MatrixRotation

package multidimensionalArrays;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;

public class stringMatrixRotation {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] input = scanner.nextLine().split("[()]");
        String firstCmd = input[0];
        char[][] matrix = new char[0][0];

        if (firstCmd.equalsIgnoreCase("rotate")) {
            matrix = readMatrix(scanner);
            int degrees = Integer.parseInt(input[1]);
            matrix = rotateMatrix(matrix, degrees);
        }

        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();
        }

    }

    private static char[][] rotateMatrix(char[][] matrix, int degrees) {
        int roatations = (degrees / 90) % 4;
        char[][] result = new char[0][0];

        if(roatations == 0){
            result = matrix;
        }else if(roatations == 1){
            int col = 0;
            result = new char[matrix[0].length][matrix.length];

            for (int r = matrix.length - 1; r >= 0 ; r--) {
                for (int c = 0; c < matrix[r].length ; c++) {
                    result[c][col] = matrix[r][c];
                }
                col++;
            }

        }else if(roatations == 2){
            result = new char[matrix.length][matrix[0].length];
            int row = 0;
            int col = 0;
            for (int r = matrix.length - 1; r >= 0 ; r--) {
                for (int c = matrix[r].length - 1; c >= 0 ; c--) {
                    result[row][col++] = matrix[r][c];
                }
                row++;
                col = 0;
            }

        }else if(roatations == 3){
            result = new char[matrix[0].length][matrix.length];
            int row = 0;
            int col = 0;

            for (int r = 0; r < matrix.length ; r++) {
                for (int c = matrix[r].length - 1; c >= 0 ; c--) {
                    result[row++][col] = matrix[r][c];
                }
                col++;
                row = 0;
            }

        }

        return result;
    }

    private static char[][] readMatrix(Scanner scanner) {
        String text = scanner.nextLine();
        List<String> words = new ArrayList<>();

        int bestLen = 0;
        while(!text.equalsIgnoreCase("end")){
            if(text.length() > bestLen){
                bestLen = text.length();
            }
            words.add(text);
            text = scanner.nextLine();
        }

        char[][] matrix = new char[words.size()][bestLen];
        for (int row = 0; row < words.size() ; row++) {
            for (int col = 0; col < bestLen ; col++) {
                if(col > words.get(row).length() - 1){
                    matrix[row][col] = ' ';
                }else{
                    matrix[row][col] = words.get(row).charAt(col);
                }
            }

        }

        return matrix;
    }
}