How to change Jtable Total Rows in runtime ?

[raminaa niilian]

Thank you for reading my post
How i can change number of rows in a JTable at runtime ?
for example if it has 4 rows in when i made the table and i
want it to has 20 rows in some case
what property of Jtable give the bility to me ?

[Michael Dunn]

here's a basic way

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
 
class Testing extends JFrame
{
  String colNames[] = {"Column 1", "Column 2", "Column 3"};
  DefaultTableModel dtm = new DefaultTableModel(null,colNames);
  public Testing()
  {
    setLocation(200,100);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JTable table = new JTable(dtm);
    JScrollPane sp = new JScrollPane(table);
    JPanel panel = new JPanel(new BorderLayout());
    panel.add(sp,BorderLayout.CENTER);
    JPanel btnPanel = new JPanel();
    JButton btn = new JButton("Add 10 Rows");
    btnPanel.add(btn);
    panel.add(btnPanel,BorderLayout.SOUTH);
    getContentPane().add(panel);
    pack();
    btn.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        for(int x = 0; x < 10; x++)
        {
          dtm.addRow(new String[3]);
        }}});
  }
  public static void main (String[] args){new Testing().setVisible(true);}
}

[raminaa niilian]

Hi
Thank you very much.
it helped too much , and now i havemy table , without out of bound exception.