import java.util.List;
import java.util.ArrayList;

/**
 * Class to do work on a list of strings
 */
public class StringListWorker2
{
  /** holds a list of strings */
  private List<String> stringList = null;
  
  /** Constructor that takes a list of strings 
    * @param theList the list to use
    */
  public StringListWorker2(List<String> theList)
  {
    this.stringList = theList;
  }
  
  /**
   * Method to return a new list that has every other
   * string in it from the original list of strings in stringList
   * @return an ArrayList with every other item in it from the 
   * original list of strings
   */
  public List<String> getEveryOther()
  {
  }
  
  /**
   * Method to return the number of strings that contain the
   * passed substring
   * @param sub the substring to look for
   * @return the count of the number of strings in the list that 
   * contain the passed substring or 0 if none.
   */
  public int getCount(String sub)
  {
  }
  
  /**
   * Method to return a new list of strings that contains the 
   * same strings as in the original but in reverse order
   * @return a new list of strings in reverse order
   */
  public List<String> reverse()
  {
  }
  
 public static void main(String[] args)
  {
    List<String> theList = new ArrayList<String>();
    theList.add("bug");
    theList.add("bear");
    theList.add("bat");
    theList.add("lake");
    theList.add("pool"); 
    theList.add("bake");
    theList.add("horse");
    StringListWorker2 worker = new StringListWorker2(theList);
    List<String> everyOtherList = worker.getEveryOther();
    if (everyOtherList.size() != 4) System.out.println("error in every other list");
    System.out.println("after every other");
    for (String currString : everyOtherList)
      System.out.println(currString);
    int count = worker.getCount("ak");
    System.out.println("count of ak is " + count);
    if (count != 2) System.out.println("error in getCount for ak");
    count = worker.getCount("zeb");
    System.out.println("count of zeb is " + count);
    if (count != 0) System.out.println("Error in getCount for zeb");
    List<String> revList = worker.reverse();
    System.out.println("after reverse");
    for (String currString : revList)
      System.out.println(currString);
  }
  
}