equals hashCode ==

1. equals VS. ==

2. equals VS. hashCode

3. 重写equals方法

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https://baike.baidu.com/item/hashcode/7482507?fr=aladdin

https://www.cnblogs.com/whgk/p/6071617.html

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https://www.cnblogs.com/keyi/p/7119825.html

重写equals方法

https://www.cnblogs.com/silence-hust/p/4558701.html

https://www.cnblogs.com/printN/p/6007821.html

https://blog.csdn.net/linbiubiubiu/article/details/80335233

equals和hashcode

https://www.cnblogs.com/skywang12345/p/3324958.html

https://blog.csdn.net/wonad12/article/details/78958411