题解 | 类型转换

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double d = scanner.nextDouble();
        System.out.println(Main.typeConversion(d));
        scanner.close();
    }
    public static int typeConversion(double d){
        //write your code here......
        return (int)d;
    }
}

1. double的范围比int大，要强转，也就是（int) d
2. 题目说double类型变量小于2147483647也就是int的最大值,所以不会溢出
3. scanner记得关流