# 类和类型

## aop

### template

```java
public class Main {
    static class Human {
        String label;
        public String getLabel() {
            return "Human";
        }
    }

    static class Employee extends Human{
        public String getLabel() {
            return "$code";
        }
    }
    public static void main(String[] args) throws IOException {
        Human joe = new Employee();
        System.out.println(joe);
    }
}
```

我们有两个类型：

```java
class Human {
    String label;
    public String getLabel() {
        return "Human";
    }
}

class Employee  extends Human{
    public String getLabel() {
        return "Employee";
    }
}
```

现在我们有对象

```java
Human joe = new Employe(...)
```

调用 `joe.getLable()` 的时候，返回的是？

## 答案

Employee

## 选项

### A

Human

### B

HumanEmployee

### C

Main$Employee@7a81197d

### D

Main$Human@7a81197d