目录前言1. 异或（XOR）运算的定义2. 在 Java 中的异或运算符3. 基本用法4. 异或运算的特性4.1. 自反性：4.2. 单位元：4.3. 交换律：4.4. 结合律：4.5. 逆元：5.
I\'m making a shopping list app which basically uploads your shopping list to a php file and also downloads all the updates anyone else has made to the list.
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