Computer Science Canada

PLEASEEEEEEHELP MEEEEE ITS DUE TMR String index out of range: -1
Author:  worthless [ Tue Mar 31, 2015 3:51 pm ]
Post subject:  PLEASEEEEEEHELP MEEEEE ITS DUE TMR String index out of range: -1
Java:

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

/**
 * Rovarspraket
 *
 * @author
 * @version
 *
 */

public class Rovarspraket
{

        public static void main(String[] args) throws FileNotFoundException
        {
                Scanner inFile = new Scanner(new File("src/Rovarspraket.txt"));
                String line = inFile.nextLine().toLowerCase();
                String consonant =    "bcdfghjklmnpqrstvwxyz";
                String closestVowel = "aaeeeiiiiooooouuuuuuu";
                String newLine = "";
                for (int pos = 0; pos < line.length(); pos++)
                {
                        char letter = line.charAt(pos);
                        int consonantPos = consonant. indexOf(letter);
                        char vowel=closestVowel.charAt(consonantPos);
                        char nextConsonant = (char) (letter + 1);
                        String letterString = Character.toString(letter);
                        String vowelString = Character.toString(vowel);
                        String nextConsonantString = Character.toString(nextConsonant);
                        newLine = letterString + vowelString
                                        + nextConsonantString;
                       
                        if (consonantPos==-1)
                        {
                                String unchangeVowelString = Character.toString(letter);
                                newLine+=unchangeVowelString;
                        }
       
                }
                inFile.close();

        }
}




AND I GOT THIS
code:

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -1
        at java.lang.String.charAt(Unknown Source)
        at Rovarspraket.main(Rovarspraket.java:27)


Mod Edit: Please syntax="java" or code BBcode tags to wrap your code and stuff.
Author:  Zren [ Tue Mar 31, 2015 5:00 pm ]
Post subject:  RE:PLEASEEEEEEHELP MEEEEE ITS DUE TMR String index out of range: -1
String.indexOf() will return -1 if it can't find the string you supply it.
http://docs.oracle.com/javase/6/docs/api/java/lang/String.html#indexOf(java.lang.String)

Try debugging what character you're trying to find. Use System.out.println() to print the values of your variables.

Example:

Java:

System.out.format("pos=%s\n", pos);
char letter = line.charAt(pos);
System.out.format("letter=%s\n", letter);
int consonantPos = consonant. indexOf(letter);
System.out.format("consonantPos=%s\n", consonantPos);
char vowel=closestVowel.charAt(consonantPos);
System.out.format("vowel=%s\n", vowel);


I'm guessing you forgot about the newline character (\n) or the whitespace character.
http://www.asciitable.com/index/asciifull.gif

:


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