Help!!! I need to hand homework tomorrow!!!

Question

Hi!!!
Im doing my first Java assignment and Im having lots of trouble. I finally got to compile it, but when I run it red text below (which I don't understand) appears in the bottom window!!!
Here is the program and the text that appears in the bottom... PLEASE HELP ME!!
* T?tulo: Detecci?n de palabras capic?as
/** La persona digita la palabra que desea evaluar. Luego se cuenta cuantas
* letras tiene la palabra, el resultado se guardar? en una variable "F".
* La variable "I" se inicializa en 1. Posteriormente mediante un while, se compara la
* letra que est? en la posici?n I con la que est? en posici?n F, si son iguales se
* contin?a. Al finalizar si todas las letras coinciden entonces se indica, o si no se
* hace lo mismo con el contrario.
import javax.swing.JOptionPane;
public class capic?a {
public static void main(String[] args) {
String palabra = JOptionPane.showInputDialog ("Introduzca la palabra que desea evaluar"); //esta es la hilera donde van las letras de la palabra
int letra; //variable entera donde se almacena lo introducido
//una vez transformado en hilera
int I = 0; //variable que servir? para llevar la cuenta y comparar
int F = palabra.length(); //n?mero de letras de la palabra introducida
while ( palabra.charAt(I)== palabra.charAt(F) && (F > I))
{   F = F - 1;
I = I + 1;
//num= Integer.parseInt(hnum));
if (F <= I) {
System.out.println("si es pal?ndroma");
}else{
System.out.println("no es pal?ndroma");
This is what appears in the box which is called Interactions
Welcome to DrJava. Working directory is -----------------------------
java capic?a StringIndexOutOfBoundsException: String index out of range: 5
at java.lang.String.charAt(Unknown Source)
at capic?a.main(capic?a.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
>
Message was edited by:
anatel

Answer 1

I havn't really followed what's going on, but if you are asking how to remove spaces from a string, call the split() method on the string. This returns an array of the parts of the string that arn't spaces.
e.g.
String test "this is a test string";
String[] words = test.split();
for (int i = 0; i < words.length; i++)
  System.out.println(words);
[i]untested
This should print:
this
is
a
test
string