CODEWITHSUNDEEP
javaarraysbufferedreaderindexoutofboundsexception
osm
osm

Reputation: 622

ArrayIndexOutOfBounds When Splitting String

I am trying to extract information from a file that is formatted as follows:

1
[email protected]|password|false

However, I seem to be getting ArrayIndexOutOfBounds errors when running the following code and I am unable to determine the reason for this as I believe that my splitting should be functioning correctly. The error is obtained on the line beginning with "users".

        sc = new Scanner (System.in);
        BufferedReader in = new BufferedReader (new FileReader (USAVE));
        int repeats = Integer.parseInt(in.readLine());
        for (int c = 0; c < repeats; c++){
            String info = in.readLine();
            System.out.println (info);
            String[] extracted = info.split("\\|");
            users.addUser(extracted[0], decryptPassword(extracted[1]));
        }
        in.close();

What could be the problem?

EDIT: I have changed "|" to "\|" but the problem persists.

EDIT2: StackTrace

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
at OnlineCommunications.userFromFile(OnlineCommunications.java:165)
at OnlineCommunications.logIn(OnlineCommunications.java:36)
at OnlineCommunications.emailOption(OnlineCommunications.java:593)
at OnlineCommunications.main(OnlineCommunications.java:683)

The method I have posted above is the one named userFromFile.

Upvotes: 1

Views: 169

Answers (4)

CincinnatiKid
CincinnatiKid

Reputation: 36

Actually there is nothing wrong with how you are parsing the string. The error lies elsewhere. I would add System.out.println (repeats) just before you enter the loop to make sure you are iterating the correct number of times. To debug even further, I would print the contents of extracted (Arrays.toString(extracted)) before the line invoking user.addUsers. If all that looks good, then the problem lies in the user.addUsers invocation.

Upvotes: 0

Ahmet Karakaya
Ahmet Karakaya

Reputation: 10139

similar post. Tokenizing Error: java.util.regex.PatternSyntaxException, dangling metacharacter '*' You have to use like this :

String[] extracted = info.split("\\|");

Upvotes: 1

Eng.Fouad
Eng.Fouad

Reputation: 117579

String.split(String regex) takes a regular expression as an argument, use:

String[] extracted = info.split("\\|");

Upvotes: 2

PermGenError
PermGenError

Reputation: 46398

String#split(regex) expects regex as a parameter and | is a meta character(special character) in regex world. In order to treat a meta charcter as a normal character you should escape it with backslash(\|)

String[] extracted = info.split("\\|");

or just include it inside a charcter class

String[] extracted = info.split("[|]");

Below are the meta characters in regex:

<([{\^-=$!|]})?*+.>

Upvotes: 6

Related Questions