Задача ООП

import java.util.Scanner;
 
public class StartingClass {
    
    private static Scanner scanner;
    private static Man man;
    private static Student student;
 
    public static void main(String[] args) {
        
        scanner = new Scanner(System.in);
        
        man =  new Man();
        student = new Student() ;
                
        System.out.print("Enter the name: ");
        man.setName(scanner.nextLine());
        
        System.out.print("Enter the Sex (M or W): ");
        man.setSex(scanner.nextLine());
                    
        System.out.print("Enter the age: ");
        man.setAge(scanner.nextInt());
        
        System.out.print("Enter the year of Stady: ");
        student.setYearOfStudy(scanner.nextInt());
        
        System.out.println("________");
                                
        System.out.println("Name = "+ man.getName());
        System.out.println("Sex = "+ man.getSex());
        System.out.println("Age = "+ man.getAge());
        System.out.println("Year of Stady = "+ student.getYearOfStudy());   
        
        System.out.println("________");
        
        System.out.print("Year inc on: ");
        int incDec = scanner.nextInt();
        
        student.yearInc(incDec);        
        System.out.println("Yera of Stady inc = "+student.getYearOfStudy());
    }
}

public class Man {
    
    private String name;
    private String sex;
    private int age;
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
}

public class Student extends Man {
    private int yearOfStudy;
        
    public int getYearOfStudy() {
        return yearOfStudy;
    }
 
    public void setYearOfStudy(int yearOfStudy) {
        this.yearOfStudy = yearOfStudy;
    }
    
    public void yearInc(int yearOfStudy){
        this.yearOfStudy = this.yearOfStudy + yearOfStudy;
    }
}

boolean equals(Object o){
if (this instanceof o) then
    if (allFieldsOfThis == allFieldsOfO){
         return true;
    }
}
return false
}