Given the following interfaces: public interface Inter1 { public abstract void m10%3; public abstract void m20; public interface Inter2 extends Inter1 { public abstract void m30; public interface Inter3 extends Inter1 { public abstract void m40; If you are asked to define a concrete class caller
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- Interface This lab is a small demonstration of how interfaces work. Type up the code and submit the results. CODE public class InterfaceExample { public static void main(String[] args) { DemoClass myObj = new DemoClass(); myObj.myMethod(); myObj.myOtherMethod(); } public interface InterfaceOne { public void myMethod(); // interface method } public interface Interface Two { public void myOtherMethod(); // interface method } public class DemoClass implements InterfaceOne, Interface Two { public void myMethod() { System.out.println("Some text.."); } public void myOtherMethod() { System.out.println("Some other text..."); }In Java, declaring a class abstract is useful ... When it doesn't make sense to have objects of that class. To prevent developers from further extending the class. When default implementations of some methods are not desirable. When it makes sense to have objects of that class.An enumeration can contain public constant variables O True O False An interface can extend as many interfaces as the programmer wants O True O False An abstract class must contain at least 1 abstract method O True False
- Design an interface named Colorable with a voidmethod named howToColor(). Every class of a colorable object must implementthe Colorable interface. Design a class named Square that extendsGeometricObject and implements Colorable. Implement howToColor todisplay the message Color all four sides. The Square class contains adata field side with getter and setter methods, and a constructor for constructinga Square with a specified side. The Square class has a private double datafield named side with its getter and setter methods. It has a no-arg constructorto create a Square with side 0, and another constructor that creates a Squarewith the specified side.Draw a UML diagram that involves Colorable, Square, and GeometricObject.Write a test program that creates an array of five GeometricObjects. For eachobject in the array, display its area and invoke its howToColor method if it iscolorable.Design a GUI for Book view class for the following Library Information System, which you have worked on 1 with the following details: Library Item Class Design and TestingDesign a class that holds the Library Item Information, with item name, author, publisher. Write appropriate accessor and mutator methods. Also, write a tester program that creates three instances/objects of the Library Items class. Extending Library Item Class (Library and Book Classes): Extend the Library Item class in (1) with a Book class with data attributes for a book’s title, author, publisher and an additional attributes as number of pages, and a Boolean data attribute indicating whether there is both hard copy as well as eBook version of the book. Demonstrate Book Class in a Tester Program with an object of Book class.// define the interface interface Measurable { public abstract double getArea(); } // create an abstract class shape abstract class Shape implements Measurable { String type; String name; // constructor of Shape class Shape(String name) { this.name = name; } // accessor for type public String getType() { return type; } // accessor for name public String name() { return name; } // setter for name public void setName(String name) { this.name = name; } // define toString method public String toString() { return (type + " : " + name); } } // define Rectangle class that extends Shape class class Rectangle extends Shape { double width; double height; Rectangle(String name, double width, double height) { super(name); this.type = "rectangle"; this.width = width; this.height = height; } public double getWidth() {…
- Q# A program that has no graphical user interface and only takes input through the command line only has a model and a controller. It does not have a view. The answer: is FALSE. Please explain with example. Q# What is NOT an effect of the SOLID principles? The answer: A high-level class depends on specific low-level classes and not interfaces. Please explain why. Q# Assume you are considering writing a method and are deciding what should happen when given input that is outside of perfect input. Which of the following is not a way to handle this? Answer: Use better JUnit testing. Subject: Java ProgrammingBecause a class may inherit from several interfaces, interfaces help establish stronger is-a connections. whether anything is real or fakeWrite a constructor for the IceCreamCup class. The constructor takes the name, and a List of Flavor s (name it fList) as parameters. It initializes the instance variables with the parameters. Use shallow copy for initializing the list of Flavor s. (Throw an IllegalArgumentException if the name is null, or the Flavor list is null or empty.) Note that successful instantiation should increase nCups by 1.
- please modify this: display method must call displayNormal Window class abstract class Window implements GUIComponent {private int height, width;private boolean isThisVisible, minimized; public Window(int width, int height){this.height = height;this.width = width;} public int getHeight() {return height; } public int getWidth() {return width; } public String toString() { return "a " + width + "x" + height + " minimal window"; }public void resize(int width, int height){this.width = width;this.height = height;}public void display() {if (!isThisVisible) {System.out.println("(Nothing to see here)");}else if (!minimized) { System.out.println(".......................\n:" + toString() + ":\n.......................");} else {System.out.println("[" + this.toString() + " (minimized)]");} }public void minimize(){ minimized = true;} public void setVisible(boolean isThisVisible) { this.isThisVisible = isThisVisible; }public void restore(){ minimized=false;} public boolean isVisible() { return…JavaPlease do it in JavaScript or C# 1) Design and implement the class structure for a drawing application. A drawing is made up of a canvas that contains a collection of three different shapes: circles, lines, and boxes. Each shape can be drawn by calling a Draw() method for that shape. The canvas class should also have a draw method that draws all of the shapes it contains. You don’t have to actually draw anything on a screen; you can simulate drawing by writing a message to the console.For example, the code snippet: canvas.Draw();Drawing a circle at...Drawing a line at...etc. (For each shape on the canvas) 2)(Bonus) Consider re-writing the above answer (#1) differently where the canvas does not contain the shapes, but is able to draw any of the three shapes passed to it. Re-design canvas.Draw() if you need to. Your main() program should ask for user input on what shape to draw. Ask once, draw, then exit.could produce something like the following output to the console: