Java - Convert int to Byte Array of 4 Bytes? [duplicate]
You can convert yourInt to bytes by using a ByteBuffer like this:
return ByteBuffer.allocate(4).putInt(yourInt).array();Beware that you might have to think about the byte order when doing so.
public static byte[] my_int_to_bb_le(int myInteger){ return ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt(myInteger).array();}public static int my_bb_to_int_le(byte [] byteBarray){ return ByteBuffer.wrap(byteBarray).order(ByteOrder.LITTLE_ENDIAN).getInt();}public static byte[] my_int_to_bb_be(int myInteger){ return ByteBuffer.allocate(4).order(ByteOrder.BIG_ENDIAN).putInt(myInteger).array();}public static int my_bb_to_int_be(byte [] byteBarray){ return ByteBuffer.wrap(byteBarray).order(ByteOrder.BIG_ENDIAN).getInt();}
This should work:
public static final byte[] intToByteArray(int value) { return new byte[] { (byte)(value >>> 24), (byte)(value >>> 16), (byte)(value >>> 8), (byte)value};}Code taken from here.
Edit An even simpler solution is given in this thread.