The program should be named: xxxx_Lab8.java (XXXX Is your email ID). 2. Implement the necessary methods for each class. 3. The test class xxxxx_Lab8 should have a main() method that will call three methods: readData(), sort(), report(). 4. readData() method will take 3 input records from keyboard, the input format is shown as below: color radius_or_width type (fields are separated by spaces) For example: 1. blue 10 circle yellow 5.5 square red 5 circle 5. Use a Shape8 array to hold these objects. If the type is circle, create a Circle8 object to hold the data. If the type is square, create a Square8 object to hold the data. 6. sort() method will sort the three objects' areas from low to high. 7. report() method will print the sorted objects with the following information: a. color, area and radius for circle object. b. color, area, width, and diagonal for square object. 8. The above test data should have the following output: Color: yellow, Area: 30.25, Width: 5.5, Diagonal: 7.7781745930520225 Color: red, Area: 78.53981633974483, Radius: 5.0 Color: blue, Area: 314.1592653589793, Radius: 10.0

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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### Java Program Design

**Objective**: Write a Java program to implement the following requirements:

1. Design three classes: `Shape8`, `Circle8`, `Square8` and one interface `ComputeData`.
2. `Shape8` is an abstract class.
3. `ComputeData` is an interface.
4. Italicized methods signify abstract methods.

---

#### Class Diagram

1. **Shape8 (Abstract Class)**

    - **Attributes**:
        - `color`: String
        - `area`: double

    - **Methods**:
        - `Shape8(String color)`: Constructor
        - *`getArea()`: double* (Abstract method)
        - `setArea(area: double): void`
        - `getColor(): String`
        - `compareTo(o: Shape8): int`
        - `toString(): String`

2. **ComputeData (Interface)**

    - **Methods**:
        - `getDiagonal(): double`
 
    - **Note**: 
        - Diagonal is calculated as `Math.sqrt(width*width*2)`

3. **Circle8 (Subclass of Shape8)**
    
    - **Attributes**:
        - `radius`: double

    - **Methods**:
        - `Circle8(color: String, radius: double)`: Constructor
        - `toString(): String`
        - …necessary methods not detailed here

    - **Note**: 
        - Area calculation formula: `area = radius * radius * Math.PI`

4. **Square8 (Subclass of Shape8, Implements ComputeData)**

    - **Attributes**:
        - `width`: double

    - **Methods**:
        - `Square8(color: String, width: double)`: Constructor
        - `toString(): String`
        - …necessary methods not detailed here

    - **Note**:
        - Area calculation formula: `area = width * width`

In the provided design, `Circle8` and `Square8` classes extend the `Shape8` class, inheriting its attributes and functionality, while `Square8` also implements the `ComputeData` interface, providing specific implementations for calculating the diagonal. The abstract `getArea()` method must be implemented in the subclasses, ensuring that each shape type handles area calculation appropriately. The `compareTo` method is intended for comparing shape objects, possibly by their area or other attributes.
Transcribed Image Text:### Java Program Design **Objective**: Write a Java program to implement the following requirements: 1. Design three classes: `Shape8`, `Circle8`, `Square8` and one interface `ComputeData`. 2. `Shape8` is an abstract class. 3. `ComputeData` is an interface. 4. Italicized methods signify abstract methods. --- #### Class Diagram 1. **Shape8 (Abstract Class)** - **Attributes**: - `color`: String - `area`: double - **Methods**: - `Shape8(String color)`: Constructor - *`getArea()`: double* (Abstract method) - `setArea(area: double): void` - `getColor(): String` - `compareTo(o: Shape8): int` - `toString(): String` 2. **ComputeData (Interface)** - **Methods**: - `getDiagonal(): double` - **Note**: - Diagonal is calculated as `Math.sqrt(width*width*2)` 3. **Circle8 (Subclass of Shape8)** - **Attributes**: - `radius`: double - **Methods**: - `Circle8(color: String, radius: double)`: Constructor - `toString(): String` - …necessary methods not detailed here - **Note**: - Area calculation formula: `area = radius * radius * Math.PI` 4. **Square8 (Subclass of Shape8, Implements ComputeData)** - **Attributes**: - `width`: double - **Methods**: - `Square8(color: String, width: double)`: Constructor - `toString(): String` - …necessary methods not detailed here - **Note**: - Area calculation formula: `area = width * width` In the provided design, `Circle8` and `Square8` classes extend the `Shape8` class, inheriting its attributes and functionality, while `Square8` also implements the `ComputeData` interface, providing specific implementations for calculating the diagonal. The abstract `getArea()` method must be implemented in the subclasses, ensuring that each shape type handles area calculation appropriately. The `compareTo` method is intended for comparing shape objects, possibly by their area or other attributes.
1. The program should be named: xxxx_Lab8.java (xxxx is your email ID).
2. Implement the necessary methods for each class.
3. The test class xxxxx_Lab8 should have a main() method that will call three methods: readData(), sort(), report().
4. The readData() method will take 3 input records from the keyboard, in the format: 
   ```
   color radius_or_width type 
   ```
   (Fields are separated by spaces)
   
   For example:
   ```
   blue 10 circle
   yellow 5.5 square
   red 5 circle
   ```
5. Use a Shape8 array to hold these objects. If the type is circle, create a Circle8 object to hold the data. If the type is square, create a Square8 object to hold the data.
6. The sort() method will sort the three objects’ areas from low to high.
7. The report() method will print the sorted objects with the following information:
   - **Circle Object:** Color, area, and radius.
   - **Square Object:** Color, area, width, and diagonal.
8. The above test data should produce the following output:
   - Color: yellow, Area: 30.25, Width: 5.5, Diagonal: 7.7781745930520225
   - Color: red, Area: 78.53981633974483, Radius: 5.0
   - Color: blue, Area: 314.1592653589793, Radius: 10.0
Transcribed Image Text:1. The program should be named: xxxx_Lab8.java (xxxx is your email ID). 2. Implement the necessary methods for each class. 3. The test class xxxxx_Lab8 should have a main() method that will call three methods: readData(), sort(), report(). 4. The readData() method will take 3 input records from the keyboard, in the format: ``` color radius_or_width type ``` (Fields are separated by spaces) For example: ``` blue 10 circle yellow 5.5 square red 5 circle ``` 5. Use a Shape8 array to hold these objects. If the type is circle, create a Circle8 object to hold the data. If the type is square, create a Square8 object to hold the data. 6. The sort() method will sort the three objects’ areas from low to high. 7. The report() method will print the sorted objects with the following information: - **Circle Object:** Color, area, and radius. - **Square Object:** Color, area, width, and diagonal. 8. The above test data should produce the following output: - Color: yellow, Area: 30.25, Width: 5.5, Diagonal: 7.7781745930520225 - Color: red, Area: 78.53981633974483, Radius: 5.0 - Color: blue, Area: 314.1592653589793, Radius: 10.0
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