import java.util.Scanner; //设计一个方法, //将一个小于2147483647的double类型变量 //以截断取整方式转化为int类型 public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); double d = sc.nextDouble(); System.out.println(typeConversion(d)); } public static int typeConversion(double d) { return (int) d; } }