Question

Could be dumb question, but how can I pass null to method which takes long or int?

Example:

TestClass{
  public void iTakeLong(long id);
  public void iTakeInt(int id);
}

now how can i pass null to both methos:

TestClass testClass = new TestClass();
testClass.iTakeLong(null); // Compilation error : expected long, got null
testClass.iTakeInt(null);   // Compilation error : expected int, got null

Thoughts, suggestions?

Answer 1

The problem is that int and long are primitives. You can’t pass null to a primitive value.

You can certainly use the wrapper classes Integer and Long instead of long and int in your method signature.