Java Programming Basics (original) (raw)

Last Updated : 02 Jan, 2025

Java is one of the most popular and widely used programming language and platform. A platform is an environment that helps to develop and run programs written in any programming language. Java is fast, reliable and secure. From desktop to web applications, scientific supercomputers to gaming consoles, cell phones to the Internet, Java is used in every nook and corner.

However to become proficient in any programming language, one Firstly needs to understand the basics of that language.

Therefore, below are the basics of Java in the format in which it will help you the most to get the headstart:

1. Java Environment: The programming environment of Java consists of three components mainly:
   • JDK
   • JRE
   • JVM
     Learn about setting up the Java environment here: Setting up the environment in Java
2. Java Basic Syntax : Every programming language has its own set of rules to declare, define and work on its components. Reading and learning about all of them together is difficult. Therefore here is a simple task of printing “Hello World” in Java . During this process, major components and their syntaxes are explained clearly. Learn about printing “Hello World” in Java here: Beginning Java programming with Hello World Example
3. Comments in Java : In a program, comments take part in making the program become more human-readable by placing the detail of code involved and proper use of comments makes maintenance easier and finding bugs easily. Comments are ignored by the compiler while compiling the code. Learn about Comments in Java here: Comments in Java
4. Data Types in Java : Each variable in Java has an associated data type. Each data type requires different amounts of memory and has some specific operations which can be performed over it. Learn about different data types in Java here: Data types in Java
5. Variables in Java : A variable is the name given to a memory location. It is the basic unit of storage in a program. Learn about Variables in Java here: Variables in Java
6. Keywords in Java : Keywords or Reserved words are the words in a language that are used for some internal process or represent some predefined actions. These words are therefore not allowed to use as variable names or objects. Doing this will result in a compile-time error. Learn about Keywords in Java here: Keywords in Java
7. Operators in Java : Operators are the foundation of any programming language. Thus the functionality of Java programming language is incomplete without the use of operators. We can define operators as symbols that help us to perform specific mathematical and logical computations on operands. In other words, we can say that an operator operates the operands. Learn about Operators in Java here: Operators in Java
8. Decision Making (Control Statements) in Java : Decision Making in programming is similar to decision making in real life. In programming also we face some situations where we want a certain block of code to be executed when some condition is fulfilled. A programming language uses control statements to control the flow of execution of the program based on certain conditions. These are used to cause the flow of execution to advance and branch based on changes to the state of a program. Learn about Decision Making in Java here: Decision Making in Java
9. Loops in Java : Looping in programming languages is a feature which facilitates the execution of a set of instructions/functions repeatedly while some condition evaluates to true. Java provides three ways for executing the loops. While all the ways provide similar basic functionality, they differ in their syntax and condition checking time. Learn about Loops in Java here: Loops in Java

Similar Reads

• Learn Java - A Beginners Guide for 2024 If you are new to the world of coding and want to start your coding journey with Java, then this learn Java a beginners guide gives you a complete overview of how to start Java programming. Java is among the most popular and widely used programming languages and platforms. A platform is an environme 10 min read
• How to Start Learning Java? Java is one of the most popular and widely used programming languages and platforms. A platform is an environment that helps to develop and run programs written in any programming language. Java is fast, reliable, and secure. From desktop to web applications, scientific supercomputers to gaming cons 8 min read
• Java Programming Basics Java is one of the most popular and widely used programming language and platform. A platform is an environment that helps to develop and run programs written in any programming language. Java is fast, reliable and secure. From desktop to web applications, scientific supercomputers to gaming console 4 min read
• How JVM Works - JVM Architecture JVM(Java Virtual Machine) runs Java applications as a run-time engine. JVM is the one that calls the main method present in a Java code. JVM is a part of JRE(Java Runtime Environment). Java applications are called WORA (Write Once Run Anywhere). This means a programmer can develop Java code on one s 7 min read
• Java OOP(Object Oriented Programming) Concepts Java Object-Oriented Programming (OOPs) is a fundamental concept in Java that every developer must understand. It allows developers to structure code using classes and objects, making it more modular, reusable, and scalable. The core idea of OOPs is to bind data and the functions that operate on it, 13 min read
• Classes and Objects in Java In Java, classes and objects are basic concepts of Object Oriented Programming (OOPs) that are used to represent real-world concepts and entities. The class represents a group of objects having similar properties and behavior, or in other words, we can say that a class is a blueprint for objects, wh 12 min read
• Java Constructors In Java, constructors play an important role in object creation. A constructor is a special block of code that is called when an object is created. Its main job is to initialize the object, to set up its internal state, or to assign default values to its attributes. This process happens automaticall 10 min read
• Java Methods Java Methods are blocks of code that perform a specific task. A method allows us to reuse code, improving both efficiency and organization. All methods in Java must belong to a class. Methods are similar to functions and expose the behavior of objects. Example: Java program to demonstrate how to cre 8 min read
• Java Strings In Java, a String is the type of object that can store a sequence of characters enclosed by double quotes, and every character is stored in 16 bits, i.e., using UTF 16-bit encoding. A string acts the same as an array of characters. Java provides a robust and flexible API for handling strings, allowi 10 min read
• Arrays in Java Arrays in Java are one of the most fundamental data structures that allow us to store multiple values of the same type in a single variable. They are useful for storing and managing collections of data. Arrays in Java are objects, which makes them work differently from arrays in C/C++ in terms of me 15+ min read