can you make a list of differents element in java without making a class for it

i need a create a list that contains in each iteration an int ,date and a note (String)

so what i need is something like this :
List A ={[5,12/12/2020, "note1"],[6,11/01/2021,"note2"],...}
what i need is the declaration for this . and i knew that i can change it to a list<list< String >> then change everything back from String to the type of thing that i want or declare a class that contains that information and make a list of that class but what i'm asking is there a way to make without doing that (without changing to String and without declaring a new class) .
thank you for any help you offer

Is that what you are looking for?

List<Object[]> lista = new ArrayList<Object[]>();

	lista.add(new Object[] {5, LocalDate.of(12,12,2020),  "note1"});
	lista.add(new Object[] {6, LocalDate.of(11,1,2021),  "note2"});

I don't think what you want is possible, at least not exactly the way you want it.

According to the the Java SE API, a List is "An ordered collection" and a Collection "represents a group of objects, known as its elements". See List
and/or Collection.

Each "element" of a List can only be a single object, so having an element that's actually "3" separate entities goes against its implementation.

But as you pointed out, that object element can contain whatever you want. But as you said, that's not a viable option in your case unfortunately.

I'm sure someone with more knowledge of Java can possibly suggest some method to achieve what you want, but I have a feeling at that point you'd be creating a hack to circumvent some of the core functionality of theList implementation, in which case using a List may not be the best route.

It sounds like you're describing a List where each element contains an int, a Date, and a String. So, creating a class that contains those 3 properties that can then be used as each object element of the List would be utilizing the List's implementation correctly as opposed to trying to make it do something it's not intended to do.

But I'm curious to see what others say and hope they can provide more help than I'm capable of providing! Good luck!

You can tell Collections to just store Objects, so you can stuff pretty much anything you want in there then pull it out later. This is Not Recommended(tm).

import java.util.*;

public class Rando
{
    public static void main(String args[])
    {
        List<Object> randomStuff = new ArrayList<>();

        randomStuff.add(1);
        randomStuff.add(new Date());
        randomStuff.add("A note");

        System.out.println(randomStuff);

        Map<String, Object> randomMap = new HashMap<>();

        randomMap.put("id", 1);
        randomMap.put("date", new Date());
        randomMap.put("note", "This is another note");

        System.out.println(randomMap);
    }
}