In Java XOR with three true inputs returns true. Why?

Question

The following code

System.out.println(\"1 0 0: \" + (true ^ false ^ false));
System.out.println(\"1 0 1: \" + (true ^ false ^ true));
System.out.println(\"1 1 0:         


        

Answer 1

If you want a true result, if one and only one inputs is true you can use:

(a ^ b ^ c ) ^ ( a && b && c )

the test case result:

true true true = false
true true false = false
true false true = false
true false false = true
false true true = false
false true false = true
false false true = true
false false false = false