Question

I have found similar questions here on Stackoverflow, but for some reason when I try to implement what is suggested, I get a strange exception.

So I am trying to get adjust some of the heights on 3 of the columns dynamically.

public class AcquisitionTechniquesPanel extends JPanel {
    private static final long serialVersionUID = -3326535610858334494L;

    public static final int SIZE_OF_TABLE = 8;

    private final JTable table;
    private JCheckBox acquisitionTechniquesDone;

    private Object[][] tableData;
    private final String[] columnNames;

    public AcquisitionTechniquesPanel() {
        this.columnNames = new String[] { ApplicationStrings.ID, ApplicationStrings.TYPE, "Foo", "Bar", "Biz", "Baz", "Boz", ApplicationStrings.NO_OF_AR_S };
        this.table = new JTable(tableData, columnNames);

        initGUI();
    }


    public void initGUI() {
      table.setColumnSelectionAllowed(
      table.setDragEnabled(false);
      table.setOpaque(true);
      table.getTableHeader().setReorderingAllowed(false);
      table.setModel(new DefaultTableModel());
      JScrollPane scrollPane = new JScrollPane(table);
      scrollPane.setPreferredSize(new Dimension(800, 320));

      SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                table.getColumnModel().getColumn(2).setCellRenderer(new VariableRowHeightRenderer());
                table.getColumnModel().getColumn(3).setCellRenderer(new VariableRowHeightRenderer());
                table.getColumnModel().getColumn(4).setCellRenderer(new VariableRowHeightRenderer());
            }
        });
    }

public static class VariableRowHeightRenderer extends JLabel implements TableCellRenderer {
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            setText(String.valueOf(value));
            if(getPreferredSize().height > 1)
                table.setRowHeight(row, getPreferredSize().height);
            return this;
        }
    }
}

Now when I run this code, for some reason I get java.lang.ArrayIndexOutOfBoundsException: 2 >= 0
I get this exception on the code table.getColumnModel().getColumn(2).setCellRenderer(new VariableRowHeightRenderer());
Which is strange, because the table should have 8 columns.

Does anyone know what I am doing wrong?

Please note that I am only showing relevant code

Answer 1

The problem comes from here:

table.setModel(new DefaultTableModel());

You set an empty model on your JTable and therefore overwrite the implicit model you have created with the JTable constructor. Simply remove that line and you should have your 8 columns.

Btw, there is no need to wrap your call in an invokeLater.