How to retrieve data from mysql database from what is the input on my textfield - user-interface

Question

For example I have entered my pin to 123 in my text field I want that program to Show the balance, card number and account number of that certain pin
i used setters and getters to get the pin from the previous frame (login)
Here is my code
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.event.*;
import java.sql.*;
import javax.swing.table.*;
public class Test extends JFrame
{
private static final Test sh1 = new Test();
public static Test getInstance()
{
return sh1;
}
Container c;
Connection con;
Statement st;
ResultSet rs;
ResultSetMetaData rm;
JTable tb;
JButton btnback = new JButton("Back");
JTextField pin = new JTextField("");
public void setUser(String user) {this.pin.setText(user);}
public String getUser() {return this.pin.getText();}
public Test(){
this.setTitle("Data");
this.setSize(500,500);
this.setLocation(800, 80);
this.setBackground(Color.black);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
c=this.getContentPane();
c.setLayout(new FlowLayout());
c.add(btnback);
c.add(pin);
stud();
}
public void stud()
{
Vector ColName = new Vector();
Vector Data = new Vector();
try{
String driver="com.mysql.jdbc.Driver";
String db="jdbc:mysql://localhost:3306/atm";
String user="root";
String pass="";
Class.forName(driver);
con=DriverManager.getConnection(db,user,pass);
st=con.createStatement();
String pincodee = pin.getText().trim();
String sqltb = "Select balance,cardnumber , accountnumber from accounts WHERE "
+ "pincode = '"+pincodee+"' ";
rs = st.executeQuery(sqltb);
rm = rs.getMetaData();
int col = rm.getColumnCount();
for(int i = 1; i <= col; i++)
{
ColName.addElement(rm.getColumnName(i));
}
while(rs.next())
{
Vector row = new Vector(col);
for(int i = 1; i <= col; i++)
{
row.addElement(rs.getObject(i));
String s = rs.getString(2);
pin.setText(s);
}
Data.addElement(row);
}
}
catch (Exception ex)
{
}
tb = new JTable( Data, ColName);
tb.repaint();
JScrollPane sc = new JScrollPane(tb);
sc.validate();
c.add(sc);
}
public static void main(String[] args)
{
Test s = new Test();
s.setVisible(true);
}
}

Answer 1

You need to create a button which says 'Go!' or something like that and add an action listener to it that calls your stud() method.
look here for example..
http://www.javaprogrammingforums.com/java-swing-tutorials/278-how-add-actionlistener-jbutton-swing.html
Your code is not going to work either way, you need to rewrite a great deal of it but the ActionListener class is your friend if you want actions on the user interface to call logic code.