How to mock each and every instance of a class

Question

I want to mock my java class in such a ways so that each and every new instance of it should return the mocked response.

Answer 1

There are two mocking libraries which support this: PowerMock (as shown in Matthias' answer), and JMockit.

In the second case, the test only needs to declare a mock field or mock parameter using the @Mocked annotation.