Question: When Should A Method Be Private?

What is the point of private variables?

Making a variable private “protects” its value when the code runs.

At this level, we are not concerned with protecting it from other programmers changing the code itself.

The point of so-called “data hiding” is to keep internal data hidden from other classes which use the class..

Can we override private method in Java?

No, we cannot override private or static methods in Java. Private methods in Java are not visible to any other class which limits their scope to the class in which they are declared.

Can we write test cases for private methods?

Strictly speaking, you should not be writing unit tests that directly test private methods. … If another developer wants to make a small internal change to the class, which doesn’t affect the classes public contract, he/she then has to modify your reflection based test to ensure that it works.

When should a method be public?

Methods can be public, protected, private or have package scope. Methods should be public unless they break the ClassInvariant. Proponents of having only public methods argue that: 1.

How do you test private methods?

So whether you are using JUnit or SuiteRunner, you have the same four basic approaches to testing private methods:Don’t test private methods.Give the methods package access.Use a nested test class.Use reflection.

Why you should not test private methods?

The short answer is that you shouldn’t test private methods directly, but only their effects on the public methods that call them. … The test should only be accessing the class’ public interface. If an object is hard to test via its public interface, it is going to be hard to use in the production code.

Are private methods final?

When we use final specifier with a method, the method cannot be overridden in any of the inheriting classes. Methods are made final due to design reasons. Since private methods are inaccessible, they are implicitly final in Java.

Should I mock private methods?

The private methods on a class should be invoked by one or more of the public methods (perhaps indirectly – a private method called by a public method may invoke other private methods). … So – don’t mock your private methods.

Should we write junit for private methods?

You generally don’t unit test private methods directly. Since they are private, consider them an implementation detail. Nobody is ever going to call one of them and expect it to work a particular way. You should instead test your public interface.

Are private methods bad?

Private methods are not necessarily a bad thing to be avoided at all costs. Making private methods public don’t automatically lead to better design; it can also lead to an unnecessary inflated API, weak encapsulation, and increased maintenance overhead.

Can we override private and final methods?

No, We can not override private method in Java, just like we can not override static method in Java. … private methods are not even visible to Child class, they are only visible and accessible in the class on which they are declared. private keyword provides highest level of Encapsulation in Java.

Can you override private methods?

No, a private method cannot be overridden since it is not visible from any other class. You have declared a new method for your subclass that has no relation to the superclass method.