내가 밖에서 시로 봤는데 흠흐밍 흠흐밍 하면서 돌아다니더라

public class MergeSortString {
    static void merge(String[] arr, int left, int middle, int right) {
        // Find sizes of two subarrays to be merged
        int n1 = middle - left + 1;
        int n2 = right - middle;

        /* Create temp arrays */
        String[] L = new String[n1];
        String[] R = new String[n2];

        /*Copy data to temp arrays*/
        System.arraycopy(arr, left, L, 0, n1);
        System.arraycopy(arr, middle + 1, R, 0, n2);

        /* Merge the temp arrays */

        // Initial indexes of first and second subarrays
        int i = 0, j = 0;

        // Initial index of merged subarray array
        int k = left;
        while (i < n1 && j < n2) {
            if (L[i].compareTo(R[j]) <= 0) {
                arr[k] = L[i];
                i++;
            } else {
                arr[k] = R[j];
                j++;
            }
            k++;
        }

        /* Copy remaining elements of L[] if any */
        while (i < n1) {
            arr[k] = L[i];
            i++;
            k++;
        }

        /* Copy remaining elements of R[] if any */
        while (j < n2) {
            arr[k] = R[j];
            j++;
            k++;
        }
    }

    // Main function that sorts arr[l..r] using merge()
    static void sort(String[] arr, int left, int right) {
        if (left < right) {
            // Find the middle point
            int middle = left + (right - left) / 2;

            // Sort first and second halves
            sort(arr, left, middle);
            sort(arr, middle + 1, right);

            // Merge the sorted halves
            merge(arr, left, middle, right);
        }
    }

    /* A utility function to print array of size n */
    static void printArray(String[] arr) {
        for (String str : arr) {
            System.out.print(str + " ");
        }
        System.out.println();
    }

    // Driver method
    public static void main(String[] args) {
        String[] arr = {"panda", "cookie", "newjeans", "twice", "blackpink"};
        System.out.println("Given Array");
        printArray(arr);

        long startTime = System.nanoTime();
        sort(arr, 0, arr.length - 1);
        long endTime = System.nanoTime();

        System.out.println("\nSorted array");
        printArray(arr);

        System.out.println("\nTime taken: " + (endTime - startTime) + " nanoseconds");
    }
}