동물 (상속 연습)

public class Animal {

private double weight;

  String picture;

 

void setWeight(double weight) {this.weight = weight;}

double getWeight() {return weight;}

 

void eat() { System.out.print("eat()가 호출되었음");}

void sleep() {System.out.print("sleep()가 호출되었음");}

 

public String toString() {

return "몸무게: " + weight + "kg - 그림설명: " + picture;

 }

}

 

 

public class Eagle extends Animal{

private int wings = 0;

 

void fly() {

sleep();

System.out.print(":");

System.out.println("fly()가 호출되었음");

  }

 

public String toString() {

return "몸무게: " + getWeight() + "kg - 그림설명: " + picture + " - 날개: " + wings;

  }

}

 

 

public class Lion extends Animal{

private int legs= 4;

void roar() {

eat();

System.out.print(":");

System.out.println("roar()가 호출되었음");

}

public String toString() {

return "몸무게: " + getWeight() + "kg - 그림설명: " + picture + " - 다리: " + legs;

}

}

 

 

import java.util.Scanner;

public class Practice_60 {

 

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

 

Animal animal = new Animal();

 

System.out.println("Animal 객체 animal을 생성합니다.");

System.out.print("사진에 추가할 문장을 입력하세요: ");

animal.picture = input.next();

System.out.print("몸무게를 입력하세요: ");

animal.setWeight(input.nextDouble());

 

animal.eat();

System.out.println("\n");

 

Lion buba = new Lion();

 

System.out.println("Lion 객체 buba를 생성합니다.");

System.out.print("사진에 추가할 문장을 입력하세요: ");

buba.picture = input.next();

System.out.print("몸무게를 입력하세요: ");

buba.setWeight(input.nextDouble());

 

buba.roar();

System.out.println("\n");

 

Eagle paco = new Eagle();

System.out.println("Eagle 객체 paco을 생성합니다.");

System.out.print("사진에 추가할 문장을 입력하세요: ");

paco.picture = input.next();

System.out.print("몸무게를 입력하세요: ");

paco.setWeight(input.nextDouble());

 

paco.fly();

System.out.println("\n");

 

System.out.println("Animal 객체 animal의 정보입니다.");

System.out.println(animal.toString());

System.out.println("Lion 객체 buba의 정보입니다.");

System.out.println(buba.toString());

System.out.println("Eagle 객체 paco의 정보입니다.");

System.out.println(paco.toString());

System.out.println("\n");

 

input.close();

 }

}

 

 

결과: