HR자바 Java Abstract Class

개요

HR자바 Java Abstract Class

• https://www.hackerrank.com/challenges/java-abstract-class/problem

해커랭크 Java

#	문제	비고
HR자바 Object Oriented Programming e
43	HR자바 Java Inheritance I
44	HR자바 Java Inheritance II
45	HR자바 Java Abstract Class
46	HR자바 Java Interface
47	HR자바 Java Method Overriding
48	HR자바 Java Method Overriding 2 (Super Keyword)
49	HR자바 Java Instanceof keyword
50	HR자바 Java Iterator

---

Java

Copy

import java.util.*;
abstract class Book{
    String title;
    abstract void setTitle(String s);
    String getTitle(){
        return title;
    }
}

Java

Copy

//Write MyBook class here
class MyBook extends Book {
    void setTitle(String s) {
        this.title = s;
    }
}

Java

Copy

public class Main{
    public static void main(String []args){
        //Book new_novel=new Book(); This line prHMain.java:25: error: Book is abstract; cannot be instantiated
        Scanner sc=new Scanner(System.in);
        String title=sc.nextLine();
        MyBook new_novel=new MyBook();
        new_novel.setTitle(title);
        System.out.println("The title is: "+new_novel.getTitle());
        sc.close();
    }
}