Solving problems is a sense of accomplishment.

I am working on an agent-based Distributed Query System today. I have solved a problem for two hours. I hope you will not make the same mistakes as me in the future, I got a pointer to the interface class in the behavior class. Now I want to add a jlabel to a jpanel, but I can't add it all the time. I have never understood it and tried many methods, neither repaint () nor show
I made a simple example again. When setvisible (true) is not written, the added components will not be displayed. Do you want to use this method for every layout of the interface?
I'm so glad to have tried it.

Note that MSG. addreceiver (New Aid ("subcompany" + I, aid. islocalname ));

Do not add the same agent to receive the same message. data will be sent repeatedly.