使用空格时的字符串索引超出范围异常

Question

I'm making a chatbot, and it needs to break down every sentence into an array list of strings. It gives me a string index out of bounds exception whenever I use a space. I honestly don't know what to do about this, I've looked all over the forums, please help.

char tempChar;
String tempLetter;
String tempString = "";

for (int i = 1; i <= input.length(); i++) {
    Scanner breakDownScan = new Scanner(input);
    tempChar = breakDownScan.next().charAt(i-1);

    if (tempChar != ' ' && tempChar != '.' && tempChar != '!' && tempChar != '?') {
        tempLetter = Character.toString(tempChar);
        tempString += tempLetter;
    }

    if (tempChar == ' ' || tempChar == '.' || tempChar == '!' || tempChar == '?') {
        System.out.println("test");
        words.add(tempString);
    }

    if (i == input.length()) {
        breakDownScan.close();
    }
}

Thank you in advanced for any and all help you can provide :D

Answer 1

Just use the split method. Example:

String[] words = input.split(insert your desired parser here);

I do believe you can do just the same with an Array List :) (for the parser, use a space(" "), or what ever your words are separated by)