Question

How to check if HashSet contains ArrayList in Java

Answer 1

package javaapplication1;

import java.util.ArrayList;
import java.util.HashSet;

public class JavaApplication1 {

    public static void main(String[] args) {

        try {

            ArrayList<String> list = new ArrayList<>();
            list.add("java");
            list.add("c");
            list.add("c++");
            list.add("c#");

            HashSet<String> hash = new HashSet<>();
            hash.addAll(list);

            if (hash.containsAll(list)) {
                System.err.println("yes");
            } else {
                System.err.println("no");
            }

        } catch (Exception e) {
            System.out.print(e.toString());
        }
    }
}

/*
             
run:

yes
    
 */

 

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