Question

I am trying to write a Geometry.java program but Dr.Java is giving me errors and I dont know what I am doing wrong.

import java.util.Scanner;

/**
This program demonstrates static methods
*/

public class Geometry
{
public static void main(String[] args)
{
int choice; // The user's choice
double value = 0; // The method's return value
char letter; // The user's Y or N decision
double radius; // The radius of the circle
double length; // The length of the rectangle
double width; // The width of the rectangle
double height; // The height of the triangle
double base; // The base of the triangle
double side1; // The first side of the triangle
double side2; // The second side of the triangle
double side3; // The third side of the triangle

// Create a scanner object to read from the keyboard
Scanner keyboard = new Scanner(System.in);
  
// The do loop allows the menu to be displayed first
do
{
// TASK #1 Call the printMenu method
printMenu();
choice = keyboard.nextInt();

switch(choice)
{
case 1:
System.out.print("Enter the radius of " +
"the circle: ");
radius = keyboard.nextDouble();

// TASK #3 Call the circleArea method and
// store the result in the value variable

value=cirArea(radius);
System.out.println("The area of the " +
"circle is " + value);
break;
case 2:
System.out.print("Enter the length of " +
"the rectangle: ");
length = keyboard.nextDouble();
System.out.print("Enter the width of " +
"the rectangle: ");
width = keyboard.nextDouble();

// TASK #3 Call the rectangleArea method and
// store the result in the value variable
value=recArea(length, width);
System.out.println("The area of the " +
"rectangle is " + value);
break;
case 3:
System.out.print("Enter the height of " +
"the triangle: ");
height = keyboard.nextDouble();
System.out.print("Enter the base of " +
"the triangle: ");
base = keyboard.nextDouble();

// TASK #3 Call the triangleArea method and
// store the result in the value variable
value=triArea(base,height);
System.out.println("The area of the " +
"triangle is " + value);
break;
case 4:
System.out.print("Enter the radius of " +
"the circle: ");
radius = keyboard.nextDouble();

// TASK #3 Call the circumference method and
// store the result in the value variable
value= cirCircumference(radius);
System.out.println("The circumference " +
"of the circle is " +
value);
break;
case 5:
System.out.print("Enter the length of " +
"the rectangle: ");
length = keyboard.nextDouble();
System.out.print("Enter the width of " +
"the rectangle: ");
width = keyboard.nextDouble();

// TASK #3 Call the perimeter method and
// store the result in the value variable
value=recPerimeter(length,width);
System.out.println("The perimeter of " +
"the rectangle is " +
value);
break;
case 6:
System.out.print("Enter the length of " +
"side 1 of the " +
"triangle: ");
side1 = keyboard.nextDouble();
System.out.print("Enter the length of " +
"side 2 of the " +
"triangle: ");
side2 = keyboard.nextDouble();
System.out.print("Enter the length of " +
"side 3 of the " +
"triangle: ");
side3 = keyboard.nextDouble();

// TASK #3 Call the perimeter method and
// store the result in the value variable
value=triPerimeter(side1,side2,side3);
System.out.println("The perimeter of " +
"the triangle is " +
value);
break;
default:
System.out.println("You did not enter " +
"a valid choice.");
}
keyboard.nextLine(); // Consume the new line

System.out.println("Do you want to exit " +
"the program (Y/N)?: ");
String answer = keyboard.nextLine();
letter = answer.charAt(0);

} while(letter != 'Y' && letter != 'y');
}

// TASK #1 Create the printMenu method here
public static void printMenu(){
System.out.println("This is a geometry calculator");
System.out.println("Choose what you would like to calculate");
System.out.println("1. Find the area of a circle");
System.out.println("2. Find the area of a rectangle");
System.out.println("3.Find the area of a triangle");
System.out.println("4. Find the circumference of a circle");
System.out.println("5. Find the perimeter of a rectangle");
System.out.println("6. Find the perimeter of a triangle Enter the number of your choice:");

// TASK #2 Create the value-returning methods here
/**
*
*
*
*/
public static double cirArea(double radius)
{
return Math.Pi*radius*radius;

}
/**
*
*
*
*/
public static double recArea(double length,double width){
return lenght*width;
}
/**
*
*
*
*/
public static double triArea(double base,double height){

return 0.5*base*height;
  
}
/**
*
*
*
*/
public static double cirCircumference(double radius){
return 2*Math.Pi*radius;
  
}

/**
*
*
*/
public static double recPerimeter(double length,double width){
return 2*(length+width);
  
}
/**
*
*
*/
public static double triPerimeter(double side1,double side2,double side3);
{
return side1+side2+side3;
  
}

  

