java 面向接口编程

public interface Advertisement { //接口
public void showAdvertisement();
public String getCorpName();
}

public class AdvertisementBoard { //负责创建广告牌
public void show(Advertisement adver) {
System.out.println(adver.getCorpName()+"的广告词如下:");
adver.showAdvertisement(); //接口回调
}
}

public class WhiteCloudCorp implements Advertisement { //PhilipsCorp实现Avertisement接口
public void showAdvertisement(){
System.out.println("@@@@@@@@@@@@@@@@@@@@@@");
System.out.printf("飞机中的战斗机，哎yes!\n");
System.out.println("@@@@@@@@@@@@@@@@@@@@@@");
}
public String getCorpName() {
return "白云有限公司" ;
}
}

public class BlackLandCorp implements Advertisement {
public void showAdvertisement(){
System.out.println("**************");
System.out.printf("劳动是爹\n土地是妈\n");
System.out.println("**************");
}
public String getCorpName() {
return "黑土集团" ;
}
}

public class Example6_6 {
public static void main(String args[]) {
AdvertisementBoard board = new AdvertisementBoard();
board.show(new BlackLandCorp());
board.show(new WhiteCloudCorp());
}
}