Consider the definition of the Measurable interface and the code snippet defining the Inventory class: The compiler complains that the getMeasure method has a weaker access level than the Measurable interface.Why?
A)The getMeasure method was declared as private in the Measurable interface.
B)The variable onHandCount was not declared with public access.
C)All of the methods in a class have a default access level of package access, while the methods of an interface have a default access level of private.
D)All of the methods in a class have a default access level of package access, while the methods of an interface have a default access level of public.

Question

Consider the definition of the Measurable interface and the code snippet defining the Inventory class:  The compiler complains that the getMeasure method has a weaker access level than the Measurable interface.Why? 
A)The getMeasure method was declared as private in the Measurable interface. 
B)The variable onHandCount was not declared with public access. 
C)All of the methods in a class have a default access level of package access, while the methods of an interface have a default access level of private. 
D)All of the methods in a class have a default access level of package access, while the methods of an interface have a default access level of public.

Quizplus · Accepted Answer

In Java, all methods in a class have a default access level of package access (also known as "default" or "package-private"), which means they can only be accessed within the same package. On the other hand, all methods in an interface have a default access level of public, which means they can be accessed from anywhere.

In this case, the error message indicates that the getMeasure method of the Inventory class has a weaker access level than the Measurable interface. This means that the getMeasure method in the Inventory class has a lower access level than the default public access level of the getMeasure method in the Measurable interface.

Therefore, the best choice is D, which correctly explains the default access levels of methods in classes and interfaces.

Consider the Definition of the Measurable Interface and the Code