Sacnner类

package com.tiedandan.base;

import java.util.Scanner;

public class Scanneruse {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("使用next方式接收");
        //判断用户有没有输入字符串
        if(scanner.hasNext()){
            String str = scanner.next();
            System.out.println("输出的内容为："+str);
        }
        //io流即输入输出流用完记得关闭，否则一直占用资源
        scanner.close();
    }
}
https://www.bilibili.com/video/BV12J41137hu?p=33