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Thread: Intparse error. I have been trying to fix for hours.

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    Default Intparse error. I have been trying to fix for hours.

    I am trying to create a method that when called will break an String consisting of an integer into individual digits, then converting these digits into integers and fill an array with these integers.

    I keep getting the error:
    java.lang.NumberFormatException: For input string: ""
    at java.lang.NumberFormatException.forInputString(Num berFormatException.java:65)
    at java.lang.Integer.parseInt(Integer.java:504)
    at java.lang.Integer.parseInt(Integer.java:527)
    at add.stringSplit(add.java:56)
    at add.main(add.java:27)"


    I feel really stupid and have been looking for solutions online, but I can't find anything relevant.
    Any help would seriously be appreciated. I wasted my whole Saturday on this.


        private int[] stringSplit (String fullString)
        {
            int[] tempArray = new int[fullString.length()];
            for(int i = 0; i < fullString.length(); i++)
            {
                String  x = fullString.substring(i,i);
                tempArray[(i)] = Integer.parseInt(x);
            }
            return tempArray;


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    Default Re: Intparse error. I have been trying to fix for hours.

    Read the documentation for the substring method. The end index is not included in the resultant substring.

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    Default Re: Intparse error. I have been trying to fix for hours.

    // Java doc
    public String substring(int beginIndex,
                   int endIndex)
     
    Returns a new string that is a substring of this string. The substring begins at the specified beginIndex and extends to the character at index endIndex - 1. Thus the length of the substring is endIndex-beginIndex.
     
    Examples:
     
         "hamburger".substring(4, 8) returns "urge"
         "smiles".substring(1, 5) returns "mile"
     
     
    Parameters:
        beginIndex - the beginning index, inclusive.
        endIndex - the ending index, exclusive.
    Returns:
        the specified substring.
    Throws:
        IndexOutOfBoundsException - if the beginIndex is negative, or endIndex is larger than the length of this String object, or beginIndex is larger than endIndex.

    You are telling it to return a substring of nothing.

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    Default Re: Intparse error. I have been trying to fix for hours.

    Ah, thank you very much. I knew it would be something simple in the end, which made it even more frustrating!

    Say you are wanting to return a substring of the final letter, would you still tell it to stop at a point after the word that doesn't exist?

    For example, would this work?
    "hamburger".substring(8, 9) returns "r"

    Really appreciate the help guys.

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    Super Moderator helloworld922's Avatar
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    Default Re: Intparse error. I have been trying to fix for hours.

    yes, that's correct (try it yourself and see).

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