Dynamically adding JTable to JScrollPane

Question

I have a table that I want to populate when the user prompts me to do so. Problem is, I can't anticipate how many rows the table will end up having. In the constructor for my panel where the table will be displayed I have ``` // add empty scrollPane to JPanel which will later hold table scrollPane = new JScrollPane(); add(scrollPane); ``` This class contains a method that will be called when I want to finally display the table ``` public void displayTable(String[] columnNames, String[][] dataValues) { table = new JTable(dataValues, columnNames); table.setPreferredScrollableViewportSize(new Dimension(300, 80)); table.setFillsViewportHeight(true); scrollPane.add(table); this.setVisible(true); scrollPane.repaint(); } ``` Problem is, the table never displays. I just see an outline of where the ScrollPane is with no table inside. Why isn't the table displaying and how can I fix it?

Accepted Answer

You should add component not to JScrollPane but to its JViewport:

```
scrollPane.getViewport ().add (table);
```

Dynamically adding JTable to JScrollPane

Solution

Problem