Does Java allow nullable types?

Question

In C# I can a variable to allow nulls with the question mark. I want to have a true/false/null result. I want to have it set to null by default. The boolean will be set to true/false by a test result, but sometimes the test is not run and a boolean is default to false in java, so 3rd option to test against would be nice.

c# example:

bool? bPassed = null; 

Does java have anything similar to this?

Answer 1

No.

Instead, you can use the boxed Boolean class (which is an ordinary class rather a primitive type), or a three-valued enum.

Answer 2

you can use :

Boolean b = null;

that is, the java.lang.Boolean object in Java.

And then also set true or false by a simple assignment:

Boolean b = true; or Boolean b = false;