java - 我没有得到列名

Question

我在 JPanel 中放置了一个 JTable，但是在显示时，我看到了表格内容，但看不到列名。

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));
    }
}

Answer 1

有两种方法

• (正确的方法)必须将JTable放到JScrollPane中，然后JTableHeader可见

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• 从JTable获取JTableHeader(将JPanel的LayoutManager更改为BorderLayout) 并放入JPanel

中的NORTH area