(资料图片仅供参考)

1、interface CanFly { void fly(); } class Plane implements CanFly { @Override public void fly() { System.out.println("飞机起飞了!"); } } class Bird implements CanFly { @Override public void fly() { System.out.println("鸟飞了!"); } } public class CanFlyTest { public static void makeFly(CanFly canFly) { canFly.fly(); } public static void main(String[] args) { CanFly plane = new Plane(); CanFly bird = new Bird(); makeFly(plane); makeFly(bird); } }。

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