Netbeans platform simple window communication

I'm currently using the Netbeans platform and can't seem to get one TopComponent to communicate with another. My research has pointed me in the direction of using Lookups however I can't seem to access my function.

I have one TopComponent called AppleTopComponent, which has a method called myName() and I want to call it from my OrangeTopComponent开发者_开发知识库, which is called within a button handler, inside that handler I have the following code.

TopComponent tc = WindowManager.getDefault().findTopComponent("AppleTopComponent");
Lookup tcLookup = tc.getLookup();
tcLookip.myName();

Surely this should be a simple process, what is it I'm doing wrong.

Many thanks, Alex

This should do what you're looking for.

    TopComponent tc = WindowManager.getDefault().findTopComponent("AppleTopComponent");
    AppleTopComponent atc = (AppleTopComponent) tc;
    jLabel1.setText(atc.myName());