Which of these is a method to clear all the data from ArrayList?
There are two ways to remove all elements of an ArrayList in Java, either by using clear() or by using the removeAll() method.
What is the simplest way to completely empty the ArrayList list?
The clear() method of ArrayList in Java is used to remove all the elements from a list. The list will be empty after this call returns.
Which method is used in ArrayList to remove all the elements?
The removeAll() method of java. util. ArrayList class is used to remove from this list all of its elements that are contained in the specified collection.
What is removeAll in Java?
The removeAll() method of Java ArrayList class removes all the elements from a list that are contained in the specified collection.
How do you delete data from an ArrayList in Java?
There are 3 ways to remove an element from ArrayList as listed which later on will be revealed as follows:
- Using remove() method by indexes(default)
- Using remove() method by values.
- Using remove() method over iterators.
How do you remove something from an ArrayList?
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).
How do I remove all instances of char in Java?
ArrayList removeAll() – remove all occurrences from list. ArrayList removeAll() removes all of matching elements that are contained in the specified method argument collection. It removes all occurrences of matching elements, not only first occurrence.
What built in list method would you use to remove an item from a list?
Summary:
| Method | Description |
|---|---|
| remove() | It helps to remove the very first given element matching from the list. |
| pop() | The pop() method removes an element from the list based on the index given. |
| clear() | The clear() method will remove all the elements present in the list. |
How can we delete a list?
Delete a list
- Open the Google Tasks app .
- Tap Menu .
- Choose the list you want to delete.
- Tap More .
- Tap Delete list.