Core Java: What ia Java ?

Object Oriented: In Java, everything is an Object. Java can be easily extended since it is based on the Object model.

Platform independent: Unlike many other programming languages including C and C++, when Java is compiled, it is not compiled into platform specific machine, rather into platform independent byte code.This byte code is distributed over the web and interpreted by virtual Machine (JVM) on whichever platform it is being run.

Simple: Java is designed to be easy to learn. If you understand the basic concept of OOP,Java would be easy to master.

Secure: With Java's secure feature, it enables to develop virus-free, tamper-free systems. Authentication techniques are based on public-key encryption.

Architectural-neutral: Java  compiler  generates  an  architecture-neutral  object  file  format, which  makes the compiled code to be executable on many processors, with the presence of Java runtime system.

Portable:  Being  architectural-neutral  and  having  no  implementation  dependent  aspects  of  the specification makes Java portable. Compiler inJava is written in ANSI C with a clean portability boundary which is a POSIX subset.

Robust: Java makes an effort to eliminate error prone situations by emphasizing mainly on compile time error checking and runtime checking.

Multithreaded: With Java's multithreaded feature, it is possible to write programs that can do many tasks simultaneously.  This  design  feature  allows  developers  to  construct  smoothly  running  interactive applications.

Interpreted:Java  byte  code  is  translated  on  the  fly  to  native  machine instructions  and  is  not  stored anywhere. The development process is more rapid and analytical since the linking is an incremental and lightweight process.

High Performance: With the use of Just-In-Time compilers, Java enables high performance.

Distributed:Java is designed for the distributed environment of the internet.

Dynamic: Java  is  considered  to  be  more  dynamic  than  C  or  C++  since  it  is  designed  to  adapt  to  an evolving  environment.  Java  programs  can  carry  extensive  amount  of  run-time  information  that  can  be used to verify and resolve accesses to objects on run-time.