接口作为成员变量类型 和 接口作为方法的参数和或返回值
接口作为成员变量类型
public class Hero { private String name; private SKill sKill; public Hero() { } public Hero(String name, SKill sKill) { this.name = name; this.sKill = sKill; } public String getName() { return name; } public void setName(String name) { this.name = name; } public SKill getsKill() { return sKill; } public void setsKill(SKill sKill) { this.sKill = sKill; } public void attack(){ System.out.println("我叫='" + name +",开始释放技能:"); sKill.use();//调用接口中的方法 System.out.println("释放技能完成"); } }
public class Tests { public static void main(String[] args) { Hero hero = new Hero(); hero.setName("赵云"); hero.setsKill(new SKill() { @Override public void use() { System.out.println("chua"); } }); hero.attack(); } }
public interface SKill { //释放技能的抽象方法 void use(); }
接口作为方法的参数和或返回值
public static void main(String[] args) { List<String> list = new ArrayList<>(); List<String> result = addName(list); for (int i = 0; i < result.size(); i++) { System.out.println(list.get(i)); } } public static List<String> addName(List<String> list){ list.add("张三"); list.add("李四"); list.add("王五"); list.add("赵六"); return list; }