class Book {
	private String bookId;
	private String title;
	private int pages;
	private String authors;
	public Book(String pBookId, String pTitle) {
		bookId=pBookId;
		title=pTitle;
	}
	public void setTitle(String pTitle){
		title=pTitle;
	}
	public void setPages(int pPages) {
	pages=pPages;
	}
	public void setAuthors(String pAuthors) {
	authors=pAuthors;
	}
	public String getBook() {
	return (bookId +":"+ title + ":" + pages);
	}
}
class Student {
	private String studentId;
	private String studentName;
	private String address;
	private int age;
	
	public Student(String pStudentId, String pStudentName) {		
		studentId=pStudentId;
		studentName=pStudentName;
		}
	public void setStudentName(String pStudentName) {
		studentName=pStudentName;
		}
	public void setAddress(String pAddress) {
		address=pAddress;
		}	
	public void setAge(int pAge) {age=pAge;}
		
	public String getStudent() {
		 return (studentId + ":" + studentName + ":" + address + ":" + age);
		}
}	
public class ex3Prog {
	private Book bk1,bk2,bk3;
	private Student stu1,stu2,stu3;
	
	public ex3Prog() {
		bk1=new Book("CS001","Intro. to Computer");
		displayBook(bk1);
		
		bk1.setAuthors("John");
		bk1.setPages(200);
		displayBook(bk1);
		stu1=new Student("44111315","Mr.Mongkhon");
		displayStudent(stu1);
		
		stu1.setAddress("Narita,Tokyo");
		stu1.setAge(19);
		displayStudent(stu1);
		}
	private void displayBook(Book pBook){
			System.out.println(pBook. getBook());
			}
	private void displayStudent(Student pStudent) {
		System.out.println(pStudent.getStudent());
		}
	private static void main(String[] args) {
		ex3Prog e3=new ex3Prog();
		}
}