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test: adding subject and main
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public class ExerciseRunner {
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public static void main(String[] args) {
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PerfectNumber perfectNumber = new PerfectNumber();
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// Test case 1
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int number1 = 6;
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System.out.println("Is " + number1 + " a perfect number? " + perfectNumber.isPerfectNumber(number1));
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// Test case 2
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int number2 = 28;
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System.out.println("Is " + number2 + " a perfect number? " + perfectNumber.isPerfectNumber(number2));
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// Test case 3
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int number3 = 12;
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System.out.println("Is " + number3 + " a perfect number? " + perfectNumber.isPerfectNumber(number3));
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}
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}
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## Perfect Number
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### Instructions
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Write a program to check if a given number is a perfect number. A perfect number is a positive integer that is equal to the sum of its proper positive divisors, excluding itself.
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### Expected Class
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```java
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public class PerfectNumber {
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public boolean isPerfectNumber(int number) {
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// Implementation to check if the given number is a perfect number
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}
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}
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```
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### Usage
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Here is a possible `ExerciseRunner.java` to test your class:
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```java
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public class ExerciseRunner {
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public static void main(String[] args) {
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PerfectNumber perfectNumber = new PerfectNumber();
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// Test case 1
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int number1 = 6;
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System.out.println("Is " + number1 + " a perfect number? " + perfectNumber.isPerfectNumber(number1));
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// Test case 2
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int number2 = 28;
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System.out.println("Is " + number2 + " a perfect number? " + perfectNumber.isPerfectNumber(number2));
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// Test case 3
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int number3 = 12;
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System.out.println("Is " + number3 + " a perfect number? " + perfectNumber.isPerfectNumber(number3));
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}
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}
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```
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### Expected Output
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```shell
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$ javac *.java -d build
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$ java -cp build ExerciseRunner
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Is 6 a perfect number? true
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Is 28 a perfect number? true
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Is 12 a perfect number? false
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$
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```
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