We've got the experts to help. I don't understand what the applet constructor is. To write an applet, you must first subclass the Applet class. Because the applet constructor is just like any other constructor, it cannot be overridden.
Constructors perform any necessary initialization for the new object.
Remember, you can only override methods, not constructors. The browser or applet viewer automatically calls it to perform applet initialization each time the applet is loaded. For example, let's say you want to perform applet image loading inside of an applet constructor. To sum up, an applet constructor is the constructor of the applet, which has been subclassed from the Applet class. Moreover, this constructor can not be overridden.