CODEWITHSUNDEEP
javastringnetbeanssplitjava.util.scanner
Name's Mac
Name's Mac

Reputation: 3

Use a Scanner to return a String

So, brand new to this site, but looks promising..

Anyways, to business, I'm working on this bit of code and I'm trying to return a string using a scanner. I've also tried using a BufferedReader, but it still returns null.

public String scanFile(String lineStarter) throws IOException {
    Scanner sc = new Scanner(file);

    while (sc.hasNextLine()) {
        String[] lineInfo = sc.nextLine().toString().split("//|");
        if(lineStarter.equalsIgnoreCase(lineInfo[0])){
            return sc.toString();
        }
    }

    //this is what keeps on returning
    return null;
}

The text file is formated like this:

starwars|cool|Actor|general|google|low
starw|cool|Actor|general|google|low
hark|dude|this|I|don't|know

So ya, it keeps on returning the last line that I don't want to return...

I guess, if you really want it, I call the method while opening a new file I guess

private void doubleClicked(java.awt.event.MouseEvent evt) {                               
    if(evt.getClickCount()==2){

        try {
            String s = (String) jList1.getSelectedValue();
            System.out.println(s);
            new DisplayMovie(scanFile(s)).setVisible(true);
        } catch (IOException ex) {
            System.out.println("An Error has occured");
        }
    }
}

I hope I explained it well enouph, any suggestions will hopefully help

Upvotes: 0

Views: 1458

Answers (1)

Paul Samsotha
Paul Samsotha

Reputation: 208984

Your split is incorrect.

.split("//|");

The forward slash is not an escape. You need backslash

.split("\\|");

With the first code, it will not split correctly, therefore you will get no matches and your method will always return null unless you pass the entire line as a string to the method

Upvotes: 1

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