package com.liu.scanner;

import java.util.Scanner;

public class Demo1 {
    public static void main(String[] args){
        //从键盘接收数据
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入");
        //判断是否有输入
        if (scanner.hasNextLine()){
            String str = scanner.nextLine();
            System.out.println("输入为："+str);

        }
        scanner.close();
    }

}

Scanner行接收