UML[ 01 ] Code with Abstract and Interface

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UML[ 01 ] Code with Abstract and Interface 1
public class Book {

	public String bId,bName;
	public Book(String bId,String bName)
	{
		this.bId=bId;
		this.bName=bName;
	}
	public void display()
	{
		System.out.println("Book ID:"+bId+"\tBook Name:"+bName);
	}
}
public interface Habits {
	public void reading();

}
public abstract class Person {
	public int age;
	public Person(int age)
	{
		this.age=age;
	}
	public abstract void display();

}
public class Student extends Person implements Habits {

	public String id;
	private String name;
	Book book;
	public Student(int age,String id,String name,Book book) {
		super(age);
		this.id=id;
		this.name=name;
		this.book=book;
	}
	public void display()
	{
		System.out.println("Age:"+age);
		System.out.println("ID:"+id+"\tName:"+name);
		
		book.display();
	}
	
	public void reading() {
		System.out.println(name+" Read the Book!");
		
	}
	public static void main(String[] args) {
		Book b1 = new Book("CSE-212","OOP");
		Student s1= new Student(21,"11820","Nurnobi Hosen",b1);
		s1.display();
		s1.reading();
	}
}

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