Finish lab

src/Employee.java

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+public class Employee {
+
+        // Private instance variables
+        private int employeeId;
+        private String firstName;
+        private String lastName;
+        private String email;
+        private String phoneNumber;
+        private String jobTitle;
+        private double salary;
+
+        // Constructor
+        public Employee(int employeeId, String firstName, String lastName, String email,
+                        String phoneNumber, String jobTitle, double salary) {
+            this.employeeId = employeeId;
+            this.firstName = firstName;
+            this.lastName = lastName;
+            this.email = email;
+            this.phoneNumber = phoneNumber;
+            this.jobTitle = jobTitle;
+            setSalary(salary); // Using setter to apply validation
+        }
+
+        // Getter and Setter methods
+        public int getEmployeeId() {
+            return employeeId;
+        }
+
+        public void setEmployeeId(int employeeId) {
+            this.employeeId = employeeId;
+        }
+
+        public String getFirstName() {
+            return firstName;
+        }
+
+        public void setFirstName(String firstName) {
+            this.firstName = firstName;
+        }
+
+        public String getLastName() {
+            return lastName;
+        }
+
+        public void setLastName(String lastName) {
+            this.lastName = lastName;
+        }
+
+        public String getEmail() {
+            return email;
+        }
+
+        public void setEmail(String email) {
+            this.email = email;
+        }
+
+        public String getPhoneNumber() {
+            return phoneNumber;
+        }
+
+        public void setPhoneNumber(String phoneNumber) {
+            this.phoneNumber = phoneNumber;
+        }
+
+        public String getJobTitle() {
+            return jobTitle;
+        }
+
+        public void setJobTitle(String jobTitle) {
+            this.jobTitle = jobTitle;
+        }
+
+        public double getSalary() {
+            return salary;
+        }
+
+        public void setSalary(double salary) {
+            if (salary >= 0) {
+                this.salary = salary;
+            } else {
+                throw new IllegalArgumentException("Salary must be non-negative.");
+            }
+        }
+
+        // Behaviors
+        public void work() {
+            System.out.println(firstName + " " + lastName + " is working as a " + jobTitle + ".");
+        }
+
+        public double getAnnualSalary() {
+            return salary * 12;
+        }
+
+        public void raiseSalary(double percentage) {
+            if (percentage > 0) {
+                salary += salary * (percentage / 100);
+            } else {
+                throw new IllegalArgumentException("Raise percentage must be positive.");
+            }
+        }
+
+    @Override
+    public String toString() {
+        return "Employee{" +
+                "employeeId=" + employeeId +
+                ", firstName='" + firstName + '\'' +
+                ", lastName='" + lastName + '\'' +
+                ", email='" + email + '\'' +
+                ", phoneNumber='" + phoneNumber + '\'' +
+                ", jobTitle='" + jobTitle + '\'' +
+                ", salary=" + salary +
+                '}';
+    }
+}
+
+

src/ExerciseFiveApplication.java

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+public class ExerciseFiveApplication {
+
+        public static void main(String[] args) {
+            Intern intern= new Intern(146, "Sten", "Mabel", "sten@gmail.com", "+2387878434", "IT-Specialist Intern", 40000);
+            Intern intern2= new Intern(2445, "Sara", "Kie", "kie@hotmail.com", "0492323457", "HR-Specialist Intern", 35000);
+            Intern intern3= new Intern(3555, "Luca", "kelvin", "luca@yahoo.com", "+99876345", "Marketing Specialist Intern", 42000);
+            System.out.println(intern);
+            System.out.println(intern2);
+            System.out.println(intern3);
+            // Array to hold 10 Employee objects
+            Employee[] employees = new Employee[10];
+
+            // Initialize each Employee object with sample data
+            employees[0] = new Employee(101, "Alice", "Smith", "alice.smith@example.com",
+                    "123-456-7890", "Software Engineer", 70000);
+            employees[1] = new Employee(102, "Bob", "Johnson", "bob.johnson@example.com",
+                    "234-567-8901", "Data Analyst", 65000);
+            employees[2] = new Employee(103, "Charlie", "Williams", "charlie.williams@example.com",
+                    "345-678-9012", "Product Manager", 80000);
+            employees[3] = new Employee(104, "David", "Brown", "david.brown@example.com",
+                    "456-789-0123", "UX Designer", 72000);
+            employees[4] = new Employee(105, "Eva", "Davis", "eva.davis@example.com",
+                    "567-890-1234", "Quality Assurance", 68000);
+            employees[5] = new Employee(106, "Frank", "Miller", "frank.miller@example.com",
+                    "678-901-2345", "DevOps Engineer", 75000);
+            employees[6] = new Employee(107, "Grace", "Wilson", "grace.wilson@example.com",
+                    "789-012-3456", "HR Manager", 71000);
+            employees[7] = new Employee(108, "Hannah", "Moore", "hannah.moore@example.com",
+                    "890-123-4567", "Marketing Specialist", 69000);
+            employees[8] = new Employee(109, "Ian", "Taylor", "ian.taylor@example.com",
+                    "901-234-5678", "Sales Executive", 67000);
+            employees[9] = new Employee(110, "Jane", "Anderson", "jane.anderson@example.com",
+                    "012-345-6789", "Customer Support", 64000);
+
+            // Iterate through the array and print details of each employee
+            for (Employee emp : employees) {
+                System.out.println(emp);
+                System.out.println("-------------------------------");
+            }
+        }
+    }
+
+

