Demo.java:
import java.util.Scanner; //导入所需要的Scanner类 public class Demo { public static void main(String[] args) { Scanner sc = new Scanner(System.in); //实例化Scanner类 int a = sc.nextInt(); //从键盘接收一个整数类型 System.out.println(a); String b = sc.next(); //从键盘接收一个字符串类型 System.out.println(b); } }