如何将String对象保存到ArrayList中，同时删除这个ArrayList<HashMap<String中的HashMap，String>>？

ArrayList<HashMap<String, HashMap<String, String>>> arrayList = new ArrayList<>();

HashMap<String, String> stringHashMap = new HashMap<>();

String str = "要保存的String对象";
stringHashMap.put("key", str);

HashMap<String, HashMap<String, String>> hashMapHashMap = new HashMap<>();
hashMapHashMap.put("key", stringHashMap);
arrayList.add(hashMapHashMap);

arrayList.remove(hashMapHashMap);

import java.util.ArrayList;
import java.util.HashMap;

public class Main {
    public static void main(String[] args) {
        ArrayList<HashMap<String, HashMap<String, String>>> arrayList = new ArrayList<>();

        HashMap<String, String> stringHashMap = new HashMap<>();
        String str = "要保存的String对象";
        stringHashMap.put("key", str);

        HashMap<String, HashMap<String, String>> hashMapHashMap = new HashMap<>();
        hashMapHashMap.put("key", stringHashMap);
        arrayList.add(hashMapHashMap);

        arrayList.remove(hashMapHashMap);
    }
}