package com.xu.scanner;

import java.util.Scanner;

public class Demo04 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);//Scanner是类，scanner是变量名；

        //从键盘接收数据
        int i=0;
        float f=0.0f;
        System.out.println("请输入整数：");
        //如果。。。。，那么
        if(scanner.hasNextInt()){
            i=scanner.nextInt();
            System.out.println("整数数据："+i);
        }else{
            System.out.println("输入的不是整数数据！");
        }

        System.out.println("请输入小数：");
        //如果。。。。，那么
        if(scanner.hasNextFloat()){
            f=scanner.nextFloat();
            System.out.println("小数数据："+f);
        }else{
            System.out.println("输入的不是小数数据！");
        }

"D:\Program Files\Java\jdk1.8.0_281\bin\java.exe" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 2021.1\lib\idea_rt.jar=64046:D:\Program Files\JetBrains\IntelliJ IDEA 2021.1\bin" -Dfile.encoding=UTF-8 -classpath "D:\Program Files\Java\jdk1.8.0_281\jre\lib\charsets.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\deploy.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\access-bridge-64.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\cldrdata.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\dnsns.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\jaccess.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\jfxrt.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\localedata.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\nashorn.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\sunec.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\sunjce_provider.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\sunmscapi.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\sunpkcs11.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\zipfs.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\javaws.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\jce.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\jfr.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\jfxswt.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\jsse.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\management-agent.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\plugin.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\resources.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\rt.jar;C:\Users\徐文昭\Desktop\JavaSE\out\production\基础语法" com.xu.scanner.Demo04
请输入整数：
1
整数数据：1
请输入小数：
0.1
小数数据：0.1

Process finished with exit code 0

        scanner.close();
    }
}