creatorgeneric.java

来自「think in java 最新版本的源码」· Java 代码 · 共 26 行

//: generics/CreatorGeneric.java

abstract class GenericWithCreate<T> {
  final T element;
  GenericWithCreate() { element = create(); }
  abstract T create();
}

class X {}

class Creator extends GenericWithCreate<X> {
  X create() { return new X(); }
  void f() {
    System.out.println(element.getClass().getSimpleName());
  }
}	

public class CreatorGeneric {
  public static void main(String[] args) {
    Creator c = new Creator();
    c.f();
  }
} /* Output:
X
*///:~