What is Java?

Java is a high-level, class-based, object-oriented programming language designed to have as few implementation dependencies as possible. It is widely used for building large-scale enterprise applications, web applications, mobile apps, games, and even embedded systems. Some key features of Java include -

Platform Independence: Java code is written once and can be run anywhere (WORA) because it is compiled into bytecode, which can run on any system that has the Java Virtual Machine (JVM).

Object-Oriented: Java emphasizes creating objects that contain both data and methods, which encourages modular, reusable code.

Security: Java has built-in security features, such as bytecode verification and a security manager that defines access rules for classes.

Automatic Memory Management: Java has a garbage collector that automatically manages memory allocation and deallocation, which reduces the chance of memory leaks.

Rich API: Java comes with a large standard library that provides many classes and methods to handle various tasks, like data structures, networking, file I/O, and concurrency.

Multithreading: Java provides built-in support for multithreading, allowing multiple operations to run concurrently.

Java is commonly used in large-scale applications, Android app development, and web applications using technologies like Spring and Java EE.

What is the JVM?

Types of JVM

Hotspot JVM vs OpenJ9 JVM