Capturing data from JTable and passing it to a class

Question

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.table.AbstractTableModel;
import java.security.*;
import java.security.spec.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import javax.swing.SwingUtilities;
public class ProjectTable2 extends JFrame implements ActionListener
JButton Up;
// String lecturer_data[][];
public ProjectTable2()
super("Lecturer Table");
setSize(300, 200);
// addWindowListener(new BasicWindowMonitor());
//JButton Up = new JButton("Update");
//Up.addActionListener(this);
//getContentPane().add(Up, BorderLayout.SOUTH);
TableModel tm = new AbstractTableModel()
//JTable jt = new JTable(tm);
//JScrollPane jsp = new JScrollPane(jt);
//getContentPane().add(jsp, BorderLayout.CENTER);
Object[][] data = {
{"Sandip", "Vekaria", "ee99c9", "A"},
{"Manesh", "Mistry", "ee99b4", "A"},
{"Barry", "Kwok", "ee99b6", "A"},
{"Nikhil", "Nag", "ee99b3", "A"},
{"Kevin", "Jervis", "ee99b1", "A"}};
/* lecturer_data[][] = new String[data.length][4];
for(int row = 0; row < data.length; row++)
for(int col = 0; col <= 3; col++)
lecturer_data[row][col] = data[row][col];
String[] headers = {"First Name", "Second Name", "UserName", "Grades"};
public int getRowCount() { return data.length;  }
public int getColumnCount() {return headers.length; }
public String getColumnName(int c) {return headers[c]; }
public Object getValueAt(int r, int c) {return data[r][c]; }
public boolean isCellEditable(int r, int c)
if (c < 3)
return false;
else
return true;
/* Returns cell information of a record at location row,column
public synchronized Object getValueAt(int r, int c)
try
ProjectTable2 p = (ProjectTable2)data.elementAt(r;
switch (c)
case 0:
return (String)p.val1;
case 1:
return (String)p.val2;
case 2:
return new Integer(p.val3);
catch (Exception e)
return "";
public void setValueAt(Object value, int r, int c)
if (c >=3)
System.out.println("Setting value at " + r +", " + c + " to " + value);
else {data[r][c] = value;}
data[r][c] = value;
fireTableCellUpdated(r, c);
JTable jt = new JTable(tm);
JScrollPane jsp = new JScrollPane(jt);
getContentPane().add(jsp, BorderLayout.CENTER);
Up = new JButton("Update");
Up.addActionListener(this);
getContentPane().add(Up, BorderLayout.SOUTH);
public void actionPerformed(ActionEvent bc)
// fireTableCellUpdated(r, c);
if(bc.getSource()==Up)
Lecturer nameGrades = new Lecturer("Raul Mondragon", "ele_956", true);
// nameGrades.setTableDataUpdate(lecturer_data);
//no_of_rows = tm.
System.out.println("Update");
// nameGrades.printDetails3();
// nameGrades.printDetails4();
//JTable jt = new JTable(tm);
//JScrollPane jsp = new JScrollPane(jt);
// getContentPane().add(jsp, BorderLayout.CENTER);
public static void main(String args[])
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
ProjectTable2 pt = new ProjectTable2();
pt.setVisible(true);
Somebody please help!!

Answer 1

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.table.AbstractTableModel;
import java.security.*;
import java.security.spec.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import javax.swing.SwingUtilities;
public class ProjectTable2 extends JFrame implements ActionListener
JButton Up;
// String lecturer_data[][];
public ProjectTable2()
super("Lecturer Table");
setSize(300, 200);
// addWindowListener(new BasicWindowMonitor());
//JButton Up = new JButton("Update");
//Up.addActionListener(this);
//getContentPane().add(Up, BorderLayout.SOUTH);
TableModel tm = new AbstractTableModel()
//JTable jt = new JTable(tm);
//JScrollPane jsp = new JScrollPane(jt);
//getContentPane().add(jsp, BorderLayout.CENTER);
Object[][] data = {
{"Sandip", "Vekaria", "ee99c9", "A"},
{"Manesh", "Mistry", "ee99b4", "A"},
{"Barry", "Kwok", "ee99b6", "A"},
{"Nikhil", "Nag", "ee99b3", "A"},
{"Kevin", "Jervis", "ee99b1", "A"}};
/* lecturer_data[][] = new String[data.length][4];
for(int row = 0; row < data.length; row++)
for(int col = 0; col <= 3; col++)
lecturer_data[row][col] = data[row][col];
String[] headers = {"First Name", "Second Name", "UserName", "Grades"};
public int getRowCount() { return data.length;  }
public int getColumnCount() {return headers.length; }
public String getColumnName(int c) {return headers[c]; }
public Object getValueAt(int r, int c) {return data[r][c]; }
public boolean isCellEditable(int r, int c)
if (c < 3)
return false;
else
return true;
/* Returns cell information of a record at location row,column
public synchronized Object getValueAt(int r, int c)
try
ProjectTable2 p = (ProjectTable2)data.elementAt(r;
switch (c)
case 0:
return (String)p.val1;
case 1:
return (String)p.val2;
case 2:
return new Integer(p.val3);
catch (Exception e)
return "";
public void setValueAt(Object value, int r, int c)
if (c >=3)
System.out.println("Setting value at " + r +", " + c + " to " + value);
else {data[r][c] = value;}
data[r][c] = value;
fireTableCellUpdated(r, c);
JTable jt = new JTable(tm);
JScrollPane jsp = new JScrollPane(jt);
getContentPane().add(jsp, BorderLayout.CENTER);
Up = new JButton("Update");
Up.addActionListener(this);
getContentPane().add(Up, BorderLayout.SOUTH);
public void actionPerformed(ActionEvent bc)
// fireTableCellUpdated(r, c);
if(bc.getSource()==Up)
Lecturer nameGrades = new Lecturer("Raul Mondragon", "ele_956", true);
// nameGrades.setTableDataUpdate(lecturer_data);
//no_of_rows = tm.
System.out.println("Update");
// nameGrades.printDetails3();
// nameGrades.printDetails4();
//JTable jt = new JTable(tm);
//JScrollPane jsp = new JScrollPane(jt);
// getContentPane().add(jsp, BorderLayout.CENTER);
public static void main(String args[])
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
ProjectTable2 pt = new ProjectTable2();
pt.setVisible(true);
Somebody please help!!