Is it possible to make a dict python analog in Java?

Question

Java

Do I understand correctly that in Java without installing third-party libraries it is impossible to create an object of the form

{
    "key1": {
        "key2": "value2"
    },
    "key3": "value3"
}

because the value of the key can be either a string or a Map, or can generics be used somehow here?

Answer 1

Map<String, Object>