Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Java

 

class Main {
publicstaticvoid main(String[] args) {
/*
* Use this code to test your Hexagon class.
* Uncomment the items as you complete parts of the Hexagon class.
*/

Hexagon myHex = new Hexagon();
// Hexagon myOtherHex = new Hexagon(5);

// // print info about myHex
// System.out.println("Information about myHex");
// displayHex(myHex);

// System.out.println();

// // print info about myOtherHex
// System.out.println("Information about myOtherHex");
// displayHex(myOtherHex);

// System.out.println();

// myHex.setSide(3);
// // print info about myHex after changing side length
// System.out.println("Information about myHex with side length 3");
// displayHex(myHex);

}

publicstaticvoid displayHex(Hexagon h) {
// System.out.println("Side length: " + h.getSide());
// System.out.println("Perimeter: " + h.getPerimeter());
// System.out.println("Diagonal length: " + h.getDiagonalLength());
// System.out.println("Surface area: " + h.getArea());
}
}
### A Hexagon

The image shows a hexagon inscribed in a circle. The hexagon's interior angles are 120°, and it is divided into six equilateral triangles. Each triangle has angles of 60°.

### Steps

1. **Add a field to the Hexagon.java class called `side`.**  
   - It should be a double.

2. **Write a no arguments constructor.**  
   - Set `side = 0.0`.

3. **Write a constructor that accepts a double parameter.**  
   - Set `side` equal to the value passed in.

4. **Write accessor/mutator methods for the field `side`.**

5. **Write a method (`getPerimeter()`) that returns a double and calculates the perimeter of the Hexagon.**  
   - The formula for this is: `perimeter = side * 6`

6. **Write a method (`getDiagonalLength()`) that returns a double that is the distance from one 'corner' to its opposite 'corner'.**  
   - The formula for this is: `diagonalLength = side * 2`

7. **Write a method (`getArea()`) which returns a double containing the surface area of the hexagon.**  
   - The formula for this is: `(3/2 * sqrt(3) * side ^ 2)`. Take care with integer division here.
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Transcribed Image Text:### A Hexagon The image shows a hexagon inscribed in a circle. The hexagon's interior angles are 120°, and it is divided into six equilateral triangles. Each triangle has angles of 60°. ### Steps 1. **Add a field to the Hexagon.java class called `side`.** - It should be a double. 2. **Write a no arguments constructor.** - Set `side = 0.0`. 3. **Write a constructor that accepts a double parameter.** - Set `side` equal to the value passed in. 4. **Write accessor/mutator methods for the field `side`.** 5. **Write a method (`getPerimeter()`) that returns a double and calculates the perimeter of the Hexagon.** - The formula for this is: `perimeter = side * 6` 6. **Write a method (`getDiagonalLength()`) that returns a double that is the distance from one 'corner' to its opposite 'corner'.** - The formula for this is: `diagonalLength = side * 2` 7. **Write a method (`getArea()`) which returns a double containing the surface area of the hexagon.** - The formula for this is: `(3/2 * sqrt(3) * side ^ 2)`. Take care with integer division here.
## Results

When complete, running the test code should generate the following output:

### Information about myHex
- **Side length:** 0.0
- **Perimeter:** 0.0
- **Diagonal length:** 0.0
- **Surface area:** 0.0

### Information about myOtherHex
- **Side length:** 5.0
- **Perimeter:** 30.0
- **Diagonal length:** 10.0
- **Surface area:** 64.9519052838329

### Information about myHex with side length 3
- **Side length:** 3.0
- **Perimeter:** 18.0
- **Diagonal length:** 6.0
- **Surface area:** 23.382685902179844

This text output provides detailed information about hexagonal dimensions, including side length, perimeter, diagonal length, and surface area for different hexagonal shapes.
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Transcribed Image Text:## Results When complete, running the test code should generate the following output: ### Information about myHex - **Side length:** 0.0 - **Perimeter:** 0.0 - **Diagonal length:** 0.0 - **Surface area:** 0.0 ### Information about myOtherHex - **Side length:** 5.0 - **Perimeter:** 30.0 - **Diagonal length:** 10.0 - **Surface area:** 64.9519052838329 ### Information about myHex with side length 3 - **Side length:** 3.0 - **Perimeter:** 18.0 - **Diagonal length:** 6.0 - **Surface area:** 23.382685902179844 This text output provides detailed information about hexagonal dimensions, including side length, perimeter, diagonal length, and surface area for different hexagonal shapes.
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