UpsideDownText.java

package com.tinkeracademy.ap;

import java.util.Scanner;

public class Main {
	
	/**
	 * Array of all possible alphabet inputs
	 */
	public static char[] alphabets = new char[] { 'a', 			'b', 		'c', 		'd', 
												  'e', 			'f', 		'g', 		'h', 
												  'i',	 		'j', 		'k', 		'l', 
												  'm', 			'n', 		'o', 		'p', 
												  'q', 			'r', 		's', 		't',
			  									  'u', 			'v', 		'w', 		'x', 
			  									  'y', 			'z', 		
			  									  'A',			'B', 		'C',		'D',
			  									  'E',			'F',		'G', 		'H',
			  									  'I',			'J',		'K', 		'L',
			  									  'M',			'N',		'O',		'P',
			  									  'Q',			'R',		'S',		'T',
			  									  'U',			'V',		'W',		'X',
			  									  'Y',			'Z',
			  									  '0',			'1',		'2',		'3',		
			  									  '4',			'5',		'6',		'7', 		
			  									  '8',			'9',			
			  									  ',',			'.',		'?',		'!',
			  									  '"',			'\'',		'`',
			  									  '(',			')',		'[',		']',
			  									  '{',			'}', 		'<',		'>',
			  									  '&',			'_',		' ', 
			  									'\u0250',		'q', 		'\u0254', 	'p',
			                                    '\u01DD',		'\u025F', 	'\u0183', 	'\u0265', 
			                                    '\u1D09',		'\u027E',	'\u029E', 	'1',
			                                    '\u026F',		'u',		'o', 		'd',
			                                    'b',			'\u0279',	's',		'\u0287',
												'n',			'\u028C',	'\u028D',	'x',
												'\u028E', 		'z',	
												'\u2200',		'B', 		'\u0186',	'D',
												'\u018E',		'\u2132',	'\u05E4', 	'H',
												'I',			'\u017F',	'K', 		'\u02E5',
												'W',			'N',		'O',		'\u0500',
												'Q',			'R',		'S',		'\u2534',
												'\u2229',		'\u039B',	'M',		'X',
												'\u2144',		'Z',
												'0', 			'\u0196',		'\u1105',	'\u0190',  	
												'\u3123',		'\u03DB', 	 	'9',	'\u3125', 	
												'8',			'6', 		
												'\'',			'\u02D9',	'\u00BF', 	'\u00A1',
												'\u201E',		',',		',',
												')',			'(',		']',		'[',
												'}',			'{',		'>', 		'<',
												'\u214B',		'\u203E',	' '
			  									  };
	
	public static char[] reverseAlphabets = new char[] {
			                                    '\u0250',		'q', 		'\u0254', 	'p',
			                                    '\u01DD',		'\u025F', 	'\u0183', 	'\u0265', 
			                                    '\u1D09',		'\u027E',	'\u029E', 	'1',
			                                    '\u026F',		'u',		'o', 		'd',
			                                    'b',			'\u0279',	's',		'\u0287',
												'n',			'\u028C',	'\u028D',	'x',
												'\u028E', 		'z',	
												'\u2200',		'B', 		'\u0186',	'D',
												'\u018E',		'\u2132',	'\u05E4', 	'H',
												'I',			'\u017F',	'K', 		'\u02E5',
												'W',			'N',		'O',		'\u0500',
												'Q',			'R',		'S',		'\u2534',
												'\u2229',		'\u039B',	'M',		'X',
												'\u2144',		'Z',
												'0', 			'\u0196',		'\u1105',	'\u0190',  	
												'\u3123',		'\u03DB', 	 	'9',	'\u3125', 	
												'8',			'6', 		
												'\'',			'\u02D9',	'\u00BF', 	'\u00A1',
												'\u201E',		',',		',',
												')',			'(',		']',		'[',
												'}',			'{',		'>', 		'<',
												'\u214B',		'\u203E',	' ',
												'a', 			'b', 		'c', 		'd', 
												'e', 			'f', 		'g', 		'h', 
												'i',	 		'j', 		'k', 		'l', 
												'm', 			'n', 		'o', 		'p', 
												'q', 			'r', 		's', 		't',
			  									'u', 			'v', 		'w', 		'x', 
			  									'y', 			'z', 		
			  									'A',			'B', 		'C',		'D',
			  									'E',			'F',		'G', 		'H',
			  									'I',			'J',		'K', 		'L',
			  									'M',			'N',		'O',		'P',
			  									'Q',			'R',		'S',		'T',
			  									'U',			'V',		'W',		'X',
			  									'Y',			'Z',
			  									'0',			'1',		'2',		'3',		
			  									'4',			'5',		'6',		'7', 		
			  									'8',			'9',			
			  									',',			'.',		'?',		'!',
			  									'"',			'\'',		'`',
			  									'(',			')',		'[',		']',
			  									'{',			'}', 		'<',		'>',
			  									'&',			'_',		' '
												};

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		String input = s.nextLine();
		String output = "";
		for (int i = input.length() - 1; i >= 0; i--) {
			char in = input.charAt(i);
			int index = Main.findCharInAlphabetsArray(in);
			char out = reverseAlphabets[index];
			output = output + out;
		}
		System.out.println(output);
		s.close();
	}
	
	public static int findCharInAlphabetsArray(char in) {
		for (int i = 0; i < alphabets.length; i++) {
			if (alphabets[i] == in) {
				return i;
			}
		}
		System.out.println("cannot find char for " + in);
		return -1;
	}
	
	public static int findCharInReverseAlphabetsArray(char in) {
		for (int i = 0; i < reverseAlphabets.length; i++) {
			if (reverseAlphabets[i] == in) {
				return i;
			}
		}
		System.out.println("cannot find char for " + in);
		return -1;
	}

}