Added 8 solutions

General Programming/Object-oriented Programming/Inheritance/Solution.java

@@ -0,0 +1,87 @@
+//     Author: Rodney Shaghoulian
+//     Github: github.com/rshaghoulian
+// HackerRank: hackerrank.com/rshaghoulian
+
+import java.util.*;
+
+class Person {
+    protected String firstName;
+    protected String lastName;
+    protected int idNumber;
+    
+    // Constructor
+    Person(String firstName, String lastName, int identification) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.idNumber = identification;
+    }
+    
+    // Print person data
+    public void printPerson() {
+         System.out.println(
+                "Name: " + lastName + ", " + firstName 
+            +   "\nID: " + idNumber); 
+    }
+}
+
+class Student extends Person {
+    private int[] testScores;
+
+    /*  
+    *   Class Constructor
+    *   
+    *   @param firstName - A string denoting the Person's first name.
+    *   @param lastName - A string denoting the Person's last name.
+    *   @param id - An integer denoting the Person's ID number.
+    *   @param scores - An array of integers denoting the Person's test scores.
+    */
+    public Student(String firstName, String lastName, int id, int [] scores) {
+        super(firstName, lastName, id);
+        testScores = scores;
+    }
+
+    /*  
+    *   Method Name: calculate
+    *   @return A character denoting the grade.
+    */
+    public char calculate() {
+        double average = 0;
+        for (int score : testScores) {
+            average += score;
+        }
+        average /= testScores.length;
+        
+        if  (average >= 90) {
+            return 'O';
+        } else if (average >= 80) {
+            return 'E';
+        } else if (average >= 70) {
+            return 'A';
+        } else if (average >= 55) {
+            return 'P';
+        } else if (average >= 40) {
+            return 'D';
+        } else {
+            return 'T';
+        }
+    }
+}
+
+class Solution {
+    public static void main(String[] args) {
+        Scanner scan = new Scanner(System.in);
+        String firstName = scan.next();
+        String lastName = scan.next();
+        int id = scan.nextInt();
+        int numScores = scan.nextInt();
+        int[] testScores = new int[numScores];
+        for (int i = 0; i < numScores; i++) {
+            testScores[i] = scan.nextInt();
+        }
+        scan.close();
+        
+        Student s = new Student(firstName, lastName, id, testScores);
+        s.printPerson();
+        System.out.println("Grade: " + s.calculate());
+    }
+}