If I create a new strategy in Java, IUserInterface supports a function

JPanel    getBottomTab(String key) 

It returns a tab by unique key which is displayses in the bottom pane and can be detached.
If I do so and detache this tab, how can I put this window durably to top?
Something like

JFrame jf = (JFrame) panel.getParent();
jf.setAlwaysOnTop(true);

does not work. Why?

Even if I open a new JFrame in JForex, this function "setAlwaysOnTop(true);" does not work. JForex creates an Applet Window, which cannot be controlled by "setAlwaysOnTop(true);". Why?

You can't.
Because other bottom tabs, such as "Orders", "Positions", etc. should be accessible to.
In your case, we recommend you to use a JDialog. Create your own dialog, where you can put all your necessary components without any limitations.