Java中的多维数组（或其他结构）

Question

I come from PHP, i'm developping a tool, and i need to use a multidimensional array ( or something other, map,..) My goal is to be able to have an ArrayList like that :

[["name1", "surname1", "age"], ["name1", "surname1", "age"]]
Or :
[["name" : "name1", "surname" : "surname1", "age" : "age1"], ["name" : "name2", "surname" : "surname2", "age" : "age2"]]

And to be able to add another list into this global list, without size limit. Actually, i do not found that in Java, it's crazy xD.

The goal after that it to filter (with something like in PHP ((multi sort) to be able to sort those arrays which areinside the global array.

( I need to sort a key of those list,in order to get the most recent, and then i save the first list which is the most recent ).

So actually, i only arrive to get an arraylist.. but not multidimensionnal..

Thanks for tips :) (I use spring boot )

EDIT 1 :

HashMap<String, String> myhash = new HashMap<String, String>();
        myhash.put("Cat1", "james");
        myhash.put("Cat2", "adams");
        myhash.put("Cat3", "turk");
        System.out.println(myhash);
        // {Cat3=turk, Cat2=adams, Cat1=james}
        // I Would like : [{Cat3=turk, Cat2=adams, Cat1=james}, {Cat3=turkother, Cat2=adamsother, Cat1=jamesother}, {Cat3=fred, Cat2=ded, Cat1=tp}]

Answer 1

You mean HashMap<String, ArrayList<String>> and than use filter on the HashMap.keyset() .

But don't know if this is exactly what your are looking for.

Two notes:

1. This is basic Java. No Spring required.
2. If you make a nice Java object with the properties you are looking for, perhaps filtering will be more easier... But don't know. I would create an object Person with the required properties, store it in an ArraysList and than use this object further.

Update:

    HashMap<String, String> myhash = new HashMap<String, String>();
    myhash.put("Cat1", "james");
    myhash.put("Cat2", "adams");
    myhash.put("Cat3", "turk");
    System.out.println(myhash);
    // {Cat3=turk, Cat2=adams, Cat1=james}
    // I Would like : [{Cat3=turk, Cat2=adams, Cat1=james}, {Cat3=turk, Cat2=adams, Cat1=james}]

    ArrayList<HashMap<String, String>> lst = new ArrayList<>();
    lst.add(myhash);
    lst.add(myhash);
    System.out.println(lst); //[{Cat3=turk, Cat2=adams, Cat1=james}, {Cat3=turk, Cat2=adams, Cat1=james}]

Remark:

1. take care that myhash is added twice ==> if you change on the one field ==> changes on the other field is done as well
2. I don't see much value in this sample. Especially since the Map is added twice.
3. Take a look at the different samples for streams - for filtering and sorting. This might be useful.
4. If there are more qs I would guess its better to create a different q. I think that's it ... Feel free to ask ...

Answer 2

以下是在 Java 中获得列表列表的方式。

ArrayList<ArrayList<String>> myList = new ArrayList<>();