Java Basics

In this post, we will see about Reference variable in java. Reference variable A variable that holds reference of an object is called a reference variable. Variable is a name that is used to hold a value of any type during program execution. If the type is an object, then the variable is called reference […]

In this post, we will see how to define global variables in java. Unlike C/C++, there are no standard global variables in java but you can still define global variables that can be used across all classes. Global variables are those variables that can be accessed across all the classes. Java does not support global […]

In this post, we will see about how to implement static block in java. Here are some important points about static block in java. Static block is used for static initializations of a class Static block is executed only once when either you create an object of the class or access static member of the […]

Java is one of the most used programming languages in the world for developing the desktop application and web application.It has completed 22 years in the programming world. In this post, we will see how to learn java programming in depth and in most efficient way. Java has a huge learning curve, it is a […]

If any class which is not in same package, we need to import it. If we import that class we can directly access static variables and methods with the class name. If you use static import,  you do not need to use class name any more. Lets understand with the help of example Without using […]

In this post, we will see about final keyword in java. Final keyword can be associated with: variable method class Final is often used when you want restrict others from doing any changes. Let’s go through each by one. Final variable If you make any variable final then you are not allowed to change its […]

In this post, we will see about static keyword in java.So static keyword can be associated with: Variable Method Block Nested class Lets go through each one by one. Static variable: If any instance variable is declared as static.It is known as static variable. [crayon-60081e8f19d96000379827/] Some points about static variables are: Static variable belongs to […]

In this post, we will see about Java default constructor. Default constructor is the no arg constructor which is inserted by compiler unless you provide any other constructor explicitly. You won’t able to see it as it is present in class file rather than source file. Is there any difference between no argument constructor and […]

Constructor in java is block of code which allows you to create instance of the object. It does not have return type. It has two main points Constructor name should be same as class Constructor should not have any return type else it will be same as method. There are three types of Constructor in Java. […]