FireTheArrows-MATRIX

import java.util.Scanner;

public class p03_FireTheArrows {

    public static void main(String[] args) {
        Scanner input = new Scanner (System.in);
        int n = Integer.parseInt(input.nextLine());
        char[][] matrix = new char[n][];
        boolean hasMoved;

        for (int i = 0; i < n; i++) {
            matrix[i] = input.nextLine().toCharArray();
        }

        do {
            hasMoved = false;
            for (int row = 0; row < matrix.length; row++) {
                for (int col = 0; col < matrix[row].length; col++) {
                    switch (matrix[row][col]) {
                    case '>':
                        if (col + 1 > matrix[row].length - 1){
                            break;
                        }
                        if (matrix[row][col + 1] == 'o'){
                            matrix[row][col + 1] = '>';
                            matrix[row][col] = 'o';
                            hasMoved = true;
                        }
                        break;
                    case '<':
                        if (col - 1 < 0){
                            break;
                        }
                        if (matrix[row][col - 1] == 'o'){
                            matrix[row][col - 1] = '<';
                            matrix[row][col] = 'o';
                            hasMoved = true;
                        }
                        break;
                    case '^':
                        if (row - 1 < 0){
                            break;
                        }
                        if (matrix[row - 1][col] == 'o'){
                            matrix[row - 1][col] = '^';
                            matrix[row][col] = 'o';
                            hasMoved = true;
                        }
                        break;
                    case 'v':
                        if (row + 1 > matrix.length - 1){
                            break;
                        }
                        if (matrix[row + 1][col] == 'o'){
                            matrix[row + 1][col] = 'v';
                            matrix[row][col] = 'o';
                            hasMoved = true;
                        }
                        break;
                    }
                }
            }

        } while (hasMoved == true);

        for (int i = 0; i < matrix.length; i++) {
            for (int j = 0; j < matrix[i].length; j++) {
                System.out.print(matrix[i][j]);
            }
            System.out.println();
        }
    }

}