Java ArrayListremoveAll() Method
Example
Remove all items from a list:
import java.util.ArrayList;public class Main { public static void main(String[] args) { ArrayList<String> cars = new ArrayList<String>(); cars.add("Volvo"); cars.add("BMW"); cars.add("Ford"); cars.add("Mazda"); cars.add("Toyota"); cars.removeAll(cars); System.out.println(cars); }}Definition and Usage
TheremoveAll() method removes all items from a list which belong to a specified collection.
Syntax
public boolean removeAll(Collectionitems)Parameter Values
| Parameter | Description |
|---|---|
| items | Required. A collection containing items to be removed from the list. |
Technical Details
| Returns: | true if the list changed andfalse otherwise. |
|---|---|
| Throws: | NullPointerException - If the collection isnull. |
More Examples
Example
Remove multiple items from a list:
import java.util.ArrayList;public class Main { public static void main(String[] args) { ArrayList<String> cars = new ArrayList<String>(); cars.add("Volvo"); cars.add("BMW"); cars.add("Ford"); cars.add("Mazda"); cars.add("Toyota"); ArrayList<String> remove = new ArrayList<String>(); remove.add("Volvo"); remove.add("Ford"); remove.add("Mazda"); cars.removeAll(remove); System.out.println(cars); }}Related Pages
❮ ArrayList Methods
