Thread: Not sure what I'm supposed to do...

So today I got this programming assignment which is due in a week but I don't even understand what is being asked of me. Since my professor sucks at getting back to me via email, I have come to the internet for help.

Create two implementations of the StringLogInterface interface as provided on [our school's website].
One of your implementations must use an array for storage and the other must use a linked list for storage. You may not use any of the pre-defined Linked List classes, nor may you use an ArrayList.

This was given to us on our school website:

package stringLogs;
 
public interface StringLogInterface
{
  void insert(String element);
  // Precondition:   This StringLog is not full.
  // 
  // Places element into this StringLog.
 
  boolean isFull();
  // Returns true if this StringLog is full, otherwise returns false.
 
  int size();
  // Returns the number of Strings in this StringLog.
 
  boolean contains(String element);
  // Returns true if element is in this StringLog,
  // otherwise returns false.
  // Ignores case differences when doing string comparison.
 
  void clear();
  // Makes this StringLog empty.
 
  String getName();
  // Returns the name of this StringLog.
 
  String toString();
  // Returns a nicely formatted string representing this StringLog.
 
  int howMany(String element);
  // Returns an int value indicating how many times element occurs
  // in the StringLog.
 
  boolean uniqueInsert(String element);
  // This method inserts element into the StringLog unless an identical
  // string already exists in the StringLog, in which case, it has 
  // no effect on the StringLog. If it does insert the string, it 
  // retuns true; otherwise it returns false. 
 
  String smallest();
  // This method returns the smallest string in the StringLog. By 
  // "smallest", we mean in terms of the lexicographic ordering
  // supported by the String class's compareTo method. As a 
  // precondition, you should assume that the StringLog is not
  // empty. 
}

How do I get started? I'm not asking for anyone to write my code for me, just help me get started please! Thank you.