Month: February 2022

Modifiers are keywords that you add to those definitions to change their meanings. Java language has a wide variety of modifiers, including the following − Java Access Modifiers Non Access Modifiers To use a modifier, you include its keyword in the definition of a class, method, or variable. The modifier precedes the rest of the… Continue reading Modifier Types

A variable provides us with named storage that our programs can manipulate. Each variable in Java has a specific type, which determines the size and layout of the variable’s memory; the range of values that can be stored within that memory; and the set of operations that can be applied to the variable. You must… Continue reading Variable Types

Variables are nothing but reserved memory locations to store values. This means that when you create a variable you reserve some space in the memory. Based on the data type of a variable, the operating system allocates memory and decides what can be stored in the reserved memory. Therefore, by assigning different data types to… Continue reading Basic Datatypes

A constructor initializes an object when it is created. It has the same name as its class and is syntactically similar to a method. However, constructors have no explicit return type. Typically, you will use a constructor to give initial values to the instance variables defined by the class, or to perform any other start-up… Continue reading Constructors

In this chapter, we will look into the concepts – Classes and Objects. Object − Objects have states and behaviors. Example: A dog has states – color, name, breed as well as behaviors – wagging the tail, barking, eating. An object is an instance of a class. Class − A class can be defined as a template/blueprint… Continue reading Object and Classes

About Java programs, it is very important to keep in mind the following points. Case Sensitivity − Java is case sensitive, which means identifier Hello and hello would have different meaning in Java. Class Names − For all class names the first letter should be in Upper Case. If several words are used to form a name of the class, each… Continue reading Basic Syntax