private static byte [ ] concat ( byte [ ] a , byte [ ] b ) { byte [ ] c = new byte [ a . length + b . length ] ; System . arraycopy ( a , 0 , c , 0 , a . length ) ; System . arraycopy ( b , 0 , c , a . length , b . length ) ; return c ; }
Concatenates two byte arrays and returns the resulting byte array .