In Java, the type of int is strongly converted to byte, and after a strong conversion to byte, the data exceeds the expression range of byte.

public class Aa {

public static void Main (string[] args) {byte i = 88;  byte R = 68;    byte F = (byte) (i + R); System.out.println (f);

}

}

Output is-100

88+68=156; binary is represented as: 1001 1100, after casting to byte, because Byte is signed, the value range is: -128-127;1001 1100 is a byte number of the complement, we convert it to the original code, that is, minus one after the reverse, but the sign bit can not change, Get: 1110 0100, this number is--100.

Summary: (88+68) -127+ (-128)-1

In Java, the type of int is strongly converted to byte, and after a strong conversion to byte, the data exceeds the expression range of byte.