Create an interface MessageEncoder that has a single abstract method encode (plainText), where plainText is the message to be encoded. The method will return the encoded message.

Please answer question. This is pertaining to Java programming language 3-20

USING JAVA Write these: An interface called Shape that has two methods: area and perimeter. A class Rectangle that implements Shape and has a length and a width. A class Circle that implements Shape and has a radius. For each class, write the needed constructors, getters, setters, and a toString method that stringifies the instance variables in a readable format. Supply a test program that instantiates an instance of each class and exercises each method defined for the class.

Because a class may derive from a number of different interfaces, interfaces aid in the establishment of stronger is-a links. if anything is genuine or a fake

Java

Explain the difference between the following implementations of class A.a. extending class A from class Bb. extending class A from parent abstract class Cc. class A implementing interface D

Implement the following in the .NET Console App. Write the Bus class. A Bus has a length, a color, and a number of wheels.    a.    Implement data fields using auto-implemented Properies  b.    Include 3 constructors: default, the one that receives the Bus length, color and a number of wheels as input (utilize the Properties) and the Constructor that takes the Bus number (an integer) as input.

Which of the following cases is most like the strategy pattern? A. If you have an interface called Duck, and have many ducks that implement the duck interface. All of these ducks must have the behaviour “quack” but for some ducks, like a Mallard, this must result in a quack, where for a rubber duck it must result in a squeak. We decide to delegate the quack method to another interface, which can be implemented either in a concrete class that returns a quack or a concrete class that returns a squeak. B. If we have an interface called Duck. We need to give an object to a user that can quack like a duck. All we have is Turkeys. We create a special class that implements the duck interface, and to implement the quack method we simply call the turkey’s gobble method. C. None of these are like the strategy pattern. D. We have a large collection of Ducks. We want to look at them one by one and hear them quack. We write a piece of code that iterates through them all, and as we encounter…

Javascript Create an object, Gremlin, that extends the Monster interface and takes the same argument language. Gremlins inherits how a monster eats. Gremlins speaks differently. Gremlins replace each word in a sentence with its only known language, "gar". For example, if the sentence is "I like chicken", the speak() method will turn it into "gar gar gar". class Monster { constructor(language){ this.language = language; this.stomach = Array(); } // takes a food_item STRING and returns everything eaten so far ARRAY eat(food_item) { this.stomach.push(food_item); }   // takes in a sentence STRING and returns the passed in sentence STRING with no change speak(sentence) { returnsentence; }   }