With the help of IDE integration: use the "Profile" action from within your IDE, like you do "Run" or "Debug".

You can profile applets running inside a browser with Java Plugin installed.

Please add -agentpath:<agent library path> option (see detail in Enabling profiling manually) in "Java(TM) Plug-in Control Panel", on the "Advanced" tab, in the field "Java Runtime Parameters".

On Windows, "Java(TM) Plug-in Control Panel" is accessible from the Windows "Control Panel"

Important: If the browser is running, you must restart it after you have made the changes.

You can profile applets started with appletviewer command by passing -J-agentpath:<agent library path> (see Enabling profiling manually) as a command line parameter.