How to create an applet within an application?

Hi. Im trying to make an applet work within a main application but I cant get it to work because then I have 2 of these and it gives me an error:
public class java_tester extends JFrame implements MouseListener //MAIN APPLICATION
public class MusicPlay extends JApplet //APPLET
I cant have both if them because it is like two different programs.
Can anyone help me with this?
Thanks

ProGenius wrote:
But when I put public class MusicPlay extends JApplet it underlines it because the name of the main program is different and when I give it the same name it still underlines it. I know it probably is easy to do it but I really dont know how to make it work.
Thanks a lot for your helpWhat is "it", what is "it" underlining, and why is this a problem? There's no such concept as "main program". If you're confused by the presence of two whole classes, don't be. Anything beyond the laughably trivial will consist of several classes.

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