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The first image is the spec. The second image is my code, what/where should I fix?

The first image is the spec. The second image is my code, what/where should I fix?

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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The first image is the spec.

The second image is my code, what/where should I fix?

```java import java.util.*; public class CountEvens { public static void main(String[] args) { Random r = new Random(); // Generate 10 values between 0 and 100 System.out.println(countEvens(10, 100, r)); // Generate 100 values between 0 and 10 System.out.println(countEvens(100, 10, r)); // Generate 1 value between 0 and 5 System.out.println(countEvens(1, 5, r)); // Generate 8 values between 0 and 37 System.out.println(countEvens(8, 37, r)); } // Write your countEvens method here public static int countEvens(int times, int max, Random r) { int number = r.nextInt(max - 0 + 1) + 0; if (number % 2 == 0) { System.out.print(number); } return number; } } ``` ### Description This Java program defines a class `CountEvens` which includes a `main` method that uses a `countEvens` method to generate random numbers within specified ranges and counts how many of these numbers are even. - **Lines 1-2:** Import necessary Java utilities. - **Line 4:** Declares the main class `CountEvens`. - **Line 5:** The `main` method begins execution, setting up a random number generator `r`. ### Code Execution: - **Lines 8-17:** Several calls to `countEvens` output the number of even numbers generated. The ranges and times of generation are specified: - **Line 8:** Generates 10 random numbers between 0 and 100. - **Line 11:** Generates 100 random numbers between 0 and 10. - **Line 14:** Generates 1 random number between 0 and 5. - **Line 17:** Generates 8 random numbers between 0 and 37. ### `countEvens` Method: - **Lines 22-27:** The `countEvens` method generates a number of random integers and checks if each one is even. - **Line 23:** Generates a random integer within the specified range (0 to `max`). - **Lines 24-26:** Checks
Transcribed Image Text:```java import java.util.*; public class CountEvens { public static void main(String[] args) { Random r = new Random(); // Generate 10 values between 0 and 100 System.out.println(countEvens(10, 100, r)); // Generate 100 values between 0 and 10 System.out.println(countEvens(100, 10, r)); // Generate 1 value between 0 and 5 System.out.println(countEvens(1, 5, r)); // Generate 8 values between 0 and 37 System.out.println(countEvens(8, 37, r)); } // Write your countEvens method here public static int countEvens(int times, int max, Random r) { int number = r.nextInt(max - 0 + 1) + 0; if (number % 2 == 0) { System.out.print(number); } return number; } } ``` ### Description This Java program defines a class `CountEvens` which includes a `main` method that uses a `countEvens` method to generate random numbers within specified ranges and counts how many of these numbers are even. - **Lines 1-2:** Import necessary Java utilities. - **Line 4:** Declares the main class `CountEvens`. - **Line 5:** The `main` method begins execution, setting up a random number generator `r`. ### Code Execution: - **Lines 8-17:** Several calls to `countEvens` output the number of even numbers generated. The ranges and times of generation are specified: - **Line 8:** Generates 10 random numbers between 0 and 100. - **Line 11:** Generates 100 random numbers between 0 and 10. - **Line 14:** Generates 1 random number between 0 and 5. - **Line 17:** Generates 8 random numbers between 0 and 37. ### `countEvens` Method: - **Lines 22-27:** The `countEvens` method generates a number of random integers and checks if each one is even. - **Line 23:** Generates a random integer within the specified range (0 to `max`). - **Lines 24-26:** Checks
### Java Programming: Writing a Method to Count Even Numbers #### Objective Create a static method called `countEvens()` that generates a series of random numbers and returns the count of even numbers. This method should take three parameters: - `int times` - the number of random numbers to generate. - `int max` - the maximum possible value for the generated numbers. - `Random r` - the `Random` object used for number generation. #### Method Details The method should generate `times` random integers between 0 and `max` (inclusive) utilizing the `Random` object `r`. It should then return the count of numbers that are even. You can assume that both `times` and `max` are positive integers greater than 0. #### Hint Utilize the Java modulo (`%`) operator to determine even numbers. #### Testing the Method A main method has been provided to test your `countEvens` method. Ensure your method is written to avoid errors with the provided main method. Note that these tests are not exhaustive. #### Code Example ```java public static int countEvens(int times, int max, Random r) { int number = 0; for (int i = 1; i <= times; i++) { number = r.nextInt(max + 1); if (number % 2 == 0) { System.out.print(number + " "); } } return number; } ``` #### Console Output Example This section displays generated numbers from several method calls: - `34 72 0 46 4 74 16 61` - `8 8 4 2 8 0 4 8 4 2 0 2 4 8 8 2 4 6 4 0 2` The output represents the numbers generated during each run, with even numbers highlighted. #### Conclusion This exercise helps in understanding how to work with random number generation and condition checking in Java. Review the results to ensure the method works correctly, especially with random inputs. Ensure your code is robust by testing edge cases. Click "Expand" to see grading criteria for this problem.
Transcribed Image Text:### Java Programming: Writing a Method to Count Even Numbers #### Objective Create a static method called `countEvens()` that generates a series of random numbers and returns the count of even numbers. This method should take three parameters: - `int times` - the number of random numbers to generate. - `int max` - the maximum possible value for the generated numbers. - `Random r` - the `Random` object used for number generation. #### Method Details The method should generate `times` random integers between 0 and `max` (inclusive) utilizing the `Random` object `r`. It should then return the count of numbers that are even. You can assume that both `times` and `max` are positive integers greater than 0. #### Hint Utilize the Java modulo (`%`) operator to determine even numbers. #### Testing the Method A main method has been provided to test your `countEvens` method. Ensure your method is written to avoid errors with the provided main method. Note that these tests are not exhaustive. #### Code Example ```java public static int countEvens(int times, int max, Random r) { int number = 0; for (int i = 1; i <= times; i++) { number = r.nextInt(max + 1); if (number % 2 == 0) { System.out.print(number + " "); } } return number; } ``` #### Console Output Example This section displays generated numbers from several method calls: - `34 72 0 46 4 74 16 61` - `8 8 4 2 8 0 4 8 4 2 0 2 4 8 8 2 4 6 4 0 2` The output represents the numbers generated during each run, with even numbers highlighted. #### Conclusion This exercise helps in understanding how to work with random number generation and condition checking in Java. Review the results to ensure the method works correctly, especially with random inputs. Ensure your code is robust by testing edge cases. Click "Expand" to see grading criteria for this problem.
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