question: public void testZeroOne ( ) { String numA = "0" ; String numB = "1" ; String res = "1" ; BigInteger aNumber = new BigInteger ( numA ) ; BigInteger bNumber = new BigInteger ( numB ) ; BigInteger result = aNumber . xor ( bNumber ) ; assertTrue ( res . equals ( result . toString ( ) ) ) ; }
target:  Xor for zero and one