How are integers cast to bytes in Java?

Question

I know Java doesn\'t allow unsigned types, so I was wondering how it casts an integer to a byte. Say I have an integer a with a value of 255 and I cast the integer to a byte

Answer 1

According to my understanding, you meant

Integer i=new Integer(2);
byte b=i;   //will not work 

final int i=2;
byte b=i;   //fine 

At last

Byte b=new Byte(2);
int a=b;   //fine

Answer 2

or does it just directly copy the last 8 bits of the integer

yes, this is the way this casting works