21. If a method throws NullPointerException in super class, can we override it with a method which throws RuntimeException? One more tricky Java questions from overloading and overriding concept. Answer is you can very well throw super class of RuntimeException in overridden method but you ca...
It can come in the form of a puzzle. Better be ready for it. The interviewer may test your concurrency knowledge and your deep understanding onwait()andnotify()method calls. Be ready with onedeadlocksource-code example at your fingertips. You will need it. 3. Questions on Patterns and Pr...
publicclassMachine{publicbooleanequals(Machine obj){returntrue; }@TestpublicvoidwhenTwoDifferentMachines_thenReturnTrue(){Objectfirst=newMachine();Objectsecond=newMachine(); assertTrue(first.equals(second)); } } Surprisingly, the test above fails. This is because thisequalsmethod is overloadingObject#...
30 . What are the important things to consider when implementing equals method? 31 . What is the Hashcode method used for in Java? 32 . Explain inheritance with examples . 33 . What is method overloading? 34 . What is method overriding?
30 . What are the important things to consider when implementing equals method? 31 . What is the Hashcode method used for in Java? 32 . Explain inheritance with examples . 33 . What is method overloading? 34 . What is method overriding? 35 . Can super class reference variable can hold...
18. What is overloading and overriding in Java? When we have more than one method with the same name in a single class but the arguments are different, then it is called method overloading. The overriding concept comes into the picture with inheritance when we have two methods with the ...
Method Overriding Learn the difference between method overloading and method overriding in java, which mainly involve method name, signature, parameters list and return type. Polymorphism in Java Polymorphism in Java is the ability to create member functions or fields that behaves differently in ...
The method resetCounter() is used for initializing the counter before any test method is being executed. It also chooses the particular implementation we want to test. In this case we test the non-thread-safe DumbCounter, so we expect to see the test fail. However, when we run the test...
The protected final Class method does not override method in the superclass. The moral is @Override is your friend. do an autofix to apply it uniformly throughout your code base. if you don’t see it somewhere it should appear, something is wrong Minimise overloading simple names. Auto...
In this example, we can see that the method read() has three different forms with different functionalities. This type of polymorphism is static or compile-time polymorphism and is also called method overloading. There is also runtime or dynamic polymorphism, where the child class overrides ...