Unit 5, 9 & 10

Unit 5 Hack (Putting it all together):

Demonstrate the usage of classes and core concepts of unit 5

Create a class and tester method which incorporates all core ideas taught in this post
Class which has a constructor which sets at least 1 public and 1 private attribute (incorporate “this” keyword)
Class which has public and private attributes and methods
Class which has at least 1 static attribute
Class which has getters and setters for at least 1 private attribute
Make sure to create a tester method that verifies that your class is working and shows the getters and setters working

public class Student {
    private String name;
    private int id;
    private static int SID = 0; //static 
    
        public Student(String name){ 
            this.name = name;
            this.id = ++SID; 
        }
    
        public String getName(){
            return name;
        }

        public int getID(){
            return id;
        }

        public void setName(String newName){
            this.name = newName;
        }
        
        public String toString(){
            return getName() + getID();
        }
    
        public static int getCount(){
            return SID;
        }

    
        public static void main(String[] args){
    
        

        }
    }
    
    Student.main(null);

student 1 name: Emily
student 2 name: Alice
student 1 id: 3
student 2 id: 4
student 1 new name: Katie
student count: 4

Hack 2 (Putting it all together):

Demonstrate the usage of inheritance, polymorphism and overriding methods

Create a parent class of your choice
Create 2 subclasses from that parent superclass
incorporate some data and atleast one method into each class, using super keyword
Override superclass method in the subclasses
Use a tester method to create objects from the superclass that take on the forms of the subclasses, and print some outputs

public class Person {
private String name;
    public Person(String name){
        this.name = name;
    }

    public String getName(){
        return name;
    }

    public void job() {
        System.out.println("Work");
    }

}

class Student extends Person {

    public Student(String name){
        super(name);
    }

    @Override
    public void job() {
        System.out.println("Learn");
    }


    public static void main(String[] args) {
        Student student1 = new Student("Emily");
        System.out.println(student1.getName());
        student1.job();     
    }
}

Student.main(null);

Emily
Learn

class Teacher extends Person {

    public Teacher(String name){
        super(name);
    }

    @Override
    public void job() {
        System.out.println("Teach");
    }


    public static void main(String[] args) {
        Teacher teacher1 = new Teacher("Alice");
        System.out.println(teacher1.getName());
        teacher1.job();     
    }
}

Teacher.main(null);

Alice
Teach

Hacks

Create your own recursive algorithm of any type. Options include

Fibonacci, or factorial, although this is pretty basic
A more advanced version of this would be to create your own searching or sorting algorithm that utilizes recursive

public class Factorial {
    public static int factorial(int n) {
        if (n == 0) {
            return 1;
        } else {
            return n * factorial(n - 1);
        }
    }

    public static void main(String[] args) {
        System.out.println(factorial(3)); //1*2*3
    }
}

Factorial.main(null);

6