In this tutorial, we will discuss super keyword in Java. The super keyword can be used for calling immediate superclass’s instance variable, constructor, and method. Basically, the keyword ‘super’ comes into the picture with the concept of inheritance in Java. So, before going to learn super keyword, you must have familiar … Read more
The term inheritance refers that one class can inherit all of the properties and behavior from another class. It is used for the code reusability. That means code once is written, can be used again and again in the new classes. In the previous tutorial, we have explained inheritance in … Read more
In this tutorial, we will familiar with basic concepts of classes and objects in Java with realtime examples. We know that java is a true object-oriented programming language. In the object-oriented programming language, we can design and develop an application program using classes and objects. The underlying structure of all … Read more
Java Thread Join | The join() method in Java is used when a thread needs to wait for another thread to finish its execution. In other words, this method is used to wait the current thread until the thread that has called the join() method completes its execution. The join() … Read more
What is Upcasting (Widening) When the reference variable of super class refers to the object of sub class, it is known as widening or Upcasting in java. In other words, when sub class object type is converted into super class, it is called widening or upcasting. Let’s understand it with … Read more
Covariant Return Types in Java As you know that in the overriding, the return type of subclass method must be the same as the superclass method return type. But this rule is applicable until Java 1.4 version. In Java 1.5, a new covariant return types feature was introduced. By using this … Read more
In this tutorial, we will discuss 10 main differences between method overloading and method overriding in Java. What is the difference between overloading and overriding in Java? is the most valuable, very important, and repeatedly asked question in any technical interview. Interviewer always hopes three to four differences from your answer. So, … Read more