Body Lotion

Pre-requisite : Framework has master class file where we have initialize webDriver, properties file, JavaScriptExecutor.
Here also we have written our own click & sendKeys method.
Inheritance : When any of test case class extends master class page we have achieved inheritance
Encapsulation : We normally achieve encapsulation when we write any class which has variable and method since encapsulation is a binding of data/variables & methods in a single unit
Interface : When we write webDriver driver = new FirefoxDriver(); Here we have used interface since webDriver is an interface