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Thread: unsafe operations note??

  1. #1
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    Default unsafe operations note??

    import java.util.*;
     
    public class iterates {
     
        private ArrayList<String> arrayOfString = new ArrayList();
        private String input = "hui hello { q...} qdf qkfh youu";
        private int n = 0;
     
        public static void main(String[] args) {
            iterates h = new iterates();
            h.studyString();
        }
     
        public void studyString() {
            String originalText = "Hello ther{e oops)eee";
            arrayOfString = toArray(originalText);
            Iterator bitch = arrayOfString.iterator();
     
            while (bitch.hasNext()) {
                if (bitch.next().equals('{') || bitch.next().equals('}')) {
                    int i = arrayOfString.indexOf(bitch.next());
                    arrayOfString.add(i + 1, "<br>");
                }
            }
     
        }
     
        public ArrayList<String> toArray(String input) {
            StringTokenizer pieces = new StringTokenizer(input);
     
     
            while (n <= pieces.countTokens()) {
                arrayOfString.add(n, pieces.nextToken());
            }
            n++;
     
            return arrayOfString;
        }
    }
    Upon compiling this, I get the note "iterates.java uses unchecked or unsafe operations"; "Recompile with -Xlint: unchecked for details". How can I resolve this?

    Note, I am trying to convert a random string (the code here has been slightly adjusted - this is in fact a stub of a class) to an arrayList<String>. If you have a better idea as to how I should do this, please let me know!

    Thanks!
    Last edited by helloworld922; March 20th, 2010 at 07:07 PM.


  2. #2
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    Default Re: unsafe operations note??

    SO SORRRYYYY FOR THE DEROGATORY VARIABLE NAMESSSSSSSSS! I THOUGHT I READJUSTED BEFORE COPY PASTING. IT'S ME EXPRESSING THE FRUSTRATION :p! SORRY ONCE AGAIN!

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    Administrator copeg's Avatar
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    Default Re: unsafe operations note??

    Check the use of Generics in your code, for example:

    private ArrayList<String> arrayOfString = new ArrayList[COLOR="SeaGreen"]<String>[/COLOR]();

    You can also use the split function of String

    String[] split = inputString.split("\t\n\r\f");
    Which splits on the default delim for StringTokenizer and returns an array

  4. #4
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    Default Re: unsafe operations note??

    Thanks once again copeg.

    If I apply your split method, it will "deform" the string so that when I come to convert the ArrayList back into a string, the white space will be missing (if I initially use that as a delimiter?)

    And what exactly is String[]...a form of array list no? so how exactly do I instantiate this in the beginning of the code?

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