I am not getting names of column

Question

I am placing a JTable in a JPanel, but when I am displaying, I see the table contents but not the column names.

public class Neww extends JPanel
{
    Connection conn = null;
    Statement st;
    DefaultTableModel model = new DefaultTableModel(new Object[][] {
        { " ", " " },
        { " ", " " },
        { " ", " " },
        { " ", " " },
        { " ", " " },
        { " ", " " }
    }, new Object[] {
        "ItemName",
        "No of items"
    });

    JTable table = new JTable(model);
    TableColumn ItemName = table.getColumnModel().getColumn(0);
    JComboBox comboBox = new JComboBox();
    Neww()
    {
        this.setLayout(new FlowLayout(FlowLayout.CENTER));
        this.add(table);

        comboBox.addItem("Spoon");
        comboBox.addItem("Plate");
        comboBox.addItem("Mixer");
        comboBox.addItem("Glass");
        ItemName.setCellEditor(new DefaultCellEditor(comboBox));
    }
}

score 3 · Answer 1 · answered Dec 05 '12 at 10:59

3

there are two ways

(proper of ways) have to put JTable to the JScrollPane, then JTableHeader is visible
get JTableHeader from JTable (change JPanels LayoutManager to BorderLayout) and put to NORTH area in JPanel

answered Dec 05 '12 at 10:59

mKorbel

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David Kroukamp · Answer 2 · 2012-12-05T12:24:49.010

1) Wrap your JTable within JScrollPane. Like this:

JTable table=...;

JPanel container = new JPanel();

JScrollPane jsp=new JScrollPane(table);

container.add(jsp);

2) Use getTableHeader() and add it where needed (usually north positioned though):

...

JTableHeader header = table.getTableHeader();

JPanel container = new JPanel(new BorderLayout());

// Add header at NORTH position
container.add(header, BorderLayout.NORTH);

//Add table below header
container.add(table, BorderLayout.CENTER);

score 1 · Answer 3 · edited May 23 '17 at 11:55

Following statement is creating problem in your code.

 this.add(table);

Use scroll pane while adding table.

 add(new JScrollPane(table));

Why should we use JScrollPane?

As stated by @OscarRyz in this comment.

The table header it put into the JScrollPane top component ( or top view or something like that is named ) When there is no top component the JTable appears headless. This is by design.

Edit: Also look this answer for more details.

I am not getting names of column

3 Answers3