我的题解 | 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));
    }
    public static int typeConversion(double d){
        //装箱给Double
        Double dou = d;
        return dou.intValue();
    }
}

装箱给Double类型然后通过intValue方法转换成int