Question

How to convert an int into an array of ints in Java

Answer 1

public class Example {
    public static void main(String[] args) {
         
        int n = 78910;
        int[] arr = new int[5];
  
        for (int i = arr.length - 1; i >= 0; i--) {
            arr[i] = n % 10;
            n = n / 10;
        }
  
        for (int i = 0; i < arr.length; i++) 
            System.out.format("arr[%d] = %d\n", i, arr[i]);
    }
}



  
  
/*
run:
   
arr[0] = 7
arr[1] = 8
arr[2] = 9
arr[3] = 1
arr[4] = 0
   
*/

 

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Answer 2

public class Example {
    public static void main(String[] args) {
         
        int n = 78910;
        int len = (int)(Math.log10(n) + 1); // for n > 0
        int[] arr = new int[len];
  
        for (int i = arr.length - 1; i >= 0; i--) {
           arr[i] = n % 10;
           n = n / 10;
        }
  
        for (int i = 0; i < arr.length; i++) 
            System.out.format("arr[%d] = %d\n", i, arr[i]);
    }
}
  
  
  
  
/*
run:
   
arr[0] = 7
arr[1] = 8
arr[2] = 9
arr[3] = 1
arr[4] = 0
   
*/

 

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