rubberduck.java

来自「深入浅出设计模式」· Java 代码 · 共 13 行

package headfirst.combining.factory;

public class RubberDuck implements Quackable {
 
	public void quack() {
		System.out.println("Squeak");
	}
  
	public String toString() {
		return "Rubber Duck";
	}
}