please make this code in java only.

2. Interfaces to be implemented by first non-abstract class Make an interface 'Testable' that contains a method declaration for display ( ). a) Create a class 'Test' that implements Testable. Compile this class, and write your observations. b) Create another abstract class 'Abs Test implements Testable. Compile this class, and write your observations. Note: Did you notice that methods in an interface are public' by default