In .java add elements to .jsp

Question

Hello!
I'm just beginning and can't understand one thing:
When I create JSPDynPage, system create JSP and JAVA file - it's clear. Then I add elements to form in JSP, for example, Layout.
Can I add, for example, row into that Layout in .java file?
    .JSP:
<hbj:form>
         <hbj:formLayout
             id="myLayout"
             width="100%">
             <hbj:formLayoutRow
                     id="Row1">
                     <hbj:formLayoutCell
                             id="Cell11"
                             align="LEFT"
                             width="100%">                
                             <hbj:textView
                                 id="welcome_message"
                                 text="May the force be with you unknown user"
                                 design="HEADER1" />
                       </hbj:formLayoutCell>
               </hbj:formLayoutRow>                      
           </hbj:formLayout>            
    </hbj:form>
.JAVA:
public void doProcessBeforeOutput() throws PageException {
         this.setJspName("myjsp.jsp");
      Form Reg_Form = null;
      FormLayout RF_All  = new FormLayout();
      Tray Left_Tray1 = new Tray("TrayRules1");
       Reg_Form = (Form)this.getForm();
       RF_All = (FormLayout) this.getComponentByName("myLayout");
       for (int i = 1; i <= 3; i++ ) {     RF_All.addRow(); }
       Left_Tray1.setTitle("Sample Title");
       Left_Tray1.setWidth("100%");
       TextView Left_Tray1_text = new TextView("Left_Tray1_text");
       Left_Tray1_text.setText("Sample Text");
       Left_Tray1_text.setEncode(false);
       Left_Tray1_text.setWrapping(true);
       Left_Tray1.addComponent(Left_Tray1_text);
       RF_All.addComponent(2,1, Left_Tray1);
       Reg_Form.addComponent(RF_All);
That code don't display Tray in page...

Answer 1

Paul,
I suggest you  not to add the your business logic in that auto generated file.
Instead you can have seperate java file or any Bean.
Since you are writing the logic for layout you can add the code in the jsp file
itself.
If you are using HTMLB Then keep the auto generated code in the jsp otherwise remove the code and keep the file as jsp meaning you use the html, javascript,
jsp code in the .jsp file itself.
you can add the java code in the jsp
<% String strName = "SAP"; %>
<sc ript>
al ert("<%=strName%>");
</sc ript>
Ram