Java ArrayList removeAll() 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
The removeAll() method removes all items from a list which belong to a specified collection.
Syntax
public boolean removeAll(Collection items)Parameter Values
| Parameter | Description |
|---|---|
| items | Required. A collection containing items to be removed from the list. |
Technical Details
| Returns: | true if the list changed and false otherwise. |
|---|---|
| Throws: |
NullPointerException - If the collection is null.
|
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
