code: private int compareToLRU( CacheEntry other ) {
  
          int cmp = compareTime( other );
          if ( cmp != 0 ) {
              return cmp;
          }
  
  
          cmp = compareOrder( other );
          if ( cmp != 0 ) {
              return cmp;
          }
  
  
          return compareReadCount( other );
      }
docs: Compare the time.
  @param other other entry to compare to
  @return results