ЯсноПонятно24

public class Student {
    
    private String name;
    private int age;
    private Book book;

    public Student(String name, int age, String bookTitle, String bookAuthor) {
        this.name = name;
        this.age = age;
        this.book = new Book(bookTitle, bookAuthor);
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public Book getBook() {
        return book;
    }

    public class Book {
        
        private String title;
        private String author;

        public Book(String title, String author) {
            this.title = title;
            this.author = author;
        }

        public String getTitle() {
            return title;
        }

        public String getAuthor() {
            return author;
        }
    }
}