Conversion between byte group and integer

C # integer occupies 4 bytes and should be stored in a 4-byte array. However, you can use the following method to store an integer smaller than 16777215 to a 3-byte array: </P> <p> int A = 999999; <br/> int B = 0; <br/> // converts an integer to a 3-byte array <br/> byte [] mytest = new byte [3]; <br/> mytest [0] = (byte) (A & 0xff); <br/> mytest [1] = (byte) (A> 8) & 0xff); <br/> mytest [2] = (byte) (A> 16) & 0xff ); <br/> // converts a 3-byte array to an integer. <br/> B = mytest [0] + (mytest [1] <8) + (mytest [2] <16); </P> <p>