Hello, I am having some difficulty understanding what is exactly going on in a program, and its demo class as well. I have circled the area in both class to show which parts I am having trouble with. Can someone please explain to me in detail line by line what each part means?

Thank you.

1 public class Person //instance variables private String name; 4 //default constructor 6 public Person() name - 10 /on-static methods 11 public void setName (String newName) 12 name newName; 14 15 public String getName() 16 17 18 19 20 21 public String toString) return name; //overriding a method replaces a method definition in a parent class //with a definition that is more appropriate for the child class return "Name: name; 24 25 26 27 28 29 30 31 32 //override the equals method from the Object class public boolean equals (0bject otherObject) f boolean isEqual = false; if(otherObject !-null && other0bject instanceof Person) { Person otherPerson(Person)otherObject; //object type casting if(this.name. equals (otherPerson.name)) i isEqual = true; return isEqual; 34 35 36 1 inport java.util.scanner; 2 public class Demo4 f 4 public static void main(Stringl args) /I TODO Auto-generatedmethod stub Scanner keyboardnew Scanner (System.in) Person [] csc202Class new Person [26] int studentIndex1; int option; 13 14 15 16 17 System.out.println("Press 1 to change the professor") System.out.println("Press 2 to add a student to the class" System.out.println("Press 3 to show everyone in the class including the professor" System.out.println("Press 4 to end the program"); option- keyboard.nextInto keyboard.nextine); 19 if (option1) System.out.println("Enter the name of the professor") String namekeyboard.nextline 21 23 24 25 26 System. out.println("Enter the employee id"); int enployeeld keyboard.nextInt); keyboard.nextLine) System.out.println("Enter the department of the professor); String department keyboard.nextLine); 28 Faculty currentProfessor - new Faculty) currentProfessor.setName (name) currentProfessor.setEmployeeId(employeeId); currentProfessor.setDepartment(department); 34 csc202Class [0] currentProfessor; 35 37 39 41 else if(option-2) System.out.println("Enter the name of the student"); String namekeyboard.nextLine) System. out.println("Enter the student id") int studentId keyboard.nextIntO; 45 46 47 Student currentStudent-new Student ); currentStudent.setName (name); currentStudent.setStudentId(studentId) if(studentIndex