this is my java coding

Java Code:
package user;

/**
 * Created by abansari
 * User: Administrator
 * Date: Nov 30, 2009
 * Time: 2:59:48 PM
 
 */
public class UserData {
      private long value1;
      private long value2;
      private char op;
      private long result;

    UserData()
    {
        value1 = 0;
        value2 = 0;
        op = '+';
        result = 0;       
    }
    void setFirstValue(long newValue)
    {
       value1 = value1 + newValue;
    }
    void setSecValue(long newValue)
    {
        value2 = value2 + newValue;
    }
    long getFirstValue()
    {
        return value1;
    }
    long getSecValue()
    {
        return value2;
    }     

}
this is my jsp page coding.

Java Code:
<%@ page import="user.UserData" %>
<%--
  Created by IntelliJ IDEA.
  User: abansari
  Date: Dec 5, 2009
  Time: 2:39:02 PM
  
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
      <title>Calculator</title>

  </head>
  <body>
      <%
          // these lines for test purpose only //
          long value1;
          long value2;
          char op;
          long result;
          value1 = 1;
          value2 = 2;
          result = value1 + value2;
          // test purpose lines end //
    
      %>
      <table border="1px">
          <form name="Calc" method="post" action="">
          <tr>
              <td colspan="4">
                  <input type="text" name="textbox" value="<%=result%>">
              </td>
          </tr>
          <tr>
              <td>
                  <input type="button" name="1" value="1" onclick="var value1 = this.value">
              </td>
              <td>
                  <input type="button" name="2" value="2">
              </td>
              <td>
                  <input type="button" name="3" value="3">
              </td>
               <td>
                  <input type="button" name="divide" value="/">
              </td>
          </tr>
          <tr>
              <td>
                  <input type="button" name="4" value="4">
              </td>
              <td>
                  <input type="button" name="5" value="5">
              </td>
              <td>
                  <input type="button" name="6" value="6">
              </td>
              <td>
                  <input type="button" name="minus" value="-">
              </td>
          </tr>
          <tr>
              <td>
                  <input type="button" name="7" value="7">
              </td>
              <td>
                  <input type="button" name="8" value="8">
              </td>
              <td>
                  <input type="button" name="9" value="9">
              </td>
              <td>
                  <input type="button" name="multiply" value="*">
              </td>
          </tr>
          <tr>
              <td>
                  <input type="button" name="dot" value=".">
              </td>
              <td>
                  <input type="button" name="0" value="0">
              </td>
              <td>
                  <input type="submit" name="equal" value="=">
              </td>
              <td>
                  <input type="button" name="plus" value="+">
              </td>
          </tr>

          </form>          
      </table>

  </body>
</html>
my problem is now how to call java class is in jsp file?

thanks