Employee java project

import java.io.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.sql.*;
import java.util.*;

class EmployeeInformation {
JFrame f;
JPanel p1,p2,p3;
JTabbedPane tp;
ImageIcon btnimg1,btnimg2;
JLabel l1, l2, l3, l4,l5,l6,l7,l8,l9,l10;
JTextField tf1,tf2,tf3,tf4,tf5,tf6,tf7,tf8,tf9,tf10;
JScrollPane sp1;
JButton savebtn,resetbtn,editbtn1,editbtn2,deletebtn ;

EmployeeInformation(){
f=new JFrame("Form");
p1=new JPanel(new GridLayout(5,2));
p2=new JPanel(new GridLayout(5,2));
p3=new JPanel(new GridLayout(2,2));
tp=new JTabbedPane();
l1=new JLabel("Employee ID:");
l2=new JLabel("Employee Name:");
l3=new JLabel("Employee Address:");
l4=new JLabel("Salary:");
l5=new JLabel("Enter Employee ID to delete record:");

l7=new JLabel("Employee ID:");
l8=new JLabel("Employee Name:");
l9=new JLabel("Employee Address:");
l10=new JLabel("Salary:");
tf1=new JTextField(12);
tf2=new JTextField(12);
tf3=new JTextField(12);
tf4=new JTextField(12);
tf5=new JTextField(12);
tf6=new JTextField(12);
tf7=new JTextField(12);
tf8=new JTextField(12);
tf9=new JTextField(12);
tf10=new JTextField(12);
savebtn=new JButton(" Add ");
resetbtn=new JButton(" Reset");
editbtn1=new JButton(" Edit ");
editbtn2=new JButton(" Save");
deletebtn=new JButton("Delete");
p1.add(l1);
p1.add(tf1);
p1.add(l2);
p1.add(tf2);
p1.add(l3);
p1.add(tf3);
p1.add(l4);
p1.add(tf4);
p1.add(savebtn);
p1.add(resetbtn);

p2.add(l7);
p2.add(tf7);
p2.add(l8);
p2.add(tf8);
p2.add(l9);
p2.add(tf9);
p2.add(l10);
p2.add(tf10);
p2.add(editbtn1);
p2.add(editbtn2);

p3.add(l5);
p3.add(tf5);
p3.add(deletebtn);
resetbtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
tf1.setText("");
tf2.setText("");
tf3.setText("");
tf4.setText("");
}
});
savebtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
String value1=tf1.getText();
String value2=tf2.getText();
String value3=tf3.getText();
String value4=tf4.getText();
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";
String db = "test";
String driver = "com.mysql.jdbc.Driver";
String user = "root";
String pass = "root";
System.out.println(value1+value2+value3+value4);
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db, user, pass);
PreparedStatement st=con.prepareStatement("insert into employee(emp_id,emp_name,emp_address,salary) values(?,?,?,?)");
st.setString(1,value1);
st.setString(2,value2);
st.setString(3,value3);
st.setString(4,value4);
st.executeUpdate();
JOptionPane.showMessageDialog(p1,"Data is successfully inserted into database.");
con.close();
}
catch(Exception e){
JOptionPane.showMessageDialog(p1,"Error in submitting data!");
}
}
});

deletebtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){

String value1=tf5.getText();
Connection con = null;
         String url = "jdbc:mysql://localhost:3306/";
         String db = "test";
         String driver = "com.mysql.jdbc.Driver";
         String user = "root";
         String pass = "root";
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db, user, pass);
PreparedStatement st=con.prepareStatement("DELETE FROM employee WHERE emp_id = ?");
st.setString(1,value1);
st.executeUpdate();
JOptionPane.showMessageDialog(p3,"Record is deleted successfully.");
con.close();
}
catch(Exception exp3)
{
JOptionPane.showMessageDialog(p3,"Error in deleting record.");
}
}
});
editbtn1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){

String value=tf7.getText();
Connection con = null;
         String url = "jdbc:mysql://localhost:3306/";
         String db = "test";
         String driver = "com.mysql.jdbc.Driver";
         String user = "root";
         String pass = "root";
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db, user, pass);
PreparedStatement st=con.prepareStatement("select * from employee where emp_id=?");
st.setString(1,value);
ResultSet res=st.executeQuery();
res.next();
tf7.setText(Integer.toString(res.getInt(1)));
tf8.setText(res.getString(2));
tf9.setText(res.getString(3));
tf10.setText(Integer.toString(res.getInt(4)));
con.close();
}
catch(Exception e)
{
JOptionPane.showMessageDialog(p2,"Can not edit data");
}
}
});
editbtn2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
Connection con = null;
         String url = "jdbc:mysql://localhost:3306/";
         String db = "test";
         String driver = "com.mysql.jdbc.Driver";
         String user = "root";
         String pass = "root";
try
{
int x=JOptionPane.showConfirmDialog(p2,"Confirm edit? All data will be replaced");
if(x==0){
try{
String value1=tf7.getText();
String value2=tf8.getText();
String value3=tf9.getText();
String value4=tf10.getText();

Class.forName(driver);
con = DriverManager.getConnection(url+db, user, pass);;
Statement st=con.createStatement();
st.executeUpdate("update employee set emp_name='"+value2+"', emp_address='"+value3+"', salary='"+value4+"' where emp_id='"+value1+"'");
JOptionPane.showMessageDialog(p2,"Updated successfully");
con.close();
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(p2,"Error in updating edit fields");
}
}
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(p2,"Error");
}
}
});
}
void dis()
{
f.getContentPane().add(tp);
tp.addTab("Add Record",p1);
tp.addTab("Edit Record",p2);
tp.addTab("Delete Record",p3);

f.setSize(350,180);
f.setVisible(true);
f.setResizable(true);
}
public static void main(String z[]){
EmployeeInformation pro=new EmployeeInformation();
pro.dis();
}
}