Java ArrayList removeAll() Method Example

Java ArrayList Examples

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• How to Create an ArrayList and Add Elements to It
• Create ArrayList from Another ArrayList in Java
• How to Access Elements of ArrayList in Java
• How to Remove Element from ArrayList in Java
• How to Iterate over ArrayList in Java
• Java ArrayList remove() Method Example
• Java ArrayList removeAll() Method Example
• Clear ArrayList in Java Example
• 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

Array 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 removeAll() Method removes from this list all of its elements that are contained in the specified collection (optional operation).

In this example, we use the removeAll() method to remove scripting Languages from programming Languages:

Java ArrayList removeAll() Method Example

package com.javaguides.collections.arraylistexamples;

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

public class RemoveElementsFromArrayListExample {
    public static void main(String[] args) {
        List < String > programmingLanguages = new ArrayList < > ();
        programmingLanguages.add("C");
        programmingLanguages.add("C++");
        programmingLanguages.add("Java");
        programmingLanguages.add("Kotlin");
        programmingLanguages.add("Python");
        programmingLanguages.add("Perl");
        programmingLanguages.add("Ruby");

        System.out.println("Initial List: " + programmingLanguages);

        // Remove all the elements that exist in a given collection
        List < String > scriptingLanguages = new ArrayList < > ();
        scriptingLanguages.add("Python");
        scriptingLanguages.add("Ruby");
        scriptingLanguages.add("Perl");

        programmingLanguages.removeAll(scriptingLanguages);
        System.out.println("After removeAll(scriptingLanguages): " + programmingLanguages);

        System.out.println("After Removing all elements that start with \"C\": " + programmingLanguages);
    }
}

Output

Initial List: [C, C++, Java, Kotlin, Python, Perl, Ruby]
After removeAll(scriptingLanguages): [C, C++, Java, Kotlin]
After Removing all elements that start with "C": [C, C++, Java, Kotlin]

Reference

https://www.javaguides.net/2018/06/guide-to-arraylist-class.html