For most business models, are regarded as the most reliable method to measure visitor activity. Whereas a third-party cookie is usually set by an analytics vendor, (an entity with whom the user does not have a relationship), a is set by the business, an organization with whom the Web site visitor has specifically chosen to do business. Because of this relationship, are deemed more secure by the user.

Acolor class has three public, integer-returning accessor methods: getred, getgreen, and getblue, and three protected, void-returning mutator methods: setred, setgreen, setblue, each of which accepts an integer parameter and assigns it to the corresponding color component. the class, alphachannelcolor-- a subclass of color-- has an integer instance variable, alpha, containing the alpha channel value, representing the degree of transparency of the color. alphachannelcolor also has a method named dissolve (void-returning, and no parameters), that causes the color to fade a bit. it does this by incrementing (by 1) all three color components (using the above accessor and mutator methods) as well as the alpha component value. write the dissolve method.