1) Java programming language is very simple and object-oriented. It’s easy to learn and taught in many colleges and universities.

2) As mentioned above,Java application run inside a Java Virtual Machine and now all major operating systems are able to run Java including Windows,Mac OS and UNIX.

3) Write one and run anywhere,a java application runs on all java platforms

4) Java technologies have been improved by community involvement. This means it is suitable for most types of applications especially complex systems that are used widely in network and distributed computing

5) Java is also secure. Only Java applications that have permission can access the resources of the main computer. This means that the main computer is protected from virus attackers and hackers.