How to get properties of a bean from another java class

Hi,
I am new to JSF. Currently I am facing a problem, and hope you experts can give me some guidance.
The JSF app i am working on has one Java class for handling a tree structure, MyTreeNode.java, and it also has a bean, NameBean.java, which has two properties, username and password.
I can easily associate an input text with the #{name.username} to store the user's login... but later on, I need to fetch that information inside of MyTreeNode.java. How do I do that? Thanks!
-- Jim

<managed-bean>
     <managed-bean-name>Person</managed-bean-name>
     <managed-bean-class>demo.PersonBean</managed-bean-class>
     <managed-bean-scope>session</managed-bean-scope>
     <managed-property>
          <property-name>bank</property-name>
          <property-class>demo.BankBean</property-class>
          <value>#{bank}</value>
     </managed-property>
<managed-bean>
<managed-bean>
     <managed-bean-name>bank</managed-bean-name>
     <managed-bean-class>demo.BankBean</managed-bean-class>
     <managed-bean-scope>session</managed-bean-scope>
<managed-bean>this version doesnt work for me.
does the single beans have to look any special?
some demo code out there?
thx!

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