非继承类的复用

public class fuyong {/* * 通过非继承 来对其他方法 进行复用 * */public static void main(String[] args) {Animal animal = new Animal();Bird bird = new Bird(animal);bird.beat();}}class  Animal{public void beat () {System.out.println("animal beat");}}class Bird{ private Animal animal ; public Bird(Animal animal) { this.animal = animal;} void beat() { animal.beat(); }}