java printing an array with Arrays.toString() error

Question

So I was trying to print an array of ints in my program, and following these instructions What's the simplest way to print a Java array?

wrote the following code:

    int[] totals = //method that returns int array
    System.out.println(Arrays.toString(totals));

But it wont compile saying that

"method toString in class Object cannot be applied to given types. required: no arguments found: int[] reason: actual and formal argument list differ in length"

Why does it do that? Do I not pass my array as an argument to toString? If not, how do I use toString?

Thank you!

looks fine to me. Test with an array like this: `int[] totals = { 1, 2, 3, 4 };` — pb2q, Oct 16 '12 at 14:38
No, I wasn't getting any other errors. But the two answers bellow helped me out. My main class was named Arrays (neubie mistake), so it was confused what I was referencing when I wrote Arrays.toString(totals). Thanks for the feedback! — Levon Tamrazov, Oct 16 '12 at 15:45

Bhesh Gurung · Accepted Answer · 2012-10-16T14:46:28.667

14

method toString in class Object cannot be applied to given types. required: no arguments found: int[] reason: actual and formal argument list differ in length

May be you have a variable named Arrays, that's why the compiler is complaining thinking that you are trying to invoke the Object.toString(), which doesn't take any argument.

Try

 System.out.println(java.util.Arrays.toString(totals));

edited Oct 16 '12 at 14:46

answered Oct 16 '12 at 14:41

Bhesh Gurung

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Maybe you have a variable named Arrays? Common! My answer was downvoter for less :) – Lo Juego Oct 16 '12 at 14:55
As I just commented above I called the class for this program Arrays, so that's probably it. Thank you for your feedback! – Levon Tamrazov Oct 16 '12 at 15:41
Also thank you for that workaround! I used it instead of having to rename the class. Worked like a charm! – Levon Tamrazov Oct 16 '12 at 15:42

Omaha · Answer 2 · 2012-10-16T14:46:04.397

2

The fact that it says "method toString in class Object cannot be applied to given types." makes me think you might not be importing the java.util.Arrays class properly, or you have some other object called Arrays.

edited Oct 16 '12 at 14:46

answered Oct 16 '12 at 14:39

Omaha

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or rather: he's got a _variable_ named `Arrays`: `Object Arrays = null` – pb2q Oct 16 '12 at 14:43
I called the class for this program Arrays. That must be it, so I'll just rename the class. Thank you! – Levon Tamrazov Oct 16 '12 at 15:38

Mik378 · Answer 3 · 2012-10-16T14:53:58.130

1

This works for me:

int[] totals = {1,2};
System.out.println(Arrays.toString(totals));

printing:

[1, 2]

Are you sure you use at least JDK 5 ?

Indeed, Arrays.toString(int[] a) only exists since JDK 5.

edited Oct 16 '12 at 14:53

answered Oct 16 '12 at 14:42

Mik378

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score -1 · Answer 4 · answered Oct 16 '12 at 14:38

-1

Why dont you try ::

int[] totals = //method that returns int array
    System.out.println(totals.toString());

answered Oct 16 '12 at 14:38

Sashi Kant

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`toString()` on an array won't do anything useful: it just prints the reference for the array. The OP wants to use the `Arrays` class to print each value. – pb2q Oct 16 '12 at 14:40
If you try this for arrays: it will print the comma separated data – Sashi Kant Oct 16 '12 at 14:45
Yeah I tried this as well before posting this question, it printed the memory address. – Levon Tamrazov Oct 16 '12 at 15:36

Lo Juego · Answer 5 · 2012-10-16T14:47:50.630

-1

Your method doesn't seem to init your array, try this:

int[] totals = new int[10]; //method that returns int array
System.out.println(Arrays.toString(totals));

edited Oct 16 '12 at 14:47

answered Oct 16 '12 at 14:40

Lo Juego

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If the array hadn't been initialised, I wouldn't expect the argument exception. – Edd Oct 16 '12 at 15:31

java printing an array with Arrays.toString() error

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