Java_Day02.2

關鍵字keywords：被Java語言賦予特殊含義，有專門用途，都是小寫 數據類型：class, interface, enum, byte, short, int, long, float, double, char, boolean, void 流程控制：if, else, switch, case, default, while, do, for, break, continue, return 訪問權限：private, protected, public 定義類、函數、變量修飾符：ab...