Problem while using ViewPager

I want to use ViewPager in my project. I tried to use code from this link http://developer.android.com/resources/samples/Support4Demos/src/com/example/android/supportv4/app/FragmentPagerSupport.html and i included v4 jar file too. according to this code two class are missing

import android.suppo开发者_Python百科rt.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;

This there some thing wrong with the jar file or i m missing some thing while coding. Plz suggest

Did you link the jar in your project?