Array stored in a linked list. (Java)

Question

Is it possible to store a whole array as a node in a linked list. I am using the Linked List collection java provides and I keep getting an error for the following code.

List<Object[]> params = new LinkedList<Object[]>(); 
params.add(new Object[] { "ahhsjhs", {"jsdjdsk","djksdjsdk"}, true});

Type mismatch: cannot convert from String[] to Object

Do you mean params.add(new Object[]{"ahhsjhs", new String[]{"jsdjdsk", "djksdjsdk"}, true}); but are you sure you want this structure of data, I would suggest to use classes to store this type of data! — Youcef LAIDANI
– Youcef LAIDANI, Commented Jun 5, 2020 at 20:36
No I would like this structure of data. And yes that is what i mean — CodingNinja
– CodingNinja, Commented Jun 5, 2020 at 20:38
The corrected code by @YCF_L just works, try this: public static void main(String[] args) { List<Object[]> params = new LinkedList<Object[]>(); params.add(new Object[] { "ahhsjhs", new String[]{"jsdjdsk","djksdjsdk"}, true}); System.out.println(params); } — Dmitry Pisklov
– Dmitry Pisklov, Commented Jun 5, 2020 at 20:54
You did not declared this: "{"jsdjdsk","djksdjsdk"}" right as you didn't specify what is this so the compiler can't understand what object to put there, i would assume you want this as: "new String[]{"jsdjdsk","djksdjsdk"}" — Yotam Levy
– Yotam Levy, Commented Jun 5, 2020 at 21:07

Puskin · Accepted Answer · 2020-06-05 20:58:38Z

1

You can use this and not get error

List<Object[]> params = new LinkedList<Object[]>(); 
params.add(new Object[]{"ahhsjhs", new String[]{"jsdjdsk", "djksdjsdk"}, true});

You can even do this and there is nothing wrong

List<Object[]> params = new LinkedList<Object[]>(); 
params.add(new Object[]{"ahhsjhs", new Object[]{new Object[] {"@@", new Object[] {"@@"},"@@"}, "@@"}, true});

But it is bad practice! You should approach to OOP.

answered Jun 5, 2020 at 20:58

Puskin

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stackguy · Accepted Answer · 2020-06-05 20:57:11Z

0

It is possible, and you're doing it (almost) correctly. Compiler get confused with the inline declaration, doing the declaration outside should get you past the error, something like the following:

        List<Object[]> params = new LinkedList<Object[]>();
        String[] a = new String[]{"jsdjdsk","djksdjsdk"};
        params.add(new Object[] { a });
        params.add(new Object[] { "ahhsjhs", true});
        System.out.println(params);
    }

This with java:8.

answered Jun 5, 2020 at 20:57

stackguy

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Pritam Banerjee · Accepted Answer · 2020-06-05 21:02:16Z

0

Just put this String[] objects:

List<Object[]> params = new LinkedList<Object[]>();
String[] objects = new String[] { "jsdjdsk", "djksdjsdk" };
params.add(new Object[] { "ahhsjhs", objects, true });

edited Jun 5, 2020 at 21:02

answered Jun 5, 2020 at 20:56

Pritam Banerjee

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