#java

code What is the difference between an abstract method and a concrete method in Java?

In Java, an abstract method is a method that is declared, but not defined, in an abstract class or interface. The method definition is left to the... Read more

code What is the difference between an interface and an abstract class in Java?

In Java, both interfaces and abstract classes are used to implement abstraction, a key concept in Object-Oriented Programming (OOP). Abstraction is... Read more

code What is the difference between the super() and this() keywords in Java?

The super() and this() keywords are used in Java to refer to the parent class and the current instance of the class, respectively. While both of... Read more

code How does exception handling work in Java?

Exception handling in Java is a way to handle errors and exceptional situations that can arise during the execution of a program. It is a mechanism... Read more

data_usage What is the difference between a HashSet and a TreeSet in Java?

Both HashSet and TreeSet are two important classes in Java's Collection Framework that are used to store a collection of elements, but there are some... Read more

code What is the purpose of the assert keyword in Java?

The assert keyword in Java is used as a debugging aid to check assumptions made by the program. It is typically used to check for conditions that... Read more