
The library.jar file contains two packages.
   two.three
   two.four

The two.three package contains the two.three.Three class.
The two.four package contains the two.four.Four class.

Here is the source for two.three.Three.

package two.three;
public class Three
{
   public static void printMessage()
   {
      System.out.println("Hello from Three.");
   }
}


Here is the source for two.four.Four.

package two.four;
public class Four
{
   public static void printMessage()
   {
      System.out.println("Hello from Four.");
   }
}
