Help with function "equals"

[matm]

Hello Java forum members!

Instead of be on this forum and read others post of solved problems I registered and want to ask a question about Java that I have big problems with.

I´m doing a java crypto program in Java to school and in the beginning in my code I declerad an string array with alphabet letters.


And now I wont the equals function to check the first letter in my word and "look" at the word in the "old" alphabet, when the program see it I´m taking the same position on the cryptho alphabet.
I hope you understand.

Test:
------------------------------------------------------------------
"Choose a cryptonumber between 0-29"!
Then a method changing position with the number the user wrote in the beginning.
Write your message in English..(the user write in the word)

Now I put a for-loop to check the first letter in the word with the word in alphabet, when it match(equals) then I save the word in the crypt Alphabet.
And continue with the second letter and so on. In the end I will have a crypt-word.
------------------------------------------------------
The problem I have is with the for-loop that compare....

I have put a lot of hours on this matter, checked charAt, toCharArray...String.....and so on. And really need help.

Thanks in advanced..

import java.io.*;
import java.util.Scanner;
import java.util.Arrays;


public class Caeser {
	
		public static void main(String[] args) throws IOException {
			
			String [] realArray = {"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","Å","Ä","Ö"}; 
			String [] newArray = new String[realArray.length];
			
			Scanner scan = new Scanner(System.in);
			FileReader fr = new	FileReader("vergene.txt");
			Scanner infile = new Scanner(fr);
			
			
			String numbers="", message="", CryptMessage="", crypt, newArr="", cryptNumber="";
			int counting = 0;
			
			do
			{
				numbers = infile.nextLine();
				System.out.print(numbers);
				System.out.println();
			}while(infile.hasNextLine());
			
		
			int n = 30;
			
		
			while(n > 29)
			{
				System.out.print("Choose a cryptonumber between 0-29");
				n = scan.nextInt();
			}
			
			int z = 0;
			
			for(int i=realArray.length-n; i < realArray.length;i++)
			{
				
				newArray[z] = realArray[i]; 
				//System.out.print(newArray[i]);
				z++;
								
			}
		
			
			z=n;
			
			for(int i=0; i <  realArray.length-n; i++)
			{
				newArray[z] = realArray[i];
				//System.out.print(newArray[i]);
				
				z++;

			}
			
		
			for(int i=0; i < newArray.length; i++)
			{
				System.out.print(newArray[i]);
			}
		
			System.out.println();
				
			
			do
			{	
				if(counting != 0)
				{
					System.out.println(message + " contains wrong letter or letters!");
				}
				
			System.out.println("Write your message in English");
				
			message = scan.next();
			message = message.toUpperCase();
			
			counting++;
			
			}while(message.contains("Å") || message.contains("Ä") || message.contains("Ö"));
			
			String [] CryptoAlph = new String[message.length()];
			String [] cryptMessage = new String[message.length()];
			
//THIS IS WHERE I HAVE THE PROBLEM. (Sorry for the upper case letters)
			for(int i=0; i < message.length();i++)
			{
				for(int j=0; j < realArray.length; j++)
					{
						if(message(i).equals(realArray[j]))
						{
							cryptMessage[i] = newArray[j];
							System.out.print(cryptMessage[i]);
						}
							
					}
			}
	}
//this loop ends here

[user0]

Correct me if I'm wrong but I believe you are trying to loop through each character in each word and compare it to each element in realArray. In this case, you need a way to access each character in message and compare it to each String element in realArray. The charAt() method can be invoked on message but it will return a character, which must be converted to a String to be compared to realArray:

for(int i=0; i < message.length();i++)
{
for(int j=0; j < realArray.length; j++)
{
if(Character.toString(message.charAt(i)).equals(re alArray[j]))
{
cryptMessage[i] = newArray[j];
System.out.print(cryptMessage[i]);
}

}
}

[matm]

:)
Thanks for your help, and it was like you say about the looping thing, but after a long time seeking on the internet, trying to understand what the fault is, I came to the answer with this code (its inside a for-loop):

if(String.valueOf(message.charAt(i)).equals(alphabet[j]))
		{
		     cryptMessage[i] = cryptArray[j]; //I renamed the variable
	         }

Really hard when I try to find the answer but when I see the answer in front of me it make sense. I think I need more Java-experience..

I will never forget now about String.valueOf(......). It may be good help for me later on my future of Java coding.