DefaultTableModel Java Example

 import java.awt.*; 
 import javax.swing.*; 
 import java.awt.event.*; 
 import javax.swing.table.*; 
 public class JavaExampleTableAddInJApplet extends JApplet 
 { 
     Object[] Dt= new Object[5]; 
     DefaultTableModel DfltTblModl = new DefaultTableModel(); 
     JTable Tbl = new JTable(DfltTblModl); 
     public void init() 
       { 
         for(int Clmn = 0; Clmn < 5; Clmn++) 
            { 
               DfltTblModl.addColumn("Column " +Clmn); 
            } 
               for(int row = 0; row < 5; row++) 
              { 
                      for(int Clmn = 0; Clmn < 5; Clmn++) 
                      { 
                               Dt[Clmn] = "Cell " + row + "," + Clmn; 
                          } 
                               DfltTblModl.addRow(Dt); 
                  } 
                       //jtable.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS); 
                        getContentPane().add(new JScrollPane(Tbl), BorderLayout.CENTER); 
                        getContentPane().add(new jpanel(), BorderLayout.SOUTH); 
          } 
                        class jpanel extends JPanel implements ActionListener 
                          { 
                               private JButton BtnCrtRow = new JButton("Create new row"), 
                               BtnCrtClmn = new JButton("Create new column"); 
                              public jpanel() 
                                { 
                                   add(BtnCrtRow); 
                                   add(BtnCrtClmn); 
                                    BtnCrtRow.addActionListener(this); 
                                   BtnCrtClmn.addActionListener(this); 
                               } 
                                   public void actionPerformed(ActionEvent e1) 
                                   { 
                                        if(e1.getSource() == BtnCrtRow) 
                                 { 
                                                 int NmbrRows = DfltTblModl.getRowCount(); 
                                                 int NmbrClmn = DfltTblModl.getColumnCount(); 
                                                Object[] data = new Object[NmbrClmn]; 
                                                for(int Clmn = 0; Clmn < NmbrClmn; Clmn++) 
                                      { 
                                                       Dt[Clmn] = "Cell " + NmbrRows + "," + Clmn; 
                                                  } 
                                                       DfltTblModl.addRow(Dt); 
                                         } 
                                           else if(e1.getSource() == BtnCrtClmn) 
                                                { 
                                                                int NmbrRows = DfltTblModl.getRowCount(); 
                                                                int NmbrClmn = DfltTblModl.getColumnCount(); 
                                                                DfltTblModl.addColumn("Column " + NmbrClmn); 
                                                                for(int row = 0; row < NmbrRows; row++) 
                                                   { 
                                                                       DfltTblModl.setValueAt("Cell " + row + "," +NmbrClmn, row,NmbrRows); 
                                                                   } 
                                                                       Tbl.sizeColumnsToFit(0); 
                                                            } 
                                  } 
                         } 
   } 
 /*<APPLET CODE=JavaExampleTableAddInJApplet.class WIDTH=360 HEIGHT=290></APPLET>*/