在ActionEvent上向JPanel添加新的JTable

Question

While I am using

pnlmain.add(table); 

It's showing table without ColumnNames , instead when I used

pnlmain.add(new JScrollPane(table),BorderLayout.CENTER);

it's showing nothing in the panel. So, what to do for showing ColumnNames to the JTable while the table is displaying in JPanel .

Answer 1

A component can only have a single parent. Make sure your code only adds the table to the scroll pane and no other panel.

Also, if you add a component to a visible GUI you need to revalidate() and repaint() the panel.

If you need more help, then post a proper SSCCE that demonstrates the problem.

Answer 2

If you don't want to use scroll bar, use below code to show column names:

pnlmain.add(table.getTableHeader(),BorderLayout.NORTH);
pnlmain.add(table,BorderLayout.CENTER);