Java Tutorials

In this tutorial, we will learn about Interface in Java. Interface is like an blue print of class. An Interface contain all its variable as static, final and all its methods as abstract. You can say an Interface is a complete Abstract class. We can not instantiate interface same as abstract class we can only use […]

In this tutorial, we will learn about the Abstract class in Java. The main motive of creating an abstract class is to restrict the user to create an object of the class. Abstract classes can only be used with the help of inheritance means we can inherit the abstract class in class. Java provides us “abstract” which we can

In this tutorial, we will learn about the final keyword in Java. The main motive of the final keyword is to restrict the user and final keyword can be used to create three kinds of restriction. These are: final with variable final with method final with class Final keyword in Java with variable: The final keyword is to

In this tutorial, we will learn about Method Overriding in java. If we create a method in the child class with the same name as declared in parent class it is known as Method Overloading. Rules to perform Method Overloading in Java: Method name should be same as declared in Parent class. Parameter of the

In this tutorial we will learn about super keyword in Java. super keyword in java refers to object of Parent class. Super keyword is mainly use to call super class methods or constructor of super class. Usage of super keyword: The super keyword can be used to use the variable of parent class in child class.

In this tutorial we will learn about this Keyword in Java. In very simple words this keyword in Java references to object of the current class. At present, it might be sound confusing. But you will find it easy after checking the following example: Example code: Class ThisExample{ String name; public ThisExample(String name){ this.name=name; } public void show(){

In this tutorial, we will learn about Inheritance in Java. Inheritance is a mechanism in which we can inherit properties(methods and variable) of one class into another. This helps us to create a new class that will have its own properties and properties of its parent class(from which the new class is inheriting features). While performing

In this tutorial, we will learn about Method Overloading in Java. When we create more than methods in a class with the same name it is known as Method Overloading in Java. The main motive behind this concept is to keep code more readable and easy. Some rules to perform method overloading in Java. Name

In this tutorial, we will learn about Static block in Java. A very important thing about the static block is the static block belongs to class not to instance. That’s why static block only runs once it doesn’t matter how many numbers of instance we create. There are few things to note about the static block

In this tutorial, we will learn about Instance block in Java. Instance blocks are used to initialize instance variables of the class. These blocks run every time when we create an object of the class. There are few things to note about instance blocks. we do not right any identifier with instance block instance block