scanner4

package li;

import java.util.Scanner;

public class Demo4 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
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！");
    }
}

}