hi friends.please help

java-programmer, hi friends.please help I am trying t make a jTable Using Abstract TableModel. But my JTable
doesnot appear on the frame.I have written two classes myTable and
jTable2 .My code is given below:

import javax.swing.*;
import java.awt.*;

public class myTable {
public static void main(String args[]){
JTable2 tbl2=new JTable2();
JTable aTbl=new JTable(tbl2);
aTbl.updateUI();
aTbl.setVisible(true);
JFrame frame=new JFrame("Jtable using AbstractTableModel");
JPanel pan=new JPanel();
JScrollPane scp=new JScrollPane();
scp.add(aTbl);
pan.add(scp);
frame.getContentPane().add(pan);
frame.setVisible(true);
frame.pack();
}

}

import javax.swing.*;
import java.sql.*;
import java.util.*;
import javax.swing.table.*;

public class JTable2 extends AbstractTableModel{
Connection con;
Statement stmt;
ResultSet rs;
int columns;
Vector allRows;
Vector row=new Vector();
String [] columnNames={"ID_CODE","NAME","SECTION"};

public JTable2(){
// connect to database
try{
db_connect();
getData();
}catch(Exception ex){
ex.printStackTrace();
}

}
void db_connect() throws SQLException{
try{
Class.forName("oracle.jdbc.driver.OracleDriver");

con=DriverManager.getConnection("jdbc:oracle:thin:@158.144.71.242:1521:dbadp","payroll","sush");
System.out.println("Connected");
}catch(Exception ex){
ex.printStackTrace();
}
}
void getData() throws SQLException {
try{
stmt=con.createStatement();
rs=stmt.executeQuery("select idcode,id_name,sec_code from
employee");
ResultSetMetaData rsMetaData=rs.getMetaData();
columns=rsMetaData.getColumnCount();
allRows=new Vector();
while(rs.next()){
Vector newRow=new Vector();
for(int i=1;i<=columns;i++){
newRow.addElement(rs.getObject(i));
}
allRows.addElement(newRow);
}

}catch (Exception ex){
ex.printStackTrace();
}
}
public int getRowCount(){
return allRows.size();
}
public int getColumnCount(){
return columns;
}
public Object getValueAt(int aRow,int aColumn){
row=(Vector) allRows.elementAt(aRow);
return row.elementAt(aColumn);
}
public boolean isCellEditable(int row, int col){
return false;
}

}

java-programmer >> hi friends.please help Two mistakes:
- the table needs to be passed to the constructor of the
JScrollPane
- at least one column needs to be added to the table

Fixed code:

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.TableColumn;

public class myTable {
public static void main(String args[]) {
JTable2 tbl2 = new JTable2();
JTable aTbl = new JTable(tbl2);
aTbl.addColumn(new TableColumn());
aTbl.updateUI();
aTbl.setVisible(true);
JFrame frame = new JFrame("Jtable using AbstractTableModel");
JPanel pan = new JPanel();
JScrollPane scp = new JScrollPane(aTbl);
pan.add(scp);
frame.getContentPane().add(pan);
frame.setVisible(true);
frame.pack();
}
}

--Dirk

On Feb 14, 10:07 am, mamta81 <email***@***.com> wrote:
> I am trying t make a jTable Using Abstract TableModel. But my JTable
> doesnot appear on the frame.I have written two classes myTable and
> jTable2 .My code is given below:
>
> import javax.swing.*;
> import java.awt.*;
>
> public class myTable {
> public static void main(String args[]){
> JTable2 tbl2=new JTable2();
> JTable aTbl=new JTable(tbl2);
> aTbl.updateUI();
> aTbl.setVisible(true);
> JFrame frame=new JFrame("Jtable using AbstractTableModel");
> JPanel pan=new JPanel();
> JScrollPane scp=new JScrollPane();
> scp.add(aTbl);
> pan.add(scp);
> frame.getContentPane().add(pan);
> frame.setVisible(true);
> frame.pack();
> }
>
> }
>
> import javax.swing.*;
> import java.sql.*;
> import java.util.*;
> import javax.swing.table.*;
>
> public class JTable2 extends AbstractTableModel{
> Connection con;
> Statement stmt;
> ResultSet rs;
> int columns;
> Vector allRows;
> Vector row=new Vector();
> String [] columnNames={"ID_CODE","NAME","SECTION"};
>
> public JTable2(){
> // connect to database
> try{
> db_connect();
> getData();
> }catch(Exception ex){
> ex.printStackTrace();
> }
>
> }
> void db_connect() throws SQLException{
> try{
> Class.forName("oracle.jdbc.driver.OracleDriver");
>
> con=DriverManager.getConnection("jdbc:oracle:thin:@158.144.71.242:1521:dbadp","payroll","sush");
> System.out.println("Connected");
> }catch(Exception ex){
> ex.printStackTrace();
> }
> }
> void getData() throws SQLException {
> try{
> stmt=con.createStatement();
> rs=stmt.executeQuery("select idcode,id_name,sec_code from
> employee");
> ResultSetMetaData rsMetaData=rs.getMetaData();
> columns=rsMetaData.getColumnCount();
> allRows=new Vector();
> while(rs.next()){
> Vector newRow=new Vector();
> for(int i=1;i<=columns;i++){
> newRow.addElement(rs.getObject(i));
> }
> allRows.addElement(newRow);
> }
>
> }catch (Exception ex){
> ex.printStackTrace();
> }
> }
> public int getRowCount(){
> return allRows.size();
> }
> public int getColumnCount(){
> return columns;
> }
> public Object getValueAt(int aRow,int aColumn){
> row=(Vector) allRows.elementAt(aRow);
> return row.elementAt(aColumn);
> }
> public boolean isCellEditable(int row, int col){
> return false;
> }
>
> }