JAVA Overview

Overview of Java -

Created in 1991 by James Gosling. It's primary goal WORA(write once run anywhere). Java is OOL but not pure OOL as we have pre defined data types (int, byte, long etc). although we have wrapper class for the same but in pure OOL cant have anything other than object. Second thing we can have operation without calling their methods at objects like String = “ABC” + “A” ;

Java's code are compile into byte code (.class) which is machine independent and hence class file can
be copy to any platform and we can run it on JVM. JVM is platform dependent but class file is independent so java is platform independent programming language.

Features -

Simple

OOPs

Robust

Platform Independent

Secure

Multi-threading

Architectural Neutral

Portable

High Performance

Distributed