install linux on a windows machine(repost)

i have just installed windows 7 on my laptop, what i need is to install a linux based operating system. I will just be using the linux operating system for programming, i am new to programming. I need to program in c c++, as well as c# and java. i know that you can use linux for c and c++ but i am not sure about java and c#, if you can then that is fine, if you cant then you have to install the correct ide on windows. you have to install it and then run something to show me that it works.