java sql SQLException Missing IN or OUT parameter at index 1

Question

Using OJDBC 6, I created some Java 1.6-Oracle11g-JDBC code (below). I'm being given an exception:java.sql.SQLException: Missing IN or OUT parameter at index:: 1 . How can I stop this from happening and why?

My output is-

create CREATE TABLE employee(emp_name varchar(25),emp_address varchar(25))
insert INSERT INTO employee(jim,germany) values(?,?)
Exception: java.sql.SQLException: Missing IN or OUT parameter at index:: 1

The code is-

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;


public class Oracle {

public static void main(String[]args)
{

    try
    {

        Connection con = DriverManager.getConnection("jdbc:oracle:thin:@//localhost:1521/xe", "newman", "123456");
        Statement stmt = con.createStatement(); 

        String create = "CREATE TABLE employee(emp_name varchar(25),emp_address varchar(25))";
        System.out.println("create " + create);//
        stmt.execute(create);

        //insert 1st row            
        String inserting = "INSERT INTO employee(hans,germany) values(?,?)";
        System.out.println("insert " + inserting);//
        PreparedStatement ps = con.prepareStatement(inserting); 
        ps.executeUpdate();

        //insert 2nd row            
        inserting = "INSERT INTO employee(david,austria) values(?,?)";
        System.out.println("insert " + inserting);//
        ps = con.prepareStatement(inserting); 
        ps.executeUpdate();

    }catch(SQLException ex){System.out.println("Exception: " + ex);}


    }

}

To correct the code, I used:

//insert 1st row

        String inserting = "INSERT INTO 
                    employee(emp_name,emp_address) values(?,?)";
        PreparedStatement ps = con.prepareStatement(inserting);
        System.out.println("insert " + inserting);//
        ps.setString(1, "hans");
        ps.setString(2, "germany");
        ps.executeUpdate();

//insert 2nd row

        inserting = "INSERT INTO 
                    employee(emp_name,emp_address) values(?,?)";
        ps = con.prepareStatement(inserting);
        System.out.println("insert " + inserting);//
        ps.setString(1, "david");
        ps.setString(2, "austria"); 
        ps.executeUpdate();

Answer 1

This is not how SQL works:

INSERT INTO employee(hans,germany) values(?,?)

Column names (emp name, emp address) should be used with the values (hans, Germany). Your software uses the Statement to deliver the values. methods like setString(pos,value). The reason it is complaining is that you mentioned two parameters (the question marks), but you didn't offer values.

Make a PreparedStatement first, and then set the parameter values like in:

String insert= "INSERT INTO employee(emp_name,emp_address) values(?,?)";
PreparedStatement stmt = con.prepareStatement(insert);
stmt.setString(1,"hans");
stmt.setString(2,"germany");
stmt.execute();

I hope this helps you.