Error passing Integer to a bean

Question

Hello,
I have two JSP's Students.jsp and People.jsp. Students displays the list of only people who have the role of student whereas People displays a list of all people in the db.
Currently, I am referencing com.project.train.People bean and calling the viewPeople() method to get a list of people, and the viewStudents() method to get a list of Students. (see code below) This code works well, but it is basically just redundant code. If I want to get a list of people with any other role, the code will be duplicated again.
What I would like to do is to change this to only call the viewPeople() method passing the integer of the role ID to use in the WHERE clause of the SQL (Prepared)Statement (like ...WHERE ROLE_ID = ?). Of course, if I only want to get all of the people, I could pass "null" and get a full list.
My problem is that when I do this and try calling the viewPeople method, whether or not I pass a value to the method, I get a variation on the following error:
C:\Tomcat 4.1\work\Standalone\localhost\ISupport\Students_jsp.java:97: viewPeople(java.lang.Integer) in com.project.common.People cannot be applied to (int)
     ResultSet rs = student.viewPeople(1);
---------------------^
Many thanks in advance for your help.
James.
com.project.train.People:
package com.project.train;
import java.sql.*;
import java.util.*;
public class People extends Object implements java.io.Serializable {
String error;
Connection con;
public void connect(){
<connect to db...>
public void disconnect(){
<disconnect from db...>
public ResultSet viewStudents() throws SQLException, Exception{
ResultSet rs = null;
try{
String queryString = ("<SQL to get only students from db>:");
Statement stmt = con.createStatement();
rs = stmt.executeQuery(queryString);
} catch (SQLException sqle) {
<handle it>
} catch (Exception e) {
<handle it>
return rs;
public ResultSet viewPeople() throws SQLException, Exception{
ResultSet rs = null;
try{
String queryString = ("<SQL to get all people from db>:");
Statement stmt = con.createStatement();
rs = stmt.executeQuery(queryString);
} catch (SQLException sqle) {
<handle it>
} catch (Exception e) {
<handle it>
return rs;
Proposed code for new viewPeople method:
public ResultSet viewPeople(Integer intRoleID) throws SQLException, Exception{
ResultSet rs = null;
PreparedStatement psQuery;
try{
if (!(intRoleID == null)){
psQuery = con.prepareStatement("SELECT <...> where role_id = ?");
psQuery.setString(1, intRoleID.toString());
}else{
psQuery = con.prepareStatement("SELECT * FROM People");
rs = psQuery.executeQuery();
} catch (SQLException sqle) {
<handle it>
} catch (Exception e) {
<handle it>
return rs;

Answer 1

In the class named Students_jsp.java, your code is...
ResultSet rs = student.viewPeople(1);
But you have defined viewPeople() to take an argument of type Integer. 1 is an int, not an Integer. This should cure that problem.
ResultSet rs = student.viewPeople(new Integer(1));