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Scanner??????????

?Java????Scanner??????????????????????????????????????Scanner???????????????

??nextLine()????nextInt()??

???Scanner??nextInt()??????????????????????\n?????????nextLine()?????????????????null?????????????????????????nextInt()??????nextLine()???????

???????nextInt()?????nextLine()

????????????????????????????????

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Scanner sc = new Scanner(System.in);
int i = sc.nextInt();
sc.nextLine(); // ?????

??????????Scanner??

?????Scanner???????????????????????????

?????

Scanner sc1 = new Scanner(System.in);
Scanner sc2 = new Scanner(System.in);
int i = sc1.nextInt();
String s = sc2.nextLine();

????????nextLine()????

??????????????????????nextLine()???????????????????

?????

Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
int n = Integer.parseInt(s);

????????????

?????????????????

??????????

????????????????????????????

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Scanner sc = new Scanner(System.in);
char c = sc.next().charAt(0);

????????????

?????????????????????????????

?????

Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
char[] arr = s.toCharArray();
char c = arr[0];

?????????????????????????????