Write a public interface named Test with the following behavior:

a. a method getDuration that returns a Duration object.

b. a method check that accepts an int parameter and returns a Result object.

c. a method getScore that returns a double.

The code to this question can be given as:

Code:

public interface Test / /define interface

{

public abstract Duration getDuration (); / /define method

getDuration.

public abstract Result check (int a);

//define method

check.

public abstract double getScore ();

//define method getScore.

}

Explanation:

In the above code, we define an interface that is "Test" inside an interface, we define three methods that can be defined as:

First, we define a method that is "getDuration" that method returns Duration as an object. Second, we define a method that is "check" this method accepts an integer parameter that is a and return Result. The third method is "getScore" this method will return a double value.