Hogyan adjak oszlopokat a táblázatomhoz?

Van egy programom aminek a feladata h tudjak bele egy névsort irni meg jegyeket és hiányzást ez meg is van de nem tudom növelni az oszlopok számát. Ha valakinek van valamiötlete az jól jönne

Itt a kód :

import java.util.Vector;

import javax.swing.*;

import javax.swing.table.DefaultTableModel;

import javax.swing.table.TableColumn;

import javax.swing.table.TableColumnModel;

/**

*

* @author Sabolch

*/

public class Uchet extends javax.swing.JFrame {

int j=1;

JComboBox combo = new JComboBox();

Vector vec = new Vector();

private Object[] value = {"H","", "1", "2", "3", "4","5"};

//int count = 2;

public Uchet() {

initComponents();

tb.getColumnModel().getColumn(0).setPreferredWidth(40);

tb.getColumnModel().getColumn(1).setPreferredWidth(600);

DefaultTableModel model = (DefaultTableModel) tb.getModel();

DefaultComboBoxModel comboModel = new DefaultComboBoxModel( value );

combo.setModel( comboModel );

for(int i = 2; i < model.getColumnCount(); i++){

//count++;

TableColumn count = tb.getColumnModel().getColumn( i );

count.setCellEditor( new DefaultCellEditor( combo ) );

}

}

@SuppressWarnings("unchecked")

// <editor-fold defaultstate="collapsed" desc="Generated Code">

private void initComponents() {

jScrollPane1 = new javax.swing.JScrollPane();

tb = new javax.swing.JTable();

btnAdd = new javax.swing.JButton();

btnDel = new javax.swing.JButton();

jButton1 = new javax.swing.JButton();

jScrollPane2 = new javax.swing.JScrollPane();

tbocinki = new javax.swing.JTable();

jButton2 = new javax.swing.JButton();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

tb.setFont(new java.awt.Font("Times New Roman", 0, 12)); // NOI18N

tb.setModel(new javax.swing.table.DefaultTableModel(

new Object [][] {

},

new String [] {

"№", "ПІБ", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20"

}

) {

Class[] types = new Class [] {

java.lang.Integer.class, java.lang.String.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class, java.lang.Integer.class

};

public Class getColumnClass(int columnIndex) {

return types [columnIndex];

}

});

tb.setFocusable(false);

tb.setIntercellSpacing(new java.awt.Dimension(2, 2));

tb.setRowSelectionAllowed(false);

tb.addMouseListener(new java.awt.event.MouseAdapter() {

public void mouseClicked(java.awt.event.MouseEvent evt) {

tbMouseClicked(evt);

}

});

jScrollPane1.setViewportView(tb);

if (tb.getColumnModel().getColumnCount() > 0) {

tb.getColumnModel().getColumn(0).setResizable(false);

tb.getColumnModel().getColumn(1).setResizable(false);

tb.getColumnModel().getColumn(2).setResizable(false);

tb.getColumnModel().getColumn(3).setResizable(false);

tb.getColumnModel().getColumn(4).setResizable(false);

tb.getColumnModel().getColumn(5).setResizable(false);

tb.getColumnModel().getColumn(6).setResizable(false);

tb.getColumnModel().getColumn(7).setResizable(false);

tb.getColumnModel().getColumn(8).setResizable(false);

tb.getColumnModel().getColumn(9).setResizable(false);

tb.getColumnModel().getColumn(10).setResizable(false);

tb.getColumnModel().getColumn(11).setResizable(false);

tb.getColumnModel().getColumn(12).setResizable(false);

tb.getColumnModel().getColumn(13).setResizable(false);

tb.getColumnModel().getColumn(14).setResizable(false);

tb.getColumnModel().getColumn(15).setResizable(false);

tb.getColumnModel().getColumn(16).setResizable(false);

tb.getColumnModel().getColumn(17).setResizable(false);

tb.getColumnModel().getColumn(18).setResizable(false);

tb.getColumnModel().getColumn(19).setResizable(false);

tb.getColumnModel().getColumn(20).setResizable(false);

tb.getColumnModel().getColumn(21).setResizable(false);

}

btnAdd.setText("Add");

btnAdd.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

btnAddActionPerformed(evt);

}

});

btnDel.setText("Delete");

btnDel.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

btnDelActionPerformed(evt);

}

});

jButton1.setText("Atlag");

jButton1.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

jButton1ActionPerformed(evt);

}

});

tbocinki.setModel(new javax.swing.table.DefaultTableModel(

new Object [][] {

},

new String [] {

}

));

jScrollPane2.setViewportView(tbocinki);

jButton2.setText("Oszlop hozzáad");

jButton2.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

jButton2ActionPerformed(evt);

