Applet class provides a framework for applet execution,
defining methods that the system calls when milestones occur.
Milestones are major events in an applet's life cycle.
Most applets override some or all of these methods to respond
appropriately to milestones.
init method is useful for one-time initialization
that doesn't take very long. The
init method typically
contains the code that you would normally put into a constructor.
The reason applets don't usually have constructors is that they aren't
guaranteed to have a full environment until their
init method is called.
init method short so that your applet can load quickly.
Every applet that performs tasks after initialization
(except in direct response to user actions)
must override the
start method starts the execution of the applet.
It is good practice to return quickly from the
If you need to perform computationally intensive operations it might be
better to start a new thread
for this purpose.
Most applets that override the
start should also override the
stop method. The
stop method should suspend the
applet's execution, so that it doesn't take up system resources
when the user isn't viewing the applet's page. For example, an applet that
displays an animation should stop trying to draw the animation
when the user isn't viewing it.
Many applets don't need to override the
destroy method because
stop method (which is called before
will perform all tasks necessary to shut down the applet's execution.
destroy method is available
for applets that need to release additional resources.
destroymethod as short as possible, because there is no guarantee that this method will be completely executed. The Java Virtual Machine might exit before a long
destroymethod has completed.