problem in erasing panel

[sagar khana]

hey i am new in java n getting this problem

i want to create a program in which i am retrieving data from database and showing in gui frame but i want when submit pressed old frame's data should be get erased but instead of that it appends in that

thank you for your help

package javaapplication48;
import java.awt.BorderLayout;
import java.io.*;
import java.sql.*;
import javax.swing.*;
import java.awt.event.*;
public class JavaApplication48 implements ActionListener
{
private JFrame f1,f2;
ResultSet rs;
private JPanel p1,p2,p3,p4,p5;
private JLabel l1,l2;
private JRadioButton r1,r2,r3,r4;
private JButton b1;
public int id,i=1;
private String ques,a,b,c,d,cor;
Box b2=Box.createVerticalBox();
public JavaApplication48() {
f1=new JFrame("eww");
f2=new JFrame("result");
b1=new JButton("Submit");
    }

public void launch()
{
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:cone");
try
{

Statement st=con.createStatement();
String str="SELECT * FROM quizcontest where id="+i;
rs=st.executeQuery(str);
while(rs.next())
{
id=rs.getInt("id");
ques=rs.getString("ques");
a=rs.getString("a");
b=rs.getString("b");
c=rs.getString("c");
d=rs.getString("d");
cor=rs.getString("cor");
}

con.close();
}

catch(SQLException e)
{
System.out.println("Table creation process denied");}
}

catch(Exception e)
{
e.printStackTrace();
}
p1=new JPanel();
p2=new JPanel();
p3=new JPanel();
p4=new JPanel();
p5=new JPanel();
l1=new JLabel(ques);
r1=new JRadioButton(a);
r2=new JRadioButton(b);
r3=new JRadioButton(c);
r4=new JRadioButton(d);

p1.add(l1);
b2.add(p1);

p2.add(r1);
p2.add(r2);
b2.add(p2);

p3.add(r3);
p3.add(r4);
b2.add(p3);

p4.add(b1);
b2.add(p4);
f1.add(b2,BorderLayout.CENTER);
f1.setSize(400,400);
//f1.pack();
f1.setVisible(true);
b1.addActionListener(this);
}

//    @Override
    public void actionPerformed(ActionEvent e) {
    f1.dispose();
    
    i++;
    launch();
    }

    public static void main(String[] args)
    {
        JavaApplication48 ob=new JavaApplication48();
        ob.launch();
    }


}

[Michael Dunn]

Instead of disposing/recreating everything,
just change the text of the question label
and the four answer radiobuttons

[sagar khana]

Michael Dunn wrote:Instead of disposing/recreating everything,
just change the text of the question label
and the four answer radiobuttons

that is changed every time i press submit

but still old data are still in panel didnt erased out

[Rob Camick]

Your launch() method should NOT create components.

It should do the database query and then update existing components on the frame by using setText(), setModel() or whatever method is used to change the data in an existing component.

[sagar khana]

Rob Camick wrote:Your launch() method should NOT create components.

It should do the database query and then update existing components on the frame by using setText(), setModel() or whatever method is used to change the data in an existing component.

i make different function and it works thank you