Java Collection removeAll() Method with Examples

// Java Program to demonstrate
// Collection removeAll() method
import java.io.*;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

// Driver Class
class Main {
    // main function
    public static void main(String[] args)
    {
        Collection<Integer> list1 = new ArrayList<>();
        list1.add(1);
        list1.add(2);
        list1.add(3);
        list1.add(4);

        System.out.println("Original List: " + list1);

        // ArrayList
        Collection<Integer> list2 = new ArrayList<>();
        list2.add(2);
        list2.add(4);

        System.out.println(
            "List containing elements to be removed from the calling collection(list1): "
            + list2);

        boolean isRemoved = list1.removeAll(list2);

        System.out.println("Elements removed from List1: "
                           + isRemoved);
        System.out.println("Modified list1 after deletion: "
                           + list1);
    }
}

import java.io.*;
import java.util.ArrayList;
import java.util.List;

// Driver Class
class GFG {
      // main function
    public static void main(String[] args)
    {
        
        // Initiating list1
        List<Integer> list1 = new ArrayList<Integer>();
        list1.add(1);
        list1.add(2);
        list1.add(3);
        list1.add(4);

        System.out.println("Original List: " + list1);

          // Initiating list2
        List<Integer> list2 = new ArrayList<Integer>();
        list2.add(7);
        list2.add(8);

        System.out.println(
            "List containing elements to be removed from the calling collection(list1): "
            + list2);

          // Using removeAll() method
        boolean isRemoved = list1.removeAll(list2);

        System.out.println("Elements removed from List1: "
                           + isRemoved);
        System.out.println("Modified list1 after deletion: "
                           + list1);
    }
}