ordinaryarguments.java

来自「think in java 最新版本的源码」· Java 代码 · 共 27 行

//: generics/OrdinaryArguments.java

class OrdinarySetter {
  void set(Base base) {
    System.out.println("OrdinarySetter.set(Base)");
  }
}

class DerivedSetter extends OrdinarySetter {
  void set(Derived derived) {
    System.out.println("DerivedSetter.set(Derived)");
  }
}	

public class OrdinaryArguments {
  public static void main(String[] args) {
    Base base = new Base();
    Derived derived = new Derived();
    DerivedSetter ds = new DerivedSetter();
    ds.set(derived);
    ds.set(base); // Compiles: overloaded, not overridden!
  }
} /* Output:
DerivedSetter.set(Derived)
OrdinarySetter.set(Base)
*///:~