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import java.util.*; import java.util.stream.*; public class Main { public static void main(String[] args) { Sub.main(args); } } class Sub { public static void main(String[] args) { List<Animal> animals = new ArrayList<>(); animals.add(new Cat(3)); animals.add(new Mike(5)); animals.add(new Dog(7)); var breeder = new Breeder(); breeder.breed(animals); } } class u { public static <T> void pln(T t) { System.out.println(t); } public static <T> void pln() { System.out.println(); } } abstract class Animal { protected int age; protected String voice; public Animal(int age) { this.age = age; } public String toString() { var str = this.voice + "(" + this.age + ")"; return str; } public void cry() { System.out.println(this.toString()); } } class Cat extends Animal { public Cat(int age) { super(age); this.voice = "ニャー"; } } class Mike extends Cat { public Mike(int age) { super(age); this.voice = "ミケニャー"; } } class Dog extends Animal { public Dog(int age) { super(age); this.voice = "ワン"; } } class Breeder { public void breed(List<Animal> animals) { animals.stream().forEach((var animal) -> { System.out.println(animal); }); } } |
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ニャー(3) ミケニャー(5) ワン(7) |
