java IO流简单测试

import java.util.Scanner;

public class demo01 {
    public static void main(String[] args) {
      
    Scanner scanner = new Scanner(System.in);
    System.out.println("使用next方式接收：");
    if (scanner.hasNext()){
        String str = scanner.next();
        System.out.println("输出的内容为"+str);
    }
    scanner.close(); //不关掉，会有相应的警告
    }
    }
}