collection featuress
Arrays - converting to collections
collections EMPTY
collections reversing order
collections searching
collection singletons
collections sorting
collections synchronized
collections unmodifiable
Collection interface
      .add(Obj) collection method
      .addAll(Coll) collection method
      .clear( ) collection method
      .contains(Obj) collection method
      .containsAll(Coll) collection method
      .isEmpty( ) collection method
      .remove(Obj) collection method
      .removeAll(Coll) collection method
      .retainAll(Obj) collection method
      .size( ) collection method
      .toArray( ) collection method
      .toArray( Obj[ ] ) collection method
Collections class
      binarySearch(List, lookforObj ) collection method
      max(Coll) collection method
      min(Coll) collection method
      shuffle(List) collection method
      copy(List, List) collection method
      fill(List, Obj) collection method
      ncopies( ) collection method
Enumeration interface
      .elements( ) enumeration method
      .hasMoreElements( ) enumeration method
      .nextElement( ) enumeration method
Iterator interface
      .hasNext( ) iteration method
      .next( ) iteration method
      .remove( ) iteration method
      .add(Obj ) iteration method
      .hasPrevious( ) iteration method
      .nextIndex( ) iteration method
      .previous( ) iteration method
      .previousIndex( ) iteration method