Thread: Help with Arrays!

Hey guys! I'm fairly new to java. For my course at uni I've got to design a caeser box that will encrypt a word and decrypt it. I pretty certain I've got the logic behind it so I won't need someone to give me the full code haha that would be cheating anyway. I like a challenge. Anyway.
I've started my code by reading the string, I've eliminated white spaces and its all lower case. After that I put the string in a char array with a total length of the string without whitespaces. after this I declared a grid with dimensions of x*x where x is the closest root of the length of the string without whitespaces.
So upto now its all good but this is where the problem starts ...
I've done 2 for loops to create the grid and then I'm increasing the rows and columns by 1 (ofc) and the values of each grid is equal to the elements of my char array that contains the string.
this might seem messy but I'll paste the problematic code part:

for(int row = 0; row<plainTextGrid.length; row++){
    		for(int column = 0; column <plainTextGrid.length; column++){
    			plainTextGrid[row][column]= plainTextArray[0];// this is where I want to set each element to a position on the grid. plainTextGrid is the grid, and plainTextArray is the array
 
 
    			System.out.print(plainTextGrid[row][column] + " ");
    			}
 
    			System.out.println();
    		}

My question is how can I increase each element of the char array by 1.

Originally Posted by Norm

You can do normal math with char values: 'a' + 1 = 'b'

I don't actually get what you are trying to say. My char array is in the two for loops, I want to increment the value of it until it reaches the last char in the array. so for example I could do this:

plainTextGrid[row][column]= plainTextArray[0];
plainTextArray[0]=plainTextArray[1];
plainTextArray[1]=plainTextArray[2];
//etc...

yeah so basically thats untidy and not useful for my situation

--- Update ---

Man Norm you are the best I can't believe how easy of a fix that was!!! cheers!

So what I did was add an int above the for loops

int a = 32;
    	for(int row = 0; row<plainTextGrid.length; row++){
    		for(int column = 0; column <plainTextGrid.length; column++){
 
    			plainTextGrid[row][column]= plainTextArray[32-a];
    			a--;
 
 
    			System.out.print(plainTextGrid[row][column] + " ");
    			}
 
    			System.out.println();
    		}

and output :
a l o n g t
i m e a g o
, i n a g a
l a x y f a
r , f a r a
w a y Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 33
at CaesarBox.encrypt(CaesarBox.java:30)
at CaesarBox.main(CaesarBox.java:8)