Update Data.

import  java.sql.*;

import java.util.*;

Class insert

{

public static void main(String args[])

{

try

{

Scanner scan=new Scanner(System.in);

System.out.println("Enter the id:-");

int id=scan.nextInt();

System.out.println("Enter Ur Name:-");

String name=scan.next();

System.out.println("Enter Ur Address:-");

String add=scan.next();

System.out.println("Enter Ur Mail:-");

String mail=scan.next();

Class.forName("com.mysql.jdbc.Driver");

Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/Databasename","username","password");

PreparedStatement pst=con.prepareStatement("update demo set name=?,mail=?,address=? where id=?");

pst.setString(1,name);

pst.setString(2,mail);

pst.setString(3,add);
pst.setInt(4,id);

pst.executeUpdate();

con.close();

pst.close();

}

catch(Exception e)

{

System.out.println(e);

}

}

}