a . Mercury b . Mars c . Compilation fails d . Runtime exception
this is the Question i try it on the compiler 1.5 . the correct answer is Mercury.
But I got this form some simulator where the Question answer is as follows : ------------------- c . Compilation fails
All constructions for b1 to b4 are valid. b1 is a Boolean object (created through the Boolean wrapper class) with a value of true. b2 is a boolean primitive with value as true. b3 and b4 are both Boolean objects with the same value of false. b3 and b4 are created through the static Boolean valueOf( ) method. This method accepts primitive boolean values or case-insensitive string representation of the boolean values. If you input an unrecongized boolean value or the null literal, the valueOf( ) method will simply return a Boolean object with a false value.
Nevertheless, Boolean objects created through the Boolean wrapper class cannot be used as an expression in a boolean test. A Boolean object is not the same as a boolean primitive. Therefore, the compilation fails at the if clause. Beware of such trick question.
------------------------ pls any one can reply me for this question what is the correct answer for that .