Consider the following code: 1. public class Circle { private int radius; private int x; private int y; 2. 3. 4. 5. 6. public Circle(int r) { 7. 8. this.radius = r; 9. } public double getArea() { 10. 11. 12. 13. return Math.PI * radius *radius; 14. } 15. 16. 17. public String toString(int n) { return x+ " " + y + " " 18. + radius; 19. } 20. // The rest of the code for the Circle class //........ 21. 22. 23. } Assume that a Circle object c is already created with a radius of 12. What is the result of of the following statement: System.out.printIn(c); O A. This is a syntax error O B. 00 12 O C. The address of the Circle object OD. This is a run time error

Programming Logic & Design Comprehensive
9th Edition
ISBN:9781337669405
Author:FARRELL
Publisher:FARRELL
Chapter10: Object-oriented Programming
Section: Chapter Questions
Problem 16RQ
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### Understanding the Circle Class Code

Here we examine the provided code for a `Circle` class and explore the behavior when invoking a specific statement on an object of this class.

```java
public class Circle {
    private int radius;
    private int x;
    private int y;
    
    public Circle(int r) {
        this.radius = r;
    }
    
    public double getArea() {
        return Math.PI * radius * radius;
    }
    
    public String toString(int n) {
        return x + " " + y + " " + radius;
    }
    
    // The rest of the code for the Circle class
    // .......
}
```

#### Code Breakdown

1. **Class Declaration:**
    - `public class Circle {` (Line 1) declares a new class named `Circle`.

2. **Instance Variables:**
    - `private int radius;` (Line 2) defines a private instance variable `radius`.
    - `private int x;` (Line 3) defines a private instance variable `x`.
    - `private int y;` (Line 4) defines a private instance variable `y`.

3. **Constructor:**
    - `public Circle(int r) {` (Line 6) is the constructor that initializes the `radius` variable.
    - `this.radius = r;` (Line 8) assigns the value `r` to the instance variable `radius`.

4. **Method to Calculate Area:**
    - `public double getArea() {` (Line 11) declares a method to calculate the area of the circle.
    - `return Math.PI * radius * radius;` (Line 13) returns the calculated area using the formula \( \pi \times \text{radius}^2 \).

5. **toString Method:**
    - `public String toString(int n) {` (Line 17) declares a method that takes an integer parameter `n` (not used in the method) and returns a string.
    - `return x + " " + y + " " + radius;` (Line 18) returns a string representation of the `x`, `y`, and `radius` values.

6. **Placeholder for Additional Code:**
    - Comments (Lines 21–22) indicate that there may be additional code not shown here.

### Problem Statement:
Assume that a `Circle
Transcribed Image Text:### Understanding the Circle Class Code Here we examine the provided code for a `Circle` class and explore the behavior when invoking a specific statement on an object of this class. ```java public class Circle { private int radius; private int x; private int y; public Circle(int r) { this.radius = r; } public double getArea() { return Math.PI * radius * radius; } public String toString(int n) { return x + " " + y + " " + radius; } // The rest of the code for the Circle class // ....... } ``` #### Code Breakdown 1. **Class Declaration:** - `public class Circle {` (Line 1) declares a new class named `Circle`. 2. **Instance Variables:** - `private int radius;` (Line 2) defines a private instance variable `radius`. - `private int x;` (Line 3) defines a private instance variable `x`. - `private int y;` (Line 4) defines a private instance variable `y`. 3. **Constructor:** - `public Circle(int r) {` (Line 6) is the constructor that initializes the `radius` variable. - `this.radius = r;` (Line 8) assigns the value `r` to the instance variable `radius`. 4. **Method to Calculate Area:** - `public double getArea() {` (Line 11) declares a method to calculate the area of the circle. - `return Math.PI * radius * radius;` (Line 13) returns the calculated area using the formula \( \pi \times \text{radius}^2 \). 5. **toString Method:** - `public String toString(int n) {` (Line 17) declares a method that takes an integer parameter `n` (not used in the method) and returns a string. - `return x + " " + y + " " + radius;` (Line 18) returns a string representation of the `x`, `y`, and `radius` values. 6. **Placeholder for Additional Code:** - Comments (Lines 21–22) indicate that there may be additional code not shown here. ### Problem Statement: Assume that a `Circle
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