Your company is doing some data cleanup, and notices that the email list of all users has been getting outdated. For one, there are some users with repeat email addresses, and some of the email accounts no longer exist. Your job is to create a series of methods that can purge some of the old data from the existing email list.

Create static methods in the DataPurge class that can do the following:

Test your methods out in the DataPurgeTester file. You don’t have to change anything there, but the methods should work accordingly!

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.