title: Unable to run imported project
body: <p>I have a few projects that were previously tested to be working in 1 PC.</p>
  
  <p>I've since moved to another Windows XP PC, and I've setup the development tools on this XP system. I've downloaded and installed the following in order:<br>
  1. Eclipse Classic 3.6.1<br>
  2. JDK v6(jdk-6u23-windows-i586.exe)<br>
  3. Android SDK Tools rev8(installer_r08-windows.exe)<br>
  4. SDK Platform v2.3/2.2, Google APIs, Android API8, rev2, Google USB driver, rev4<br>
  5. ADT 8.0.1</p>
  
  <p>I created a new empty project just to make sure things are working, and I seem to be able to get that new project to run on the emulator just fine. However, when I imported an existing project into the workspace, I get a bunch of errors, such as:
  "The import java.util cannot be resolved"
  "The import android cannot be resolved"</p>
  
  <p>When I look at Project Properties->Java Build Path, it shows "Unable to get system library for the project" under "Libraries" and "Order and Export". What's wrong?</p>
  
  <p>I've also tried copying and pasting the .java files and main.xml files from the imported project to the new project, and it runs correctly...but somehow the imported project doesn't.</p>
  
  <p>Thanks.</p>