Definition
- Java is a high-level, object-oriented programming language known for its portability, security, and ease of use. It follows the principle of “write once, run anywhere” (WORA), meaning that Java code can run on any system equipped with the Java Virtual Machine (JVM). This portability has made Java one of the most widely adopted languages globally.
Example
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World!");
}
}
Features
- Java encourages modular and reusable code through object-oriented principles like inheritance, encapsulation, and polymorphism.
- Java code can run on any platform with a JVM, making it highly portable.
- Java’s garbage collector handles memory allocation and deallocation automatically.
- Java supports concurrent execution, allowing multiple tasks to run in parallel.
- Java provides features like bytecode verification and security policies to protect against malicious code.
Advantages
- Java programs can run on any system with a JVM, increasing portability.
- Java offers good performance through Just-In-Time (JIT) compilation and efficient memory management.
- Java has a vast ecosystem of libraries and frameworks, enabling rapid development.
- Java is well-suited for building large, scalable enterprise applications.
Uses
- Java is commonly used in server-side development with frameworks like Spring and Java EE.
- Java has been a key language for Android app development.
- Java is widely used in building large-scale, secure enterprise applications.
- Java is used for programming devices with limited resources, such as sensors and IoT devices.
