What is Java:
Java was introduced by James Gosling.Java is a high-level, object-oriented programming language developed by Sun Microsystems (now owned by Oracle) and released in 1995. It is known for its "write once, run anywhere" capability, meaning compiled Java code can run on any device or operating system that supports the Java Virtual Machine (JVM) without needing recompilation.
Features of java:
**Object-Oriented Programming (OOP): **Java supports OOP concepts to create modular and reusable code.
** Platform Independence:** Java programs can run on any operating system with a JVM.
Robust and Secure: Java ensures reliability and security through strong memory management and exception handling.
** Multithreading and Concurrency:** Java allows concurrent execution of multiple tasks for efficiency.
Rich API and Standard Libraries: Java provides extensive built-in libraries for various programming needs.
** Frameworks for Enterprise and Web Development:** Java supports frameworks that simplify enterprise and web application development.
Open-Source Libraries: Java has a wide range of libraries to extend functionality and speed up development.
** Maintainability and Scalability:** Java’s structured design allows easy maintenance and growth of applications.
Example:
// A Java program to print Hello World!
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello World!");
}
}
**
How to run the above code?**
Write code in a file like HelloWorld.java.
The Java Compiler "javac" compiles it into bytecode "HelloWorld.class".
The JVM (Java Virtual Machine) reads the .class file and interprets the bytecode.
JVM converts bytecode to machine readable code i.e. "binary" (001001010) and then execute the program.
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