src/ExerciseFour.java

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+public class ExerciseFour {
+    public static void main(String[] args) {
+        // Creating an Employee object
+        Employee emp = new Employee(1010, "Olu", "Tosin", "tosin@gmail.com",
+                "015212099501", "Operational Lead", 45000);
+
+        // Displaying employee details
+        System.out.println("Employee ID: " + emp.getEmployeeId());
+        System.out.println("Name: " + emp.getFirstName() + " " + emp.getLastName());
+        System.out.println("Email: " + emp.getEmail());
+        System.out.println("Phone: " + emp.getPhoneNumber());
+        System.out.println("Job Title: " + emp.getJobTitle());
+        System.out.println("Monthly Salary: $" + emp.getSalary());
+        System.out.println("Annual Salary: $" + emp.getAnnualSalary());
+
+        // Simulating work
+        emp.work();
+
+        // Giving a raise
+        emp.raiseSalary(35);
+        System.out.println("New Monthly Salary after 35% raise: $" + emp.getSalary());
+
+    }
+}

src/ExerciseOneApplication.java

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+public class ExerciseOneApplication {
+    public static int findDiff(int[] numbers) {
+        // Validate that the array has at least one element
+        if (numbers == null || numbers.length == 0) {
+            System.out.println("list of values");  ;
+        }
+
+        // Initialize min and max with the first element of the array
+        int min = numbers[0];
+        int max = numbers[0];
+
+        // Iterate through the array to find the minimum and maximum values
+        for (int i = 1; i < numbers.length; i++) {
+            if (numbers[i] < min) {
+                min = numbers[i];
+            } else if (numbers[i] > max) {
+                max = numbers[i];
+            }
+        }
+
+        // Return the difference between the maximum and minimum values
+        return max - min;
+    }
+
+    public static void main(String[] args) {
+        int[] array = {18, 56, 27, 99, 53};
+        int difference = findDiff(array);
+        System.out.println("Difference between values: " + difference);
+    }
+}
+

src/ExerciseTwoApplication.java

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+public class ExerciseTwoApplication {
+    public static void findValue(int[] array) {
+        // Check if the array has at least two elements
+        if (array == null || array.length < 2) {
+            System.out.println("Array must contain at least two elements.");
+            return;
+        }
+
+        // Initialize the smallest and second smallest with maximum possible values
+        int smallest = Integer.MAX_VALUE;
+        int secondSmallest = Integer.MAX_VALUE;
+
+        // Iterate through the array to find the smallest and second smallest elements
+        for (int num : array) {
+            if (num < smallest) {
+                secondSmallest = smallest;
+                smallest = num;
+            } else if (num > smallest && num < secondSmallest) {
+                secondSmallest = num;
+            }
+        }
+
+        // Check if a valid second smallest element was found
+        if (secondSmallest == Integer.MAX_VALUE) {
+            System.out.println("No distinct second smallest element found.");
+        } else {
+            System.out.println("The smallest element is " + smallest +
+                    " and the second smallest element is " + secondSmallest + ".");
+        }
+    }
+
+    public static void main(String[] args) {
+        int[] array = {52, 77, -8, 12, 14, 31};
+        findValue(array);
+    }
+}
+

src/Intern.java

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+public class Intern extends Employee{
+
+    private final double MAX_SALARY = 20_000.0;
+
+    public Intern(int employeeId, String firstName, String lastName, String email, String phoneNumber, String jobTitle, double salary) {
+        super(employeeId, firstName, lastName, email, phoneNumber, jobTitle, salary);
+        if (salary > MAX_SALARY){
+            this.setSalary(MAX_SALARY);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "Intern{" +
+                "MAX_SALARY=" + MAX_SALARY +
+                "} " + super.toString();
+    }
+}