java how to convert int to Byte array, and how to assign int value to Byte

Byte only have a constructor which takes Byte itself, so anything like

Byte b = new Byte(1);

or

Byte b = 1;

will all fail;

 

The easiest way to assign int to Byte is using the empty constructor, then = operator.

Byte b;

b = 1;

To convert int to Byte array, try the following:

t[0] =(Byte)( foo >> 24 );
t[1] =(Byte)( (foo << 8) >> 24 );
t[2] =(Byte)( (foo << 16) >> 24 );
t[3] =(Byte)( (foo << 24) >> 24 );