# 泛型

介绍：

JDK5版本后引入，用处为编译阶段约束数据类型，并例行检查。

好处：

统一了数据类型，将运行期的错误提到了编译期。

注意：

泛型只能用引用数据类型

## 泛型类

<img src="https://gitee.com/icecat2233/picture/raw/master/20250428164803021.png" alt="image-20250428164753200" style="zoom:80%;" />

## 泛型方法

<img src="https://gitee.com/icecat2233/picture/raw/master/20250428164850644.png" alt="image-20250428164848721" style="zoom:67%;" />

## 泛型接口

<img src="https://gitee.com/icecat2233/picture/raw/master/20250428165135118.png" alt="image-20250428165133488" style="zoom: 67%;" />

## 泛型通配符

<img src="https://gitee.com/icecat2233/picture/raw/master/20250428165220144.png" alt="image-20250428165218560" style="zoom:67%;" />

## 总结

<img src="https://gitee.com/icecat2233/picture/raw/master/20250428165312329.png" alt="image-20250428165310376" style="zoom: 60%;" />