CODEWITHSUNDEEP
javaswingjava-iojfilechooser
Justas S
Justas S

Reputation: 594

Reading a file after pressing a button

I have tried to create a program that lets you to choose a file,reads it and then prints the results out... This is what i have so far

public class Main {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Bebras braces matcher");
        JButton selectf = new JButton("Open file");
        selectf.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String cmd = e.getActionCommand();
                if(cmd.equals("Open file")) {
                    JFileChooser chooser =new JFileChooser();
                    FileFilter filefilter = new FileNameExtensionFilter("","txt");
                    chooser.setFileFilter(filefilter);
                    int returnVal = chooser.showOpenDialog(chooser);
                    if(returnVal==JFileChooser.APPROVE_OPTION) {
                        FileName=chooser.getSelectedFile().getName();
                        System.out.println(FileName);       
                    }
                }
            }
        });
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(500,500);
        frame.add(selectf);
        frame.setVisible(true);

    }
    public static void countChar() throws FileNotFoundException {
        Scanner scan = null;
        try {
            scan = new Scanner(new File(FileName));
        }
        catch (FileNotFoundException e) {
        }
        while (scan.hasNext()) {
            String character = scan.next();
            int index =0;
            char close = '}';
            char open = '{';
            while(index<character.length()) {

                if(character.charAt(index)==close){
                    CloseCount++;
                }
                else if(character.charAt(index)==open) {
                    OpenCount++;
                }
                index++;
            }
        }
        System.out.println("Opened: "+OpenCount+"Closed: "+CloseCount);
    }
    private static String FileName;
    private static int CloseCount = 0;
    private static int OpenCount = 0;
    private static final long serialVersionUID = 7526472295622776147L;
}

And it runs okay,just doesn't do what it need to... How do I make "countChar" run? Because it doesn't print what i should..

I forgot to mention, if I call it after i print out the files name, I get this errro: "Unhandled exception type FileNotFoundException", I actually know really less about those things..

Upvotes: 0

Views: 1425

Answers (2)

Jignesh Gothadiya
Jignesh Gothadiya

Reputation: 160

you just assign file name in FileName instead of file path. so you use this

if(returnVal==JFileChooser.APPROVE_OPTION) {
FileName=chooser.getSelectedFile().getAbsolutePath();
countChar();

because if file is in same directory where you project is then work but when selected file reside in different places then need to use absolutepath of selected file.

Upvotes: 0

Etaoin
Etaoin

Reputation: 8734

You're almost there! You're just printing out the filename instead of calling that method.

See this?

if(returnVal==JFileChooser.APPROVE_OPTION) {
    FileName=chooser.getSelectedFile().getName();
    System.out.println(FileName);       
}

Instead of (or before or after, if you prefer) System.out.println(FileName);, just put countChar();.

Upvotes: 1

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