}

});

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());

getContentPane().setLayout(layout);

layout.setHorizontalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(layout.createSequentialGroup()

.addContainerGap()

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(layout.createSequentialGroup()

.addComponent(btnAdd)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(btnDel)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)

.addComponent(jButton1)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(jButton2))

.addGroup(layout.createSequentialGroup()

.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 1124, javax.swing.GroupLayout.PREFERRED_SIZE)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 88, javax.swing.GroupLayout.PREFERRED_SIZE)))

.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))

);

layout.setVerticalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(layout.createSequentialGroup()

.addContainerGap()

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)

.addComponent(jScrollPane2)

.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 508, Short.MAX_VALUE))

.addGap(35, 35, 35)

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)

.addComponent(btnAdd)

.addComponent(btnDel)

.addComponent(jButton1)

.addComponent(jButton2))

.addContainerGap(24, Short.MAX_VALUE))

);

pack();

}// </editor-fold>

private void tbMouseClicked(java.awt.event.MouseEvent evt) {

/*int r = tb.rowAtPoint(evt.getPoint());

int col = tb.columnAtPoint(evt.getPoint());

if (r >= 0 && r < tb.getRowCount()) {

tb.setRowSelectionInterval(r, r);

} else {

tb.clearSelection();

}

int rowindex = tb.getSelectedRow();

if (rowindex < 0)

return;

if (evt.getComponent() instanceof JTable ) {

if(tb.getSelectedColumn()==0||tb.getSelectedColumn()==1){

}

else{

tb.getColumnModel().getColumn(col).setHeaderValue("00.00");

}

}*/

}

private void btnAddActionPerformed(java.awt.event.ActionEvent evt) {

DefaultTableModel model = (DefaultTableModel) tb.getModel();

if(j<51){

Object [] sorszam = {j++};

model.addRow(sorszam);}

}

private void btnDelActionPerformed(java.awt.event.ActionEvent evt) {

DefaultTableModel model = (DefaultTableModel) tb.getModel();

if(j>1){

model.removeRow(model.getRowCount()-1);

j--;}

}

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

DefaultTableModel modeloc = (DefaultTableModel) tbocinki.getModel();

int jegy=0;

int counter = 0;

int hianyzas =0;

double ocinka = 0;

for(int l=0;l<tb.getRowCount(); l++){

for(int j=2; j<21; j++){

Object obj = tb.getValueAt(l, j);

if(obj != "H" && obj != null && obj != ""){

jegy += Integer.valueOf((String) obj);

counter++;

}

if (obj=="H"){

hianyzas++;

}

}

if(jegy !=0){ocinka = Math.rint(jegy/counter);

if(ocinka > 2 && hianyzas < 8){

vec.add(ocinka);

jegy=0;

counter=0;

hianyzas=0;

}else {vec.add("Н/А");

jegy=0;

counter=0;

hianyzas=0;}}

else {

vec.add("Н/А");

jegy=0;

counter=0;

hianyzas=0;

}

}

for( int i = modeloc.getRowCount() - 1; i >= 0; i-- )

{

modeloc.removeRow(i);

}

modeloc.setColumnCount(0);

modeloc.addColumn("Ocinki",vec);

vec.clear();

}

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {

DefaultTableModel model = (DefaultTableModel) tb.getModel();

model.addColumn("kkkk");

}

public static void main(String args[]) {

/* Set the Nimbus look and feel */

//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">

/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.

* For details see [link]

*/

try {

for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {

if ("Nimbus".equals(info.getName())) {

javax.swing.UIManager.setLookAndFeel(info.getClassName());

break;

}

}

} catch (ClassNotFoundException ex) {

java.util.logging.Logger.getLogger(Uchet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);

} catch (InstantiationException ex) {

java.util.logging.Logger.getLogger(Uchet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);

} catch (IllegalAccessException ex) {

java.util.logging.Logger.getLogger(Uchet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);

} catch (javax.swing.UnsupportedLookAndFeelException ex) {

java.util.logging.Logger.getLogger(Uchet.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);

}

//</editor-fold>

/* Create and display the form */

java.awt.EventQueue.invokeLater(new Runnable() {

public void run() {

new Uchet().setVisible(true);

}

});

}

// Variables declaration - do not modify

private javax.swing.JButton btnAdd;

private javax.swing.JButton btnDel;

private javax.swing.JButton jButton1;

private javax.swing.JButton jButton2;

private javax.swing.JScrollPane jScrollPane1;

private javax.swing.JScrollPane jScrollPane2;

private javax.swing.JTable tb;

private javax.swing.JTable tbocinki;

// End of variables declaration

}