Java Programming Language – GeeksforGeeks

Java is one of the most popular and widely used programming languages.

• Java has been one of the most popular programming languages for many years.
• Java is Object Oriented. However, it is not considered as pure object-oriented as it provides support for primitive data types (like int, char, etc)
• The Java codes are first compiled into byte code (machine-independent code). Then the byte code runs on Java Virtual Machine (JVM) regardless of the underlying architecture.
• Java syntax is similar to C/C++. But Java does not provide low-level programming functionalities like pointers. Also, Java codes are always written in the form of classes and objects.
• Java is used in all kinds of applications like Mobile Applications (Android is Java-based), desktop applications, web applications, client-server applications, enterprise applications, and many more.
• When compared with C++, Java codes are generally more maintainable because Java does not allow many things which may lead to bad/inefficient programming if used incorrectly. For example, non-primitives are always references in Java. So we cannot pass large objects (like we can do in C++) to functions, we always pass references in Java. One more example, since there are no pointers, bad memory access is also not possible.
• When compared with Python, Java kind of fits between C++ and Python. The programs are written in Java typically run faster than corresponding Python programs and slower than C++. Like C++, Java does static type checking, but Python does not.

Simple Hello World Program :

// A Java program to print "Hello World" 
public class GFG { 
    public static void main(String args[]) 
    { 
        System.out.println("Hello World"); 
    } 
}

Output:

Hello World

Recent Articles on Java

Java Programs – Basics to Advanced

Overview, Basics, Input/Output, Flow Control, Operators, Strings, Arrays, OOPs Concepts, Inheritance, Abstraction, Encapsulation, Polymorphism, Constructors, Methods, Interfaces, Wrapper Classes, Keywords, Access Modifiers, Memory Allocation, Classes, Packages, Collection Framework, List, Queue, Map, Set, Exception Handling, Multithreading, Synchronization, File Handling, Regex, Java IO, Networking, Java 8 Features, Date & Time, JDBC, Miscellaneous, Interview Questions

GeeksforGeeks Courses:

Java Programming Foundation – Self Paced Course

Do you really think that you need some prior programming knowledge to learn JAVA? Well, we don’t think so! Now you can start learning JAVA from scratch with so much ease with our Java Programming Foundation Course. A self-paced course to help you learn about JAVA basic concepts, data types, operators, functions & much more. To start your learning journey. Enrol now!

Live Courses

Get best-in-industry real-time GFG Live Courses to upgrade yourself and get into your dream company. You can attend these live classes from any geographical location and here you can ask your doubts to the instructor just like an offline classroom program. Do check out these worthwhile Live Courses by GeeksforGeeks- System Design Live, Competitive Programming Live, and more!