package com.study.scanner;


import java.util.Scanner;


public class a1 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("使用NEXTLINE方式接受：");

        if(scanner.hasNextLine()){
            String str = scanner.nextLine();
            System.out.println("输出的内容为："+str);

        }
      scanner.close();
    }
}

        /*
         使用NEXTLINE方式接受：
          study english
           输出的内容为：study english

            Process finished with exit code 0


      */

package com.study.scanner;

import java.util.Scanner;

public class b1 {
    public static void main(String[] args) {

        //创建一个扫描器对象，用于接受键盘数据
        Scanner scanner = new Scanner(System.in);

        System.out.println("使用NEXT方式接受：");

        //判断用户有没有输入字符串
        if(scanner.hasNext() == true){
            //使用next方式接收
            String str = scanner.next();
            System.out.println("输出的内容为："+str);

        }
        //凡是属于IO流的类如果不关闭会一直占用资源，要养成好习惯用完就关闭
        scanner.close();
    }
}
       /*
       使用NEXT方式接受：
       study english
        输出的内容为：study

         Process finished with exit code 0

        */

package com.study.scanner;

import java.util.Scanner;

public class b2 {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        double sum = 0;
        int m = 0;

        while(scanner.hasNextDouble()  ){
            double x = scanner.nextDouble();

            m = m+1;
            sum = sum+x;
            System.out.println("你输入了第"+m+"个数据,然后当前结果是sum="+sum);

        }

        System.out.println(m+"个数的和为"+sum);
        System.out.println(m+"个数的平均值是"+(sum/m));


        scanner.close();
    }
}