multiimplementation.java

来自「java编程思想(第四版)书中原代码 ,对初学者很有用的东西」· Java 代码 · 共 23 行

//: innerclasses/MultiImplementation.java
// With concrete or abstract classes, inner
// classes are the only way to produce the effect
// of "multiple implementation inheritance."
package innerclasses;

class D {}
abstract class E {}

class Z extends D {
  E makeE() { return new E() {}; }
}

public class MultiImplementation {
  static void takesD(D d) {}
  static void takesE(E e) {}
  public static void main(String[] args) {
    Z z = new Z();
    takesD(z);
    takesE(z.makeE());
  }
} ///:~