public static byte [ ] intToBytesWithLen ( int x , int len ) { if ( len <= 4 ) { return trailingBytes ( intToBytes ( x ) , len ) ; } else { ByteBuffer bb = ByteBuffer . allocate ( len ) ; bb . position ( len - 4 ) ; bb . putInt ( x ) ; assert bb . remaining ( ) == 0 ; return bb . array ( ) ; } }
Write a big - endian integer into the least significant bytes of a byte array .