Курсова Работа 2 - 5.5б Пунктуация

import java.util.Scanner;

public class Pet_Pet_B {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] array = sc.nextLine().toCharArray();
        punctuation(array);
    }

    public static void punctuation(char[] array) {
        for (int i = array.length - 1; i >= 0; --i) {
            if (Character.isLowerCase(array[i]))
                System.out.print(Character.toUpperCase(array[i]));
            else if (Character.isUpperCase(array[i]))
                System.out.print(Character.toLowerCase(array[i]));
            else if (Character.isDigit(array[i]))
                System.out.print(Character.getNumericValue(array[i]) * 2);
            else {
                switch (array[i]) {
                case ' ':
                case '!':
                case '#':
                case '%':
                case '&':
                case '(':
                case ')':
                case '*':
                case '-':
                case '.':
                case ':':
                case ',':
                case '?':
                case '@':
                case '[':
                case ']':
                case '_':
                case '{':
                case '}':
                    System.out.print(".");
                    break;
                }
            }
        }
    }
}