Here is an example that retrieve the integer values from the database and stored in the integer variables. In addition to it, we have added numbers that are retrieved from the database.

import java.sql.*;

class RetrieveData 
{
    public static void main(String[] args) throws Exception{

        Class.forName("com.mysql.jdbc.Driver").newInstance();
        Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root" );
        Statement st=conn.createStatement();
        ResultSet rs=st.executeQuery("select * from numbers");
        while(rs.next()){
            int num1=rs.getInt("number1");
            int num2=rs.getInt("number2");
            int sum=num1+num2;

            System.out.println(num1+" +\t "+num2+" =\t "+sum);

        }
    }
}

thankyou sir

what do if we have to store the result of calculation into a new table of database?