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
– pb2q, Commented Oct 16, 2012 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
– Levon Tamrazov, Commented Oct 16, 2012 at 15:45

Bhesh Gurung · Accepted Answer · 2012-10-16 14:46:28Z

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, 2012 at 14:46

answered Oct 16, 2012 at 14:41

Bhesh Gurung

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3 Comments

Lo Juego Over a year ago

Maybe you have a variable named Arrays? Common! My answer was downvoter for less :)

Levon Tamrazov Over a year ago

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 Over a year ago

Also thank you for that workaround! I used it instead of having to rename the class. Worked like a charm!

Omaha · Accepted Answer · 2012-10-16 14:46:04Z

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, 2012 at 14:46

answered Oct 16, 2012 at 14:39

Omaha

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2 Comments

pb2q Over a year ago

or rather: he's got a variable named Arrays: Object Arrays = null

Levon Tamrazov Over a year ago

I called the class for this program Arrays. That must be it, so I'll just rename the class. Thank you!

Mik378 · Accepted Answer · 2012-10-16 14:53:58Z

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, 2012 at 14:53

answered Oct 16, 2012 at 14:42

Mik378

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Comments

Sashi Kant · Accepted Answer · 2012-10-16 14:38:25Z

-1

Why dont you try ::

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

answered Oct 16, 2012 at 14:38

Sashi Kant

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3 Comments

pb2q Over a year ago

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.

Sashi Kant Over a year ago

If you try this for arrays: it will print the comma separated data

Levon Tamrazov Over a year ago

Yeah I tried this as well before posting this question, it printed the memory address.

Lo Juego · Accepted Answer · 2012-10-16 14:47:50Z

-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, 2012 at 14:47

answered Oct 16, 2012 at 14:40

Lo Juego

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1 Comment

Edd Over a year ago

If the array hadn't been initialised, I wouldn't expect the argument exception.

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