aviparida wrote:
how to install different versions of java in single machine
Find the version you want and install it - simple. You can run different versions of the JVM at the same time, there should be no conflict between them.
aviparida wrote:
help in writing the source code
First step is to work out how you would do it manually, then automate the approach. Sorry I won't write your code for you; try google.
aviparida wrote:
how can i change different files in registry using java
The registry is an MS specific thing. Try and keep your java platform independent.