Java History and Features

Power of Java 

Java - A bridge to communicate 

James Gosling, Mike Sheridan, and Patrick Naughton initiated the Java language project in June 1991. Java was originally designed for interactive television. The language was initially called Oak and was later renamed Java, from Java coffee. Sun Microsystems released the first public implementation as Java 1.0 in 1995. It promised "Write Once, Run Anywhere" (WORA).

By Wikipedia

Java Features

1. Compiler/Interpreter Combo

    Code is compiled to bytecodes that are interpreted by a Java virtual machines (JVM) .

    This provides portability to any machine for which a virtual machine has been written.

    The two steps of compilation and interpretation allow for extensive code checking and improved security.

2. Object Oriented

    No coding outside of class definitions, including main().

    An extensive class library available in the core language packages.

3. Platform Independence

    The Write-Once-Run-Anywhere ideal has not been achieved (tuning for different platforms usually required), but closer than with other languages.

4. Robust

    Exception handling built-in, Data must be declared an explicit type, local variables must be initialized.

   

5. Automatic Memory Management

    Automatic garbage collection by JVM.

6. Security

    bytecode verifier - checks classes after loading

    class loader - confines objects to unique namespaces. Prevents loading a hacked "java.lang.SecurityManager" class, for example.

    security manager - determines what resources a class can access such as reading and writing to the local disk.

7. Dynamic Binding

    The linking of data and methods to where they are located, is done at run-time.

    New classes can be loaded while a program is running. Linking is done on the fly.

    Even if libraries are recompiled, there is no need to recompile code that uses classes in those libraries.

8. Good Performance

    Advanced virtual machines and just-in-time compilation and other techniques now typically provide performance up to 50% to 100%.

9. Threading

    Lightweight processes, called threads, can easily perform multiprocessing.

    Can take advantage of multiprocessors where available

    Great for multimedia displays.

10. Built-in Networking

    Java was designed with networking in mind and comes with many classes to develop sophisticated       Internet communications.

11. Elimination of Unsecured elements

    No memory pointers

    No preprocessor

    Array index limit checking

Funny Quotes :-

“If debugging is the process of removing bugs, then programming must be the process of putting them in.” (Edsger W. Dijkstra)