What is the best response to cyberbullying?

Umnica [9.8K]

A-artificial I-intelligent

5 0

2 years ago

4. Write an interface ObjectWithTwoParameters which has a method specification: double area (double d1, double d2) which returns

il63 [147K]

Answer:

The java program for the given scenario is as follows.

import java.util.*;

//interface with method area

interface ObjectWithTwoParameters

{

double area (double d1, double d2);

}

class RectangleClass implements ObjectWithTwoParameters

{

//overriding area()

public double area (double d1, double d2)

{

return d1*d2;

}

class TriangleClass implements ObjectWithTwoParameters

{

//overriding area()

public double area (double d1, double d2)

{

return (d1*d2)/2;

}

class CylinderClass implements ObjectWithTwoParameters

{

public double area (double d1, double d2)

{

return ( 2*3.14*d1*d1 + d2*(2*3.14*d1) );

}

public class Test

{

public static void main(String[] args)

{

//area displayed for all three shapes

ObjectWithTwoParameters r = new RectangleClass();

double arear = r.area(2, 3);

System.out.println("Area of rectangle: "+arear);

ObjectWithTwoParameters t = new TriangleClass();

double areat = t.area(4,5);

System.out.println("Area of triangle: "+areat);

ObjectWithTwoParameters c = new CylinderClass();

double areac = c.area(6,7);

System.out.println("Area of cylinder: "+areac);

}

OUTPUT

Area of rectangle: 6.0

Area of triangle: 10.0

Area of cylinder: 489.84

Explanation:

1. The program fulfils all the mentioned requirements.

2. The program contains one interface, ObjectWithTwoParameters, three classes which implement that interface, RectangleClass, TriangleClass and CylinderClass, and one demo class, Test, containing the main method.

3. The method in the interface has no access specifier.

4. The overridden methods in the three classes have public access specifier.

5. No additional variables have been declared.

6. The test class having the main() method is declared public.

7. The area of the rectangle, triangle and the cylinder have been computed as per the respective formulae.

8. The interface is similar to a class which can have only declarations of both, variables and methods. No method can be defined inside an interface.

9. The other classes use the methods of the interface by implementing the interface using the keyword, implements.

10. The object is created using the name of the interface as shown.

ObjectWithTwoParameters r = new RectangleClass();

8 0

3 years ago

How would you write this using Java: Use a TextField's setText method to set value 0 or 1 as a string?

katrin [286]

Answer:

Explanation:

The following Java code uses JavaFX to create a canvas in order to fit the 10x10 matrix and then automatically and randomly populates it with 0's and 1's using the setText method to set the values as a String

import javafx.application.Application;

import javafx.scene.Scene;

import javafx.scene.control.TextField;

import javafx.scene.layout.GridPane;

import javafx.stage.Stage;

public class Main extends Application {

private static final int canvasHEIGHT = 300;

private static final int canvasWIDTH = 300;

public void start(Stage primaryStage) {

GridPane pane = new GridPane();

for (int i = 0; i < 10; i++) {

for (int j = 0; j < 10; j++) {

TextField text = new TextField();

text.setText(Integer.toString((int)(Math.random() * 2)));

text.setMinWidth(canvasWIDTH / 10.0);

text.setMaxWidth(canvasWIDTH / 10.0);

text.setMinHeight(canvasHEIGHT / 10.0);

text.setMaxHeight(canvasHEIGHT / 10.0);

pane.add(text, j, i);

}

Scene scene = new Scene(pane, canvasWIDTH, canvasHEIGHT);

primaryStage.setScene(scene);

primaryStage.setMinWidth(canvasWIDTH);

primaryStage.setMinHeight(canvasHEIGHT);

primaryStage.setTitle("10 by 10 matrix");

primaryStage.show();

}

public static void main(String[] args) {

Application.launch(args);

}

3 0

3 years ago

In GamePoints' constructor, assign teamWhales with 500 and teamLions with 500. #include using namespace std; class GamePoints {

xxMikexx [17]

Answer:

Here is the GamePoints constructor:

GamePoints::GamePoints() :

/* Your code goes here */

{

teamLions = 500;

teamDolphins = 500;

}

Explanation:

Here is the complete program:

#include //to use input output functions

using namespace std; //to identify objects like cin cout

class GamePoints { //class GamePoints

public: GamePoints(); // constructor of GamePoints class

void Start() const; //method of GamePoints class

private: //declare data members of GamePoints class

int teamDolphins; // integer type private member variable of GamePoints

int teamLions; }; // integer type private member variable of GamePoints

GamePoints::GamePoints() //constructor

{ teamLions = (500), teamDolphins= (500); } //assigns 500 to the data members of teamLions and teamDolphins of GamePoints class

void GamePoints::Start() const { //method Start of classs GamePoints

cout << "Game started: Dolphins " << teamDolphins << " - " << teamLions << " Lions" << endl; } //displays the values of teamDolphins and teamLions i.e. 500 assigned by the constructor

int main() //start of main() function

{ GamePoints myGame; // creates an object of GamePoints class

myGame.Start(); //calls Start method of GamePoints class using the object

return 0; }

The output of the program is:

Game started: Dolphins 500 - 500 Lions

8 0

3 years ago

Define a class named ComparableSquare that extends Square (defined above) and implements Comparable. Implement the compareTo met

Alexxx [7]

Answer:

/*********************************************************************************

* (The ComparableCircle class) Define a class named ComparableCircle that *

* extends Circle and implements Comparable. Draw the UML diagram and implement *

* the compareTo method to compare the circles on the basis of area. Write a test *

* class to find the larger of two instances of ComparableCircle objects. *

*********************************************************************************/

public class Exercise_13_06 {

/** Main method */

public static void main(String[] args) {

// Create two instances of ComparableCircle objects

ComparableCircle comparableCircle1 = new ComparableCircle(12.5);

ComparableCircle comparableCircle2 = new ComparableCircle(18.3);

// Display comparableCircles

System.out.println("\nComparableCircle1:");

System.out.println(comparableCircle1);

System.out.println("\nComparableCircle2:");

System.out.println(comparableCircle2);

// Find and display the larger of the two ComparableCircle objects

System.out.println((comparableCircle1.compareTo(comparableCircle2) == 1

? "\nComparableCircle1 " : "\nComparableCircle2 ") +

"is the larger of the two Circles");

}

3 0

3 years ago