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Merged
pull merged 9 commits into from
Dec 2, 2020
Merged

[pull] master from Snailclimb:master #37

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a9bb5b0
Merge pull request #8 from Snailclimb/master
shahainloong Nov 30, 2020
6f73cee
Update synchronized在JDK1.6之后的底层优化.md
Dec 1, 2020
6d70d39
Update JVM垃圾回收.md
Snailclimb Dec 1, 2020
b74f3c8
Update README.md
Snailclimb Dec 1, 2020
58a8284
fix markdown errors
Xunzhuo Dec 1, 2020
44a0985
Merge pull request #1012 from shahainloong/master
Snailclimb Dec 2, 2020
b0decf1
Merge pull request #1013 from Xunzhuo/patch-5
Snailclimb Dec 2, 2020
a25ee0a
Update Java基础知识.md
Snailclimb Dec 2, 2020
1efc6e6
Merge branch 'master' of https://github.com/Snailclimb/JavaGuide
Snailclimb Dec 2, 2020
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2 changes: 1 addition & 1 deletion README.md
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## 一些闲话：

> 1. **介绍**：关于 JavaGuide 的相关介绍请看：[关于 JavaGuide 的一些说明](https://www.yuque.com/snailclimb/dr6cvl/mr44yt#vu3ok) 。PDF 版本请看：[完结撒花！JavaGuide 面试突击版来啦！](./docs/javaguide面试突击版.md) 。
> 1. **介绍**：关于 JavaGuide 的相关介绍请看：[关于 JavaGuide 的一些说明](https://www.yuque.com/snailclimb/dr6cvl/mr44yt) 。PDF 版本请看：[完结撒花！JavaGuide 面试突击版来啦！](./docs/javaguide面试突击版.md) 。
>2. **PDF版本** ： [《JavaGuide 面试突击版》PDF 版本](#公众号) 。
> 3. **面试专版** ：准备面试的小伙伴可以考虑面试专版：[《Java 面试进阶指南》](https://xiaozhuanlan.com/javainterview?rel=javaguide) ，欢迎加入[我的星球](https://wx.zsxq.com/dweb2/index/group/48418884588288)获取更多实用干货。
> 5. **联系我** ：如要进群或者请教问题，请[联系我](#联系我) （备注来自 Github。请直入问题，工作时间不回复）。
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2 changes: 0 additions & 2 deletions docs/java/basis/Java基础知识.md
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Expand Up @@ -965,8 +965,6 @@ public class Student {
**多态的特点:**

- 对象类型和引用类型之间具有继承（类）/实现（接口）的关系；
- 对象类型不可变，引用类型可变；
- 方法具有多态性，属性不具有多态性；
- 引用类型变量发出的方法调用的到底是哪个类中的方法，必须在程序运行期间才能确定；
- 多态不能调用“只在子类存在但在父类不存在”的方法；
- 如果子类重写了父类的方法，真正执行的是子类覆盖的方法，如果子类没有覆盖父类的方法，执行的是父类的方法。
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