classcasts.java

来自「Thinking in JAVA第四版源代码」· Java 代码 · 共 14 行

//: typeinfo/ClassCasts.java

class Building {}
class House extends Building {}

public class ClassCasts {
  public static void main(String[] args) {
    Building b = new House();
    Class<House> houseType = House.class;
    House h = houseType.cast(b);
    h = (House)b; // ... or just do this.
  }
} ///:~