// TASK #4 Write javadoc comments for each method
}
}

Answer 1

import java.util.Scanner;

public class Geometry {

public static void main(String[] args) {

int choice; // The user's choice

double value = 0; // The method's return value

char letter; // The user's Y or N decision

double radius; // The radius of the circle

double length; // The length of the rectangle

double width; // The width of the rectangle

double height; // The height of the triangle

double base; // The base of the triangle

double side1; // The first side of the triangle

double side2; // The second side of the triangle

double side3; // The third side of the triangle

// Create a scanner object to read from the keyboard

Scanner keyboard = new Scanner(System.in);

// The do loop allows the menu to be displayed first

do {

// TASK #1 Call the printMenu method

printMenu();

choice = keyboard.nextInt();

switch (choice) {

case 1:

System.out.print("Enter the radius of " + "the circle: ");

radius = keyboard.nextDouble();

// TASK #3 Call the circleArea method and

// store the result in the value variable

value = cirArea(radius);

System.out.println("The area of the " + "circle is " + value);

break;

case 2:

System.out.print("Enter the length of " + "the rectangle: ");

length = keyboard.nextDouble();

System.out.print("Enter the width of " + "the rectangle: ");

width = keyboard.nextDouble();

// TASK #3 Call the rectangleArea method and

// store the result in the value variable

value = recArea(length, width);

System.out.println("The area of the " + "rectangle is " + value);

break;

case 3:

System.out.print("Enter the height of " + "the triangle: ");

height = keyboard.nextDouble();

System.out.print("Enter the base of " + "the triangle: ");

base = keyboard.nextDouble();

// TASK #3 Call the triangleArea method and

// store the result in the value variable

value = triArea(base, height);

System.out.println("The area of the " + "triangle is " + value);

break;

case 4:

System.out.print("Enter the radius of " + "the circle: ");

radius = keyboard.nextDouble();

// TASK #3 Call the circumference method and

// store the result in the value variable

value = cirCircumference(radius);

System.out.println("The circumference " + "of the circle is " + value);

break;

case 5:

System.out.print("Enter the length of " + "the rectangle: ");

length = keyboard.nextDouble();

System.out.print("Enter the width of " + "the rectangle: ");

width = keyboard.nextDouble();

// TASK #3 Call the perimeter method and

// store the result in the value variable

value = recPerimeter(length, width);

System.out.println("The perimeter of " + "the rectangle is " + value);

break;

case 6:

System.out.print("Enter the length of " + "side 1 of the " + "triangle: ");

side1 = keyboard.nextDouble();

System.out.print("Enter the length of " + "side 2 of the " + "triangle: ");

side2 = keyboard.nextDouble();

System.out.print("Enter the length of " + "side 3 of the " + "triangle: ");

side3 = keyboard.nextDouble();

// TASK #3 Call the perimeter method and

// store the result in the value variable

value = triPerimeter(side1, side2, side3);

System.out.println("The perimeter of " + "the triangle is " + value);

break;

default:

System.out.println("You did not enter " + "a valid choice.");

}

keyboard.nextLine(); // Consume the new line

System.out.println("Do you want to exit " + "the program (Y/N)?: ");

String answer = keyboard.nextLine();

letter = answer.charAt(0);

} while (letter != 'Y' && letter != 'y');

}

// TASK #1 Create the printMenu method here

public static void printMenu() {

System.out.println("This is a geometry calculator");

System.out.println("Choose what you would like to calculate");

System.out.println("1. Find the area of a circle");

System.out.println("2. Find the area of a rectangle");

System.out.println("3.Find the area of a triangle");

System.out.println("4. Find the circumference of a circle");

System.out.println("5. Find the perimeter of a rectangle");

System.out.println("6. Find the perimeter of a triangle Enter the number of your choice:");

}

// TASK #2 Create the value-returning methods here

/**

*

*

*

*/

public static double cirArea(double radius) {

return Math.PI * radius * radius;

}

/**

*

*

*

*/

public static double recArea(double length, double width) {

return length * width;

}

/**

*

*

*

*/

public static double triArea(double base, double height) {

return 0.5 * base * height;

}

/**

*

*

*

*/

public static double cirCircumference(double r) {

return 2 * Math.PI * r;

}

/**

*

*

*/

public static double recPerimeter(double length, double width) {

return 2 * (length + width);

}

/**

*

*

*/

public static double triPerimeter(double side1, double side2, double side3) {

return side1 + side2 + side3;

}

// TASK #4 Write javadoc comments for each method

}

$terminated> Geometry Uava Application] CAProgram FilesJavaire1.8.0_144\binjavaw.exe (Nov 2, 2018, 8:51:04 AM) This is a geometry calculator Choose what you would like to calculate 1. Find the area of a circle 2. Find the area of a rectangle 3.Find the area of a triangle 4. Find the circumference of a circle 5. Find the perimeter of a rectangle 6. Find the perimeter of a triangle Enter the number of your choice: Enter the radius of the circle: 4 The area of the circle is 50.26548245743669 Do you want to exit the program (Y/N)?:$