lab-java-basics

src/Task1/Main.java

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+package Task1;
+
+public class Main {
+
+    public static int difference(int[] numbers) {
+        int min = numbers[0];
+        int max = numbers[0];
+
+        for (int num : numbers) {
+            if (num < min) min = num;
+            if (num > max) max = num;
+        }
+
+
+        return max - min;
+    }
+
+    public static void main(String[] args) {
+        int[] arr = {5, 2, 9, 1, 7};
+        System.out.println("Difference: " + difference(arr));
+    }
+}

src/Task2/Main.java

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+package Task2;
+
+public class Main {
+
+    public static void main(String[] args) {
+        int[] arr = {5, 2, 9, 1, 7};
+
+        findTwoSmallest(arr);
+    }
+
+    public static void findTwoSmallest(int[] numbers) {
+        int smallest = Integer.MAX_VALUE;
+        int secondSmallest = Integer.MAX_VALUE;
+
+        for (int num : numbers) {
+            if (num < smallest) {
+                secondSmallest = smallest;
+                smallest = num;
+            } else if (num < secondSmallest && num != smallest) {
+                secondSmallest = num;
+            }
+        }
+
+        System.out.println("Smallest: " + smallest);
+        System.out.println("Second Smallest: " + secondSmallest);
+    }
+}

src/Task3/Employee.java

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+package Task3;
+
+public class Employee {
+
+    String name;
+    double salary;
+
+    public void displayInfo() {
+        System.out.println("Name: " + name);
+        System.out.println("Salary: " + salary);
+    }
+
+    public void increaseSalary(double amount) {
+        salary += amount;
+    }
+}

src/Task3/Main.java

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+package Task3;
+
+public class Main {
+
+    public static void main(String[] args) {
+
+        Employee emp1 = new Employee();
+        emp1.name = "Hadi";
+        emp1.salary = 3000;
+
+        emp1.displayInfo();
+
+        System.out.println("---- After Increase ----");
+
+        emp1.increaseSalary(500);
+        emp1.displayInfo();
+    }
+}

src/Task4/Employee.java

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+package Task4;
+
+public class Employee {
+
+    private String name;   // Employee name
+    private double salary; // Employee salary
+
+    public Employee(String name, double salary) {
+        this.name = name;
+        this.salary = salary;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public double getSalary() {
+        return salary;
+    }
+
+    public void setSalary(double salary) {
+        if (salary > 0) { // Only positive salary allowed
+            this.salary = salary;
+        }
+    }
+
+    public void displayInfo() {
+        System.out.println("Name: " + name);
+        System.out.println("Salary: " + salary);
+    }
+}

src/Task4/Intern.java

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+package Task4;
+
+public class Intern extends Employee {
+
+    private static final double MAX_SALARY = 20000; // Maximum allowed salary
+
+    public Intern(String name, double salary) {
+        super(name, 0);      // Initialize salary to 0 first
+        setSalary(salary);   // Set salary with validation
+    }
+
+    @Override
+    public void setSalary(double salary) {
+        if (salary <= MAX_SALARY) {
+            super.setSalary(salary);  // Apply salary if within limit
+        } else {
+            System.out.println("Salary exceeds max limit of " + MAX_SALARY);
+        }
+    }
+}

src/Task4/Main.java

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+package Task4;
+
+public class Main {
+
+    public static void main(String[] args) {
+
+        Intern intern1 = new Intern("Parsa", 15000);
+        intern1.displayInfo();
+
+        System.out.println("Trying to increase salary to 25000");
+        intern1.setSalary(25000); // Should not change
+        intern1.displayInfo();
+
+        System.out.println("Updating salary to 18000");
+        intern1.setSalary(18000); // Should apply
+        intern1.displayInfo();
+    }
+}

src/Task5/Employees.java

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+package Task5;
+
+// Employees class with full properties
+public class Employees {
+
+    private String name;
+    private double salary;
+    private int age;
+    private int experience; // years of experience
+    private String department;
+
+    // Constructor
+    public Employees(String name, double salary, int age, int experience, String department) {
+        this.name = name;
+        this.salary = salary;
+        this.age = age;
+        this.experience = experience;
+        this.department = department;
+    }
+
+    // Getters
+    public String getName() {
+        return name;
+    }
+
+    public double getSalary() {
+        return salary;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public int getExperience() {
+        return experience;
+    }
+
+    public String getDepartment() {
+        return department;
+    }
+
+    // Setters
+    public void setSalary(double salary) {
+        if (salary > 0) this.salary = salary;
+    }
+
+    public void setAge(int age) {
+        if (age > 0) this.age = age;
+    }
+
+    public void setExperience(int experience) {
+        if (experience >= 0) this.experience = experience;
+    }
+
+    public void setDepartment(String department) {
+        this.department = department;
+    }
+
+
+    public void displayInfo() {
+        System.out.println("Name: " + name +
+                " | Salary: " + salary +
+                " | Age: " + age +
+                " | Experience: " + experience +
+                " | Department: " + department);
+    }
+}

src/Task5/Main.java

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+package Task5;
+
+public class Main {
+
+    public static void main(String[] args) {
+
+        Object[][] data = {
+                {"Saba", 59000.0, 31, 2, "AI"},
+                {"Hadi", 58000.0, 33, 3, "IT"},
+                {"Sepehr", 48000.0, 28, 3, "Marketing"},
+                {"Sohrab", 49000.0, 40, 15, "HR"},
+                {"Siavash", 52000.0, 32, 7, "IT"},
+                {"Fereydoon", 47000.0, 27, 2, "Finance"},
+                {"George", 53000.0, 34, 8, "Marketing"},
+                {"Pooran", 49000.0, 29, 4, "HR"},
+                {"Sara", 51000.0, 31, 6, "IT"},
+                {"Parsa", 56000.0, 38, 12, "Finance"},
+                {"Babak", 56000.0, 38, 12, "Marketing"}
+        };
+
+        Employees[] employees = new Employees[data.length];
+
+        for (int i = 0; i < data.length; i++) {
+            String name = (String) data[i][0];
+            double salary = (double) data[i][1];
+            int age = (int) data[i][2];
+            int exp = (int) data[i][3];
+            String dept = (String) data[i][4];
+
+            employees[i] = new Employees(name, salary, age, exp, dept);
+        }
+
+        for (Employees emp : employees) {
+            emp.displayInfo();
+        }
+    }
+}