public class Animal {
public void eat() {}
}
public class Dog extends Animal {
public void eat() {}
public void main(String[] args) {
Animal animal = new Animal();
Dog dog = (Dog) animal;
}
}
赋值Dog dog = (Dog) animal;
不会生成编译错误,但在运行时会生成ClassCastException
.为什么编译器不能检测到这个错误?