Array NullPointerException?

Question

Ok. I don't get why my code is reporting a NullPointerException, but I've been here for quite a while trying to figure it out.

And no, files is not null.

Edit: That was a mistake on my part, it was null (I didn't see the order I was running the functions.

Here is my code:

public String[] files;

private void updateRefs(String filepath) {
    try { 
        scr++;
        files[scr] = filepath; //NullPointerException???
    } catch ( Exception e ) {
        e.printStackTrace();
    }
}

Well, if you never actually create the array for `files` that would be one possible cause. — Hot Licks, Sep 20 '14 at 02:29
What is src? And you aren't initializing `files` to anything. — mkobit, Sep 20 '14 at 02:29
Oh src is the scroll variable so that I can tell where to insert a new item — Aaron Esau, Sep 20 '14 at 02:31
I guess I could just do files[files.length + 1] = filepath; ... ;) — Aaron Esau, Sep 20 '14 at 02:34

score 5 · Accepted Answer · answered Sep 20 '14 at 02:28

5

You have to new it, otherwise it is null:

String[] files = new String[10]; //or whatever size you need

answered Sep 20 '14 at 02:28

Peter Pei Guo

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Array NullPointerException?

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