如果两个类都实现相同的方法，则应考虑创建一个
interface。
接口非常强大且易于使用。
您可以调用界面
Shootable。
您可以创建一个不同的对象数组，这些对象实现 Shootable 并一视同仁。
// Define a VERY simple interface with one method.interface Shootable { public void beingShot();}// Any class that implements this interface can be treated interchangeablyclass Revolver implements Shootable { public void beingShot() { System.out.println("Revolver: firing 1 round");}class MachineGun implements Shootable { public void beingShot() { System.out.println("Machine Gun: firing 50 rounds"); }}class HockeyPuck implements Shootable { public void beingShot() { System.out.println("Hockey Puck: 80 MPH slapshot"); }}class RayBourquePuck implements Shootable { public void beingShot() { System.out.println("Hockey Puck: 110 MPH slapshot"); }}class OunceOfWhiskey implements Shootable { public void beingShot() { System.out.println("Whiskey Shot: 1 oz down the hatch..."); }}// You can declare an array of objects that implement ShootableShootable[] shooters = new Shootable[4];// You can store any Shootable object in your array:shooters[0] = new MachineGun();shooters[1] = new Revolver();shooters[2] = new HockeyPuck();shooters[3] = new OunceOfWhiskey();// A Shootable object can reference any item from the arrayShootable anyShootableItem;// The same object can to refer to a MachineGun OR a HockeyPuckanyShootableItem = shooters[0];anyShootableItem.beingShot();anyShootableItem = shooters[2];anyShootableItem.beingShot();// You can call beingShot on any item from the array without castingshooters[0].beingShot();shooters[1].beingShot();// Let's shoot each object for fun:for (Shootable s : shooters) { s.beingShot();}这是一个很好的相关问答。
