How do you remove from ArrayList while iterating?

How do you remove from ArrayList while iterating?

The right way to remove objects from ArrayList while iterating over it is by using the Iterator’s remove() method. When you use iterator’s remove() method, ConcurrentModfiicationException is not thrown.

How can we remove an Object from ArrayList remove () method using iterator remove () method and using iterator?

There are two ways to remove objects from ArrayList in Java, first, by using the remove() method, and second by using Iterator. ArrayList provides overloaded remove() method, one accepts the index of the object to be removed i.e. remove(int index), and the other accept objects to be removed, i.e. remove(Object obj).

What is the difference between remove () method of collection and remove () method of Iterator?

Iterator can only move to next() element or remove() an element. However Collection can add(), iterate, remove() or clear() the elements of the collection. Iterator provides a better speed than Collections, as the Iterator interface has limited number of operations. java.

How do you remove an element from an ArrayList in Java?

Remove an Element from ArrayList in Java

1. Using ArrayList.remove() Method. By index. By element.
2. Using Iterator.remove() Method.
3. Using ArrayList.removeIf() Method.

Why does iterator remove Do not throw ConcurrentModificationException?

ConcurrentModificationException is not thrown by Iterator. remove() because that is the permitted way to modify an collection while iterating. This is what the javadoc for Iterator says: Removes from the underlying collection the last element returned by this iterator (optional operation).

What is the difference between the remove () method of collection and remove () method of iterator?

How do you remove an element from an ArrayList?

However, there is more than one way of removing an element from the ArrayList that are as follows:

1. Using ArrayList.remove() Method. By index. By element.
2. Using Iterator.remove() Method.
3. Using ArrayList.removeIf() Method.

What is the difference between remove () method of collection and remove () method of iterator?

How do I reset my iterator?

Iterator has no reset method. To start again at the beginning, just get a new Iterator by calling iterator() again.

What is the difference between the remove () method of collection and iterator in Java?

As per Sun , “Iterator. remove is the only safe way to modify a collection during iteration; the behavior is unspecified if the underlying collection is modified in any other way while the iteration is in progress.”