Deque deque = new Deque();
deque.add( "ape" );
deque.add( "bat" );
deque.add( "cat" );
deque.add( "bat" );
deque.add( "bat" );
deque.add( "cat" );
System.out.println( "deque = " + deque );
System.out.println( "deque.count( bat ) = " + deque.count( "bat" ) );
int index = deque.indexOf( "bat" );
System.out.println( "deque.indexOf( bat ) = " + index );
deque.remove( index );
System.out.println( "After deque.remove( " + index + " ) = " + deque );
deque.replace( 0, 2, "bat", "BAT" );
System.out.println( "After deque.replace( 0, 2, bat, BAT ) = " + deque );
System.out.println( "deque.remove( cat ) = " + deque.remove( "cat" ) );
System.out.println( "After deque.remove( cat ) = " + deque );
