Jar file not loading in eclipse

Question

I created a jar file and would like to implement it into my other projects. However, I am getting an error "cannot be resolved to a type." I added the .jar file to the Build Path Libraries within eclipse but the error persists.

EDIT: I tried following the tutorial here: http://www.programcreek.com/2011/07/build-a-java-library-for-yourself/

However, this still does not work.

System.out.println(Simple.add(1,2));

I get the error "Cannot be resolved" on the Simple class name.

EDIT:

package TEST;
public class AccessSimple
{
   public void access()
   {
      System.out.println(Simple.add(1, 2));
   }
}

Here is the class I am using to access my jar file. It is not part of the default package.

Answer 1

Try to do a refresh in the project to see if it works then. Otherwise try clean. Then build and refresh. Finally perform a restart of eclipse

EDIT I read somewhere that if you try Windows–>Preferences–>Java–>Compiler–>Building–>Output folder–>”Rebuild class files modified by others” will work. Give it a try and tell me to search better

Answer 2

Check the "Java Complier" version used to build the jar file against the "Java Compiler" version of your project. If the jar you are including was built with a higher version than the compiler version of your project, the compiled class might not be found.