Retrieve Data from Database.

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("select * from demo");

ResultSet rs=pst.executeQuery();

while(rs.next())

{

  int id = rs.getInt(1);
  String name = rs.getString(2);
  String mail = rs.getString(3);
  String address = rs.getString(4);
           
  System.out.println(id + "\t" + name +
                               "\t" + mail + "\t" + address );

}

con.close();

pst.close();

}

catch(Exception e)

{

System.out.println(e);

}

}

}