Scanner scan =new Scanner(System.in); Scanner scan =new Scanner(System.in); String s =scan.nextLine(” “); //輸入一個字符串 Scanner scan =new Scanner(System.in); String s =scan.nextDouble(” “);//輸入一個浮點型數 Scanner scan =new Scanner(System.in); String s =scan.nextInt(” “);//輸入一個整形數