clean and build in Eclipse

Guys,
Is there any way to do a clean and build in eclipse like we can do it in Netbeans.
I recently moved my perfectly working project from desktop to laptop. I copy pasted the project into the workspace and now its giving me like 100 errors due to build path, library and all other kind of stuffs. it doesnt run, the link doesnt work and all kind of mess up. How do I rebuild it in my laptop.

i did an import and it fixed half the problem but still some of my jsp buttons are not working.

Go to "project" menu and there u can find optons to clean and build.checking the auto build option will build automatically when u make changes to ur code.