适配器模式(Adapter)

适配器模式

 public class Current {public void use220V(){System.out.println("使用220V电压");}}public class Adapter extends Current {private Current current;public Adapter(Current current) {this.current=current;}public void use18V(){System.out.println("使用适配器");this.current.use220V();}}public class Test {public static void main(String[] args) {Adapter adapter = new Adapter(new Current());adapter.use18V();}}