Problems with empty arrays (Putting

Hi

I've been trying to find a way to put the first character of a string to the end of the string. What I'm doing is the following:

• Create an char array with the single letters in each slot.
• Taking the first character and putting it into the last array number + 1.
• making the first array[0] = null; (and this is where the problem lies)

When I make the array[0] = null and System.out.print(array); it gives me an error because its empty. I also tried doing array[0] = " "; and still gives me the same error.

I don't have the script with me its at school but thats how I'm doing it sorry I can't get the error message.

Is there a way to destrow the first array[0]? so I don't need it, or possibly make a loop that shifts everything over -1? But that seems long a redundant.

Any help is greatly appreciated!

Arrays do not support shifting.
Try using a loop, setting index i to i+1. Stop when i+1 is the last element. Then you can set the last element to the save char from the beginning.

"Taking the first character and putting it into the last array number + 1."

This will cause an IndexOutofBounds exception because as you are saying you are inserting it into the last array index + 1.

Unless there is a reason you are not using the substring String function I would take a look at that.

String (Java 2 Platform SE v1.4.2), int)

I think the pseudo code for what you are trying to accomplish with the method you are attempting above would be something like this

Code:

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String to char array
Store index 0 (first char) to temp variable

Loop char array from index 1 to last index
  retrieve current index of char array and insert into (current index - 1)
End Loop

insert temp variable (first char) to last index of char array

convert char array to String -- Return or Print String

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Use a container that allows the removing and adding of elements. See Vector or ArrayList
Arrays require moving ALL of the elements.

I'd just use substring. It would make it much easier.

I just read this:

Quote:

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making the first array[0] = null; (and this is where the problem lies)

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null is used for reference types (objects), you cannot use it for/with primitives.