Compare two List objects

 
import java.util.List;
public class CollectionUtil
{
  public static boolean sameElements(List firstList, List secondList)
  {
    if (firstList.size() != secondList.size())
    {
      return false;
    }
    for (int index = 0; index < firstList.size(); index++)
    {
      // Check if the element is also in the second list.
      if (!secondList.contains(firstList.get(index)))
      {
        return false;
      }
    }

    // They heve the same elements.
    return true;

  }

}