Java language was born in 1995, it consists of three modules: JavaSE, JavaEE, JavaME, which is the foundation JavaSE.
Java has the simplicity, various features of an object-oriented, portable, multi-linear, robustness, security and the like.
With respect to the terms of C ++, Java does not support multiple inheritance and shield the concept of pointers. Java is a pure object-oriented, easier to understand.
Portability: Java programs can be done once, run everywhere. That is, without any modification of the same Java program can run directly on Windows, you can also run directly on Linux, this is called or called Java portability across platforms. (Mainly by JVM completed)