Make sure you don't mistake the boolean AND operator, &&(double ampersand) for the bitwise AND operator &(single ampersand). They are entirely different beasts.
确定你没有错误
逻辑和操作符&&和位操作符&，它们是完全不同。
记号名称
点法, 点符号
;
码;
字;件名;Make sure you don't mistake the boolean AND operator, &&(double ampersand) for the bitwise AND operator &(single ampersand). They are entirely different beasts.
确定你没有错误逻辑和操作符&&和位操作符&，它们是完全不同。
) （一个符号（ & ）在方法名称表明它回报参考 。
(An ampersand (&) before a method name indicates it returns by reference .
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