As we know in Java each class that implements Collection interface should implement Iterator<E> iterator() method.
Stack and Queue are parts of collection hierarchy and implement this method as well. So we can write something like this:
Stack stack = new Stack();
// Deque stack = new ArrayDeque<>();
stack.add( "1" );
stack.add( "2" );
stack.add( "3" );
Iterator i = stack.iterator();
while ( i.hasNext() ) {
Object o = i.next();
if ( o.equals( "2" ) ) {
i.remove();
}
}
My concerns here are:
Is it ok that we are able to delete elements from the middle of the stack/queue?
Is it ok that stack/queue should "show" only one element (last in stack and first in queue) but actually we are able to get all of them without calling "pop","enqueue" methods?
