Java 输入输出流(输入数字、字符和字符串)

<1>输入数字

Scanner cin = new Scanner(System.in);int num = cin.nextInt();

<2>输入字符

char c = (char) new BufferedReader(new InputStreamReader(System.in).read());

<3>输入字符串

String s = new BufferedReader(new InputStreamReader(System.in)).readLine();