JTable 没有显示任何信息。 从文本文件中读取并将其添加到 DefaultTableModel

Question

I am working on a Java Swing project and I am trying to understand how to use JTable .

I have a text file with a list of user information which is all separated by a comma without spaces. I am trying to get this information to be displayed in a table, however, when I run the form the table, it remains blank and never shows anything.

Here is my code:

private JTable listUsersTable;

// ...

String[] columnNames = {"USERNAME", "NAME", "SURNAME", "AGE", "SEX", "SITE"};

// Creates a table with the column names and zero rows.
DefaultTableModel model = new DefaultTableModel(columnNames, 0);

try {
    BufferedReader reader = new BufferedReader(new FileReader("userArchive.txt"));

    // Reads each line in the file "userArchive.txt", separates the data, and puts them into the table.
    String line = reader.readLine();

    while (line != null) {
        String[] lineSplit = line.split(",");
        model.addRow(lineSplit);
        line = reader.readLine(); // Goes to the next line in the file.
    }
    reader.close();

    listUsersTable = new JTable(model);

} catch (FileNotFoundException e5) {
    e5.printStackTrace();
} catch (IOException ex) {
      ex.printStackTrace();
}

And here is my current JTable layout & settings using intelliJ's GUI designer:

Image of my intelliJ GUI designer setup and the JTable in question. (The JTable in the image is called verUsuariosTable however in the code this is called listUsersTable . This is because I am writing my code in Spanish but translating everything to ask the question).

Answer 1

I needed to include JScrollPane to the code. This link shows completely what is needed to work with text files and JTables. ( How do I read separate parts from a txt File to show in Java GUI? ).

I needed to add

listUsersTable.setPreferredScrollableViewportSize(listUsersTable.getPreferredSize());
JScrollPane scrollPane = new JScrollPane(listUsersTable);

and then add the scrollPane to the panel I was working with using

currentPanel.add(scrollPane);