DList dlist = new DList();
dlist.add( "bat" );
dlist.add( "cat" );
dlist.add( "dog" );
System.out.println( "dlist = " + dlist );
System.out.println();
dlist.insert( dlist.begin(), "ape" );
System.out.println( "After insert at begin = " + dlist );
dlist.insert( dlist.end(), "emu" );
System.out.println( "After insert at end = " + dlist );
DListIterator i = dlist.begin();
i.advance( 3 );
dlist.insert( i, 2, "fox" );
System.out.println( "After dlist.insert( i, 2, fox ) = " + dlist );
