输入整数或者小数-2022-11-2

package scanner;

import java.util.Scanner;

public class Demo03 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        //从键盘接收数据
        int i= 0;
        float f=0.0F;
        System.out.println("请输入整数：");
        if (scanner.hasNextInt()){
            i = scanner.nextInt();
            System.out.println("输出整数为："+i);
        }else {
            System.out.println("输入的不是整数");
        }
        System.out.println("请输入小数：");
        if (scanner.hasNextFloat()){
            f=scanner.nextFloat();
            System.out.println("输出小鼠为："+f);
        }else {
            System.out.println("输入不是小数");
        }

        scanner.close();
    }
}

原文地址：http://www.cnblogs.com/RUI2022/p/16851925.html