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A constructor in Java is a special type of method that is used to initialize the state of an object, assign default values, and perform any essential setup operations. It is automatically called when you create an instance (or an…

A reference variable in Java is a variable that holds the memory address (or reference) of an object rather than the object itself. When you create an object in Java, the object is stored in the heap memory, and the…

When you declare non-static data fields or variables within a class but outside any method, constructor, or block, they are called instance variables in Java. These variables are also called non-static variables in Java because they are not defined with…

In this tutorial, we will learn about variables in Java programming. A variable is a container in Java that holds data or value during the execution of a program. In other words, a variable is a named location in the…

In this tutorial, we will learn about primitive data types in Java. A data type represents the type of data that a variable can hold. For example, you declare a variable like this: In the above declaration, there are three…

The “Hello World!” program in Java or any other programming languages is the first and basic program that beginners write it. The main purpose of writing this program is to understand the basic syntax and structure of the program. Writing…

In this tutorial, you will learn about structure of Java program and its various components with the help of example. Basically, a Java program involves the following components: Documentation Section in Structure of Java Program Documentation is the first section…