deep copy list of maps

ListMapDeepCopy.java

import java.util.*;

public class ListMapDeepCopy {
    static <A, B> void deepCopy(List<Map<A,B>> target, List<Map<A,B>> source ) {
        target.clear();
        source.forEach(m -> target.add(new HashMap<>(m)));
    }

    public static void main(String[] args) {
        Map<String, Integer> foobar1 = new HashMap<>();
        foobar1.put("foo1", 1);
        foobar1.put("bar1", 2);
        Map<String, Integer> foobar2 = new HashMap<>();
        foobar2.put("foo2", 10);
        foobar2.put("bar2", 20);

        List<Map<String, Integer>> maps1 = new ArrayList<>();
        maps1.add(foobar1);
        maps1.add(foobar2);
        List<Map<String, Integer>> maps2 = new ArrayList<>();
        deepCopy(maps2, maps1);

        System.out.println("--- maps 1 ---");
        maps1.stream().forEach(System.out::println);
        System.out.println("--- maps 2 ---");
        maps2.stream().forEach(System.out::println);

        maps1.get(1).put("xyz2", 30);

        System.out.println("--- maps 1 ---");
        maps1.stream().forEach(System.out::println);
        System.out.println("--- maps 2 ---");
        maps2.stream().forEach(System.out::println);

        maps1.remove(1);
        System.out.println("--- maps 1 ---");
        maps1.stream().forEach(System.out::println);

        System.out.println("--- maps 2 ---");
        maps2.stream().forEach(System.out::println);

    }
}