Retrieve data from data base using java

import java.sql.*;
import java.util.Scanner;

class SelectTest
{
public static void main(String a[])throws Exception
{
   
    Scanner sc=new Scanner(System.in);
   
    Class.forName("oracle.jdbc.driver.OracleDriver");
    Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","krishna");
    Statement st=con.createStatement();
 
     ResultSet rs=st.executeQuery("select * from xyz2");
        while(rs.next())
            System.out.println(rs.getString(1)+"\t"+rs.getString(2));
           
                       
}
}