Question

I am currently trying to get my program to input data from a user-defined CSV file into a JTable. However, for some reason it doesn’t work properly, and Netbeans throws some exceptions into the debugger whenever I try to load or save the file.

private void openActionPerformed(java.awt.event.ActionEvent evt)
{                                     
    int returnVal = fileChooser.showOpenDialog(this);
    if (returnVal == JFileChooser.APPROVE_OPTION) {
        File file = fileChooser.getSelectedFile();
        try {
            // What to do with the file, e.g. display it in a TextArea
            CSVReader reader = new CSVReader(new FileReader( file.getAbsolutePath()));
            List myEntries = reader.readAll();
            table (myEntries.toArray());
        } catch (IOException ex) {
            System.out.println("problem accessing file"+file.getAbsolutePath());
        }
    } else {
        System.out.println("File access cancelled by user.");
    }
}

that’s my code for the specific problem.

How do I make this work properly?

Answer 1

only the suggestions

1. you can to put Vector or Object[] to the JTable directly

2. for java.util.List you have to implements custom AbstractTableModel, because JTable and its XxxTableModel is based on premature Vector or Object[]

3. all updates to the XxxTableModel must be done on EventDispatchThread

4. for better help sooner post an SSCCE, where contens from CSV File should be hardcoded to the java.util.List directly

5. all data for JTable (view) are stored into XxxTableModel (model)