Can please fix this code there's no output

Question

import java.io.*;
class GFG{
static void swap(int[] arr, int i, int j)

{
    int temp = arr[i];

    arr[i] = arr[j];

    arr[j] = temp;

}
 int i = (low - 1);

   for(int j = low; j <= high - 1; j++)

    {

          if (arr[j] < pivot)

        {

            i++;

            swap(arr, i, j);

        }

    }

    swap(arr, i + 1, high);

    return (i + 1);

}

static void quickSort(int[] arr, int low, int high)

{

    if (low < high)

    {

        int pi = partition(arr, low, high);

  quickSort(arr, low, pi - 1);

        quickSort(arr, pi + 1, high);

    }

}

static void printArray(int[] arr, int size)

{

    for(int i = 0; i < size; i++)

        System.out.print(arr[i] + " ");

           System.out.println();
}

public static void main(String[] args)

{
    int[] arr = { 12, 10, 8, 9, 1, 4 };

    int n = arr.length;

    quickSort(arr, 0, n - 1);

    System.out.println("Sorted array: ");

    printArray(arr, n);

}

}

Answer 1

Make class GFG public

public class GFG{
//..

But you still same errors..
If you have system, then open this in SL playground in web version. You can clearly see errors in red color. Remove all those.
Or rewrite same text only code , with out spaces...

partition method is missing here..
may it missing method header, after swap method

edit:
Mirasol Sontousidad
error free swap method, sample :

import java.io.*;
class GFG{
static void swap(int[] arr, int i, int j)
{
int emp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
public static int partition (int arr[], int low, int high) {
//..
//..

Answer 2

Thank you