question: public static int [ ] createMSBMask ( int bits ) { int m = 0 , orig = 32 - bits ; while ( bits -- > 0 ) { m |= 1 ; m <<= 1 ; } while ( -- orig > 0 ) { m <<= 1 ; } return new int [ ] { ( m > > 24 ) & 0xFF , ( m > > 16 ) & 0xFF , ( m > > 8 ) & 0xFF , m & 0xFF } ; }
target:  Creates a 4 byte bit-mask based on the amount of bits provided shifted to MSB