java - 乘以浮点值 "possible lossy conversion from double to float"

Question

我遇到这个问题，我必须将公里转换为英里。我是一名新手程序员，请多多包涵。

到目前为止，这是我的代码:

import java.util.Scanner;

public class problem1 {
    public static void main (String args[]) {
        float m;
        float km;

        Scanner input=new Scanner(System.in);

        System.out.print("Please enter a distance in kilometers:");
        km=input.nextFloat();
        m=km*0.621371;
        System.out.println("This is equal to: "+m);
    }
}

它给我一个错误提示:

Incompatible types:possible lossy conversion from double to float.

Answer 1

您正在尝试将 double 设置为 float 变量

要修复，更改此行

m=km*0.621371;

到

m=km*0.621371f;