xff);
bytes[startIndex + 1] = (byte) ((num >> 8) & 0xff);
bytes[startIndex + 2] = (byte) ((num >> 16) & 0xff);
bytes[startIndex + 3] = (byte) ((num >> 24) & 0xff);
return startIndex + 4;
voidintToBytes(int number, byte[] destination, int destinationIndex)
Convert an Integer to four bytes 
if (destination == null) {
    return;
int idx = destinationIndex;
final int MASK = 0x000000ff;
destination[idx++] = (byte) ((number >>> 24) & MASK);
destination[idx++] = (byte) ((number >>> 16) & MASK);
destination[idx++] = (byte) ((number >>> 8) & MASK);
...
byte[]intToBytes(int v)
Converts an integer to a byte array Byte order: big endian 
byte[] b = new byte[4];
b[0] = (byte) ((v >>> 24) & BYTESIZE);
b[1] = (byte) ((v >>> 16) & BYTESIZE);
b[2] = (byte) ((v >>> 8) & BYTESIZE);
b[3] = (byte) ((v) & BYTESIZE);
return b;
byte[]intToBytes(int v)
int To Bytes 
byte[] bytes = new byte[4];
bytes[0] = (byte) (v >>> 24);
bytes[1] = (byte) (v >>> 16);
bytes[2] = (byte) (v >>> 8);
bytes[3] = (byte) (v >>> 0);
return bytes;
voidintToBytes(int v, byte[] bytes)
int To Bytes 
intToBytes(v, bytes, 0);
byte[]intToBytes(int v, final byte[] arr)
Returns a Little-Endian byte array extracted from the given int. 
for (int i = 0; i < 4; i++) {
    arr[i] = (byte) (v & 0XFF);
    v >>>= 8;
return arr;