Java ArrayList removeAll() Method Example

ArrayList Methods with Examples

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• Java ArrayList add() Method
• Java ArrayList addAll() Method
• Java ArrayList clear() Method
• Java ArrayList contains() Method
• Java ArrayList ensureCapacity() Method
• Java ArrayList clone() Method
• Java ArrayList get() Method
• Java ArrayList indexOf() Method
• Java ArrayList remove() Method
• Java ArrayList removeAll() Method
• Java ArrayList removeIf() Method
• Java ArrayList retainAll() Method
• Java ArrayList sort() Method
• Java ArrayList spliterator() Method

Java ArrayList Examples

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• Java 8 forEach() List Example
• Add Enum Values to ArrayList Example
• Join List Strings with Commas in Java
• Java Stream filter null values example
• Java ArrayList subList() Example
• Get Index of Elements in ArrayList Example
• Java ArrayList removeIf() Example
• Java ArrayList add(), get() and set() Method Example
• Iterate over ArrayList Using forEach Java
• Iterate over ArrayList using Iterator in Java
• Java ArrayList indexOf() and lastIndexOf() Example
• Search an Element in an ArrayList in Java
• Clear ArrayList in Java Example
• Java ArrayList removeAll() Method Example
• Java ArrayList remove() Method Example
• How to Iterate over ArrayList in Java
• How to Remove Element from ArrayList in Java
• How to Access Elements of ArrayList in Java
• Create ArrayList from Another ArrayList in Java
• How to Create an ArrayList and Add Elements to It

ArrayList removeAll() removes all of the matching elements that are contained in the specified method argument collection. It removes all occurrences of matching elements, not only the first occurrence.

Java ArrayList removeAll() Method Example

import java.util.ArrayList;
import java.util.List;

public class ArrayListDemo {

    public static void main(String[] args) {

        List < String > list = new ArrayList < > ();
        list.add("element 1");
        list.add("element 2");
        list.add("element 3");
        list.add("element 4");

        // Removes from this list all of its elements that are
        // contained in the specified collection (optional operation).
        List < String > list1 = new ArrayList < > ();
        list1.add("element 1");
        list1.add("element 2");
        System.out.println("removeAll operation example ---> " + list.removeAll(list1));

        list.forEach(key - > System.out.println(key));
    }
}

Output:

removeAll operation example ---> true
element 3
element 4

Reference

https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/ArrayList.html