Example6_5.java
interface SpeakHello { void speakHello(); } class Chinese implements SpeakHello { public void speakHello() { System.out.println("中国人习惯问候语:你好,吃饭了吗? "); } } class English implements SpeakHello { public void speakHello() { System.out.println("英国人习惯问候语:你好,天气不错 "); } } class KindHello { public void lookHello(SpeakHello hello) { //接口类型参数 hello.speakHello(); //接口回调 } } public class Example6_5 { public static void main(String args[]) { KindHello kindHello=new KindHello(); kindHello.lookHello(new Chinese()); kindHello.lookHello(new English()); } }
时间: 2024-10-16 00:53:00