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                ### JAVA基礎知識 * **移位運算符** ``` << : 左移運算符,num << 1 相當于num乘以2 >> : 右移運算符,num >> 1 相當于num除以2 ``` * **JAVA三種注釋** ``` // 單行注釋 /* 代碼塊注釋 */ /** 文檔注釋 */ ``` * **雙等號==的含義** 基本數據類型之間應用雙等號,比較的是他們的數值;復合數據類型(類)之間應用雙等號,比較的是他們在內存中的存放地址 * **i++語義**:實際對應“讀取-修改-寫入”操作序列
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