access modifiers in Java helps to restrict the scope of a class, constructor , variable , method or data member. The four access levels are − default (package-private) – also known as package access, the member can be accessed by any class within the same package private – the member can only be accessed by other members within …
A java method is a block of code which only runs when it is called.You can pass data, known as parameters, into a method.Methods are used to perform operations, and they are also known as functions. Method Definition methods must be declared within classes. It is defined with the name of the method, followed by parentheses (). Java …
Variables are basically the containers that store the value inside them. Every time we declare a variable, we need to specify the type that will define the kind of value which will be stored in the variable. in short Variables are used to store values in computer’s memory. Declaring Variables in Java To declare a variable, …
What is null? null is a very important concept in Java. The original intention of inventing null was to denote the absence of something. But over the years it has troubled Java developers with the nasty NullPointerException. Before we start, let’s recall and understand what is variable and what is a value? Variables are basically …
