how to add JTable in JFrame at Run time?

Question

I am using a JFrame & JPanel to create a frame.JFrame contains comboboxes,CheckBoxes,JLabels etc.Layout of JPanel is set to "null",because i am using setBounds(int,int,int,int) to set the position of components on JFrame.

There is also a JButton(named as "Submit").On submit button i have added actionListener,so that if i click on this button,A table will generate on frame(at runtime).

JTable is successfully displaying on JFrame but Table columns name are not displaying along with JFrame(Only table data is displaying when submit button is pressed).

I am also using setBounds with JTable.What should i have to do in this case ?

submitButton.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent e)
    {
       Object ColumnName[] = {"Document Name", "Modified Date", "Size(in MB)"};
       Object data[][] = { {"test.txt", "24-Oct-2011", "540"}};
       table = new JTable(data,ColumnName);
       table.setBounds(20,230,330,100);
       panel.add(table);
       panel.repaint();
       panel.revalidate();
     }
});

Give me your all valuable suggestions soon. Thank you.

`Give me your all valuable suggestions soon. Thank you.` == then follows suggestion by @Amn +1, there are all valuable stuff — mKorbel, Oct 31 '11 at 10:47
@mKorbel Sir i followed the same way which was suggested by Amn.But this is not working,all components are not add to the frame after using this way. — SilentBomb, Oct 31 '11 at 11:02

score 2 · Accepted Answer · answered Oct 31 '11 at 09:26

2

may it works revalidate(); method of panel . call after setting table on panel.
but JScrollPane is best way to do this.

answered Oct 31 '11 at 09:26

Sumit Singh

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I have used repaint() & revalidate() methods after adding table to panel.All RowData(Data) is displaying but without column Name. – SilentBomb Oct 31 '11 at 09:29

score 2 · Answer 2 · edited Nov 01 '11 at 06:04

2

I think that you couldn't:

Use setBounds(int, int, int, int), because this is job for LayoutManager
Recreate JTable at run time. Just implement DefalutTableModel, there you can add/remove TableRows, reset TableModel - all changes are immediately displayed in JTable.

And you could:

(As mentioned both posters) put JTable into a JScrollPane.
Go through examples from the table tutorial and tons of Swing related examples here.

edited Nov 01 '11 at 06:04

Andrew Thompson

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answered Oct 31 '11 at 11:07

mKorbel

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sir i am not using any LayoutManager(set to null).So thats why i am using setBounds() method. – SilentBomb Oct 31 '11 at 11:43
My Headername problem is solved. I am using two JPanels panel1 & panel2. panel1 contains all the components(including Submit Button) and panel2 contains the jtable(when submit button is clicked).But now the jtable is displaying on whole frame(including panel1).Can you suggest me solution to fix the both panels positions. – SilentBomb Oct 31 '11 at 12:31
depends what JComponents are pleaced into 1st. JPanel, if is there only services for JTable, then follows tutorial for BorderLayout and place this JPanel to the NORTH or SOUTH area and JTable (inside JScrollPanel)to the CENTER area, then you GUI is pretty resiziable, better would be start new thread about layout JCompoentns in the GUI, only a few JComponents, there are going about idea how to do it, not how to debug your your project :-) idea is described http://sscce.org/, then a chance of getting correct answer is higher – mKorbel Oct 31 '11 at 14:03

score 1 · Answer 3 · edited May 23 '17 at 10:34

1

You would need to add JTable into a JScrollPane first and then add that JScrollPane into your main panel.

JScrollPane jsp = new JScrollPane(jtable);

Have a look at this: JTable

EDIT: this thread discusses the same issue: Jtable Columns

edited May 23 '17 at 10:34

Community

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answered Oct 31 '11 at 09:20

Aman

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I am using only a JPanel,according to you i have added JScrollPane into my main Panel,but its not working.Edit : That thread was relates with database. – SilentBomb Oct 31 '11 at 09:24
I would assume that you would have to add the JPanel into your JFrame. SO the way its linked is: scrollpane.add(table) --> panel.add(scrollpane) --> frame.add(panel) – Aman Oct 31 '11 at 09:30
table = new JTable(data,ColumnName); table.setBounds(20,230,330,100); panel.add(table); panel.repaint(); panel.revalidate(); I am adding Jtable to Jframe by this way.Thia code is written at actionListener(at submit button) – SilentBomb Oct 31 '11 at 09:39
instead of adding the table into your panel, add it to a JScrollPane as I showed in my original reply and then add this scroll pane to your JPanel and finally add the JPanel to JFrame. Everything else would be same. JScrollPane creates a viewport for your table with column headers and scroll bars. – Aman Oct 31 '11 at 09:45
I did according to your suggestion,but its not working.Now even data is also not displaying.I want to ask that whether i have to declare JScrollPane scrollpane=new JScrollPane(); inside actionListener or outside. – SilentBomb Oct 31 '11 at 09:56
you can declare JScrollPane outside of action listener, may be in the class constructor and inside your actionlistener, you can instantiate it passing the jtable in the constructor like my original reply. – Aman Oct 31 '11 at 10:19
table = new JTable(data,ColumnName); table.setBounds(20,230,330,100); scroll.add(table); panel.add(scroll) ; panel.repaint(); panel.revalidate(); frame.add(panel); Using this code other components are also not displaying. – SilentBomb Oct 31 '11 at 10:30

how to add JTable in JFrame at Run time?

3 Answers3