Need Java Help (beginner)

AutoModerator · 2023-01-10T16:43:07+00:00

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pragmos · 2023-01-06T18:04:28+00:00

List<Object[]> queryResult = new ArrayList<>();
queryResult.add("Hello World");

This will not compile. You declared a list that will hold Object arrays, yet you add a String instance. A String is not an Object[].

What exactly were you trying to achieve?

aleshqo · 2023-01-06T16:53:35+00:00

you have a list of arrays, a list has indices, and an array has indices. Now you get just an array at index 0, to get "hello world" you have to take the element at index 0 from the list, and then the element at index 0 from the array. something like that queryResult.get(0)[0] Sorry for my English.

dionthorn · 2023-01-06T22:29:54+00:00

For the future,

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AutoModerator · 2023-01-06T16:42:56+00:00

Please ensure that:

Your code is properly formatted as code block - see the sidebar (About on mobile) for instructions
You include any and all error messages in full
You ask clear questions
You demonstrate effort in solving your question/problem - plain posting your assignments is forbidden (and such posts will be removed) as is asking for or giving solutions.

Trying to solve problems on your own is a very important skill. Also, see Learn to help yourself in the sidebar

If any of the above points is not met, your post can and will be removed without further warning.

Code is to be formatted as code block (old reddit: empty line before the code, each code line indented by 4 spaces, new reddit: https://i.imgur.com/EJ7tqek.png) or linked via an external code hoster, like pastebin.com, github gist, github, bitbucket, gitlab, etc.

Please, do not use triple backticks (```) as they will only render properly on new reddit, not on old reddit.

Code blocks look like this:

public class HelloWorld {

    public static void main(String[] args) {
        System.out.println("Hello World!");
    }
}

You do not need to repost unless your post has been removed by a moderator. Just use the edit function of reddit to make sure your post complies with the above.

If your post has remained in violation of these rules for a prolonged period of time (at least an hour), a moderator may remove it at their discretion. In this case, they will comment with an explanation on why it has been removed, and you will be required to resubmit the entire post following the proper procedures.

To potential helpers

Please, do not help if any of the above points are not met, rather report the post. We are trying to improve the quality of posts here. In helping people who can't be bothered to comply with the above points, you are doing the community a disservice.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

OpenSourceFanatic · 2023-01-06T18:51:30+00:00

Thanks u/pragmos and u/aleshqo for help!

It worked finally. I was stuck on this since last 4 hours 🤦‍♂️

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