Example
Clear 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);
}
}
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Definition and Usage
The removeAll() method deletes all items from a list that are present in a specified collection.
Syntax
public boolean removeAll(Collection items)
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Parameter Values
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Parameter
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Description
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item
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Necessary: A collection containing items to remove from the list.
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Technical Details
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Returns:
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True if the list has been modified; false otherwise.
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Throws:
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NullPointerException occurs if the collection is null.
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More Examples
Example
Eliminate 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);
}
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