java处理输入，Scanner API

一时失言乱红尘 2022-02-23 01:56 259阅读 0赞

Java想要通过控制台进行输入的时候，首先要定义一个Scanner对象，并与标准输入流相关联：

Scanner in = new Scanner(System.in);

Scanner类定义在java.util包中，当使用的类不是在java基本的java.lang中的时候，需要使用import导入

import java.util.*;   //Scanner的库

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import java.util.*;   //Scanner的库
    public class InputTest { 
        public static void main(String[] args){ 
            Scanner in = new Scanner(System.in);
    
            System.out.println("What is your name");
            String name = in.nextLine();
            //String firstName = in.next();
    
            System.out.println("How old are you?");
            int age = in.nextInt();
    
            System.out.println("Hello, " + name + ". Next year, you'll be " + (age + 1));
            //可以直接在后面加上int类型的数据
        }
    }

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## Scanner API ##

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