<p>The Facebook Class</p><p>Create a class called, Facebook, and define a field calledusers. Define the users field as a</p><p>List<FacebookUser> and instantiate the list as anArrayList in the constructor.</p><p>public Facebook() {</p><p>users =
<p>Main topics: User validated input<br/>Basic String Methods<br/>if & if - else Statements<br/>Loop Statements</p><p>Program Specication:<br/>Write a Java program that emulates a simple calculator:<br/>Declare and initialize a String variable (bitstring) to ""<br/>Declare