Switching int and string arrays in Java

I've been working on this assignment for some time and I'm stuck. The purpose is to make an int array with numbers 1-5, and then make a string array with 6-10, then put the 6-10 in the int array and the 1-5 in the string array, and afterwards do some stuff to it. I've done most of the "stuff" to it ( multiply, add etc ) but I can't figure out how to switch the two arrays with each other. I've tried a few methods that I found on stackoverflow but I couldn't implement them. Currently the methods I tried are commented out

Here's the code :

import java.util.*;
import java.io.*;

public class Rebel
{
   public static void main (String[] args) 
   {  
      int[] numbers = {1,2,3,4,5};
      String[] words = {"6", "7", "8", "9", "10"};

      System.out.println(numbers.getClass().getName()); // test data type before converting
      System.out.println(words.getClass().getName()); // test data type before converting

      for(int i = 0; i < numbers.length; i++) // prints out int array
      {
         System.out.println(numbers[i]);
      }

      for(int j = 0; j < words.length; j++) // prints out string array
      {
         System.out.println(words[j]);
      }
      /* Switching the arrays 


      //java.util.Arrays.toString(numbers[]); // converts int to string
      // numbers = Arrays.asList(words).stream().mapToInt(Integer::parseInt).toArray(); // convert string to int

     // int [] tempNum = Arrays.asList(words.split(",")).stream().map(String::trim).mapToInt(Integer::parseInt).toArray();

     //int [] tempNum = Arrays.asList(words.split(",")).stream().mapToInt(Integer::parseInt).toArray();
     */ 

      System.out.println("There are " + numbers.length + " elements in numbers array");
      System.out.println("There are " + words.length + " elements in words array");
      System.out.println(java.util.Arrays.toString(numbers));
      System.out.println(java.util.Arrays.toString(words));

      for(int num: numbers)
      {
         num = num*4;
         System.out.println(num);
      }
      for (String word: words)
      {
         System.out.println(stringMultiply(word, 3)); // s = word, and n = 3;
      }
      System.out.println(numbers.getClass().getName()); // test data type after converting
      System.out.println(words.getClass().getName()); // test data type after converting


   }


   public static String stringMultiply(String s, int n) /// "multiply" string
   {
    StringBuilder sb = new StringBuilder();
    for(int i = 0; i < n; i++)
    {
        sb.append(s);
    }
    return sb.toString();
   }
}