Display values for multiple selection

Question

In the code below, I am trying to display multiple values for Drop down list. when i run the code below the value "AA" is only selected on the screen but not BB.
I want to display both AA and BB selected.
Please any help/suggestions:
<%@ page import="java.util.*"%>
<jsp:useBean id="ab" class="com.a.b" scope="session"/>
<select name="lstTyp" multiple>
<%
String Type[]= ab.getTyp();/*(VALUES ARE "AA-AA,BB-BB,CC-CC,DD-DD")*/
String choiceType;
String getTyp1 = "AA,BB";
String getTyp = "";
StringTokenizer parser = new StringTokenizer(getTyp1,",",false);     
          int numTokens = parser.countTokens();
          for(int j = 0; j <numTokens; j++)
               getTyp = parser.nextToken();
               for(int i=0; i<Type.length; i++)
               {   choiceType = Type[i].substring(3);
                    if( getTyp.equalsIgnoreCase(Type.substring(0,2)) )
                         out.println("<option value=\"" + Type[i].substring(0,2) + "\" SELECTED >"+ choiceType );
                    else
                         out.println("<option value=\"" + Type[i].substring(0,2) + "\">"+ choiceType );
               System.out.println(getTyp);
%>
</select>

Answer 1

<select name="lstTyp" size="5" multiple>