In JAVA (jGRASP), I have to create a simple project that consists of creating a
ID: 3855339 • Letter: I
Question
In JAVA (jGRASP), I have to create a simple project that consists of creating a t.u.t.o.r.i.a.l for your classmates. I'm not sure how to start it but it will be about calculating the area of a circle using Circumference, Diameter and Radius. The program must include five major competencies of this course: 1. Explain the development of Java applications. 2. Explain the control structures in Java. 3. Utilize Methods and Arrays in Java. 4. Utilize string and character manipulation in Java. 5. Utilize Object-Oriented programming concepts in Java. Has to be in 2 parts. Written part explaining the operating instructions for the program and a working program to show classmates.
Explanation / Answer
Circle.java
public class Circle {
private double radius;
private double pi = 3.142;
public Circle(){
radius = 0.0;
}
public Circle(double radius){
this.radius = radius;
}
public double getRadius() {
return radius;
}
public void setRadius(double radius) {
this.radius = radius;
}
public double getArea(){
return pi * radius * radius;
}
public double getDiameter(){
return 2 * radius;
}
public double getCircumference(){
return 2 * pi * radius;
}
}
CircleTest.java
import java.util.Scanner;
public class CircleTest {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
System.out.println("Enter the circle radius: ");
double radius = scan.nextDouble();
Circle c = new Circle(radius);
System.out.println("Circle area: "+c.getArea());
System.out.println("Circle diameter: "+c.getDiameter());
System.out.println("Circle circumference: "+c.getCircumference());
}
}
Output:
Enter the circle radius:
5
Circle area: 78.55
Circle diameter: 10.0
Circle circumference: 31.419999999999998
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