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 Java is a programming language at first developed by James Gosling at Sun Microsystems (which has as combined into Oracle Corporation) and discharged in 1995 as a core component of Sun Microsystems' Java platform. The language derives much of its syntax from C and C++ but has an easier object model and fewer low-level facilities. Java applications are usually compiled to byte code (class file) that can run on any Java Virtual Machine (JVM) despite of computer architecture. Java is a common-purpose, concurrent, object-oriented language, class-based, that is purposely designed to have as few implementation dependencies as possible. It is proposed to let application developers "write once, run anywhere" (WORA), meaning is that code that runs on one platform does not require to be recompiled to run on another. Java is at present date missing one of the most accepted programming languages in use, particularly for client-server web applications, with a stated 10 million users.

There were 5 most important objectives in the creation of the Java language:

• Java is easy, object-oriented and familiar"
• Java is  "robust and secure"
• Java "interpreted, threaded, and dynamic"
•  Java is "architecture-neutral and portable"
• Java can be executed with "high performance"

 Java platform

One feature of Java is portability, which stands for that computer programs written in the Java language must run likewise on any hardware/operating-system platform. This is completed by compiling the Java language code to an intermediate representation called Java bytecode, in its place of straight to platform-specific machine code. Java bytecode instructions are equivalent to machine code, but are planned to be interpreted by a virtual machine (VM) written specially for the host hardware. End-users commonly make use of a Java Runtime Environment (JRE) installed on their personal machine for standalone Java applications or in a Web browser for Java applets.

Standardized libraries give a generic method to access host-specific features for example graphics, threading and networking.

A major advantage of using bytecode is porting. Though, the overhead of interpretation means that interpreted programs approximately always run more bit by bit than programs compiled to indigenous executables would. Just-in-Time (JIT) compilers were initiated from an early stage that compiles bytecodes to machine code through runtime.