Scanner交互1

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：");
        //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！");
        }
        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！");

        }
        scanner.close();
    }
}