Those variables are declared by your editor and will probably be overwritten if you change something or add that component again because it can' t find the private version it declared earlier.
Normally the components on a form are controlled by the code within the form itself. This keeps it nice and clean.
This is much less clean and clear:
JProgressFrame.jLabel1.SetText("There is some progress...");
Compared to this:
JProgressFrame.SetProgressText("There is some progress...");
But if you really want to expose the components outside your form you should create a getter for each component.
Good luck!