Java: cannot find symbol (Array class)

Question

I've got a bit of an issue when I'm trying to add integers to my array in Java. The task is from CodeWars and it is to take an integer such as 12345 and return it as a reversed array of integers like {5, 4, 3, 2, 1}.

Now, my code compiles and runs on eclipse, even though the array doesn't get returned as it should but I think code wars has an edited toString class for that.

Anyways, here is my code:

package CodeWars;

import java.lang.reflect.Array;

public class Digitize 
{

    public static void main(String[] args) 
    {
        System.out.println(digitize(472837428));
    }

    public static int[] digitize(long n) 
      {
        String conv = Long.toString(n); 
        int[] result = new int[conv.length()];
        for(int i = 0, index = conv.length(); i == conv.length(); i++, index--)
        {
            int temp = Character.getNumericValue(conv.charAt(i));
            Array.setInt(result, index, temp);
        }
        return result;
      }
}

And since code wars for some reason doesn't want us to have main methods, here is what I pasted there:

import java.util.*;
public class Kata 

{
  public static int[] digitize(long n) 
  {
    String conv = Long.toString(n); 
        int[] result = new int[conv.length()];
        for(int i = 0, index = conv.length(); i == conv.length(); i++, index--)
        {
            int temp = Character.getNumericValue(conv.charAt(i));
            Array.setInt(result, index, temp);
        }
        return result;
  }
}

That code then runs on their checking method here:

import org.junit.Test;
import static org.junit.Assert.assertArrayEquals;

public class DigitizeExampleTests {
  @Test
  public void tests() {
    assertArrayEquals(new int[] {1, 3, 2, 5, 3}, Kata.digitize(35231));
  }
}

So when i run the code in CodeWars I get this thrown at me:

/workspace/java/src/Kata.java:12: error: cannot find symbol
            Array.setInt(result, index, temp);
            ^
  symbol:   variable Array
  location: class Kata
1 error

I've looked all over google but all other issues with can't find symbol have been misspelled classes or method calls. Any ideas? Also as a beginner Java learner, if you see any other ways to improve the code please do let me know.

Thanks

Your for loop condition is wrong (the condition is when to keep going, not when to stop), and your index is wrong. You'd get an ArrayIndexOutOfBoundsException on the first iteration of the loop, except the loop will never run due to the condition being wrong. Also, as other have said, just access the array directly without reflection. — David Conrad
– David Conrad, Commented Jul 16, 2018 at 17:41

John Kugelman · Accepted Answer · 2018-07-16 17:30:29Z

2

It doesn't know what Array is because import java.lang.reflect.Array is missing.

But actually you shouldn't be using reflection at all. According to Oracle:

Reflection is commonly used by programs which require the ability to examine or modify the runtime behavior of applications running in the Java virtual machine. This is a relatively advanced feature and should be used only by developers who have a strong grasp of the fundamentals of the language.

All you need is:

result[index] = temp;

answered Jul 16, 2018 at 17:30

John Kugelman

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