用 Java 制作一个 BMI 计算器

Sheeraz Gul 2022年6月2日
用 Java 制作一个 BMI 计算器

BMI 代表体重指数。本教程演示了如何在 Java 中创建 BMI 计算器。

用 Java 制作一个 BMI 计算器

体重指数 BMI 是基于身高和体重的健康指标。BMI 的计算方法是将体重(公斤)除以身高(米)的平方。

计算 BMI 的公式是:

BMI = (Weight in Kilograms) / (Height in Meters * Height in Meters)

BMI 的范围如下表所示:

BMI 范围 类别
> 30 肥胖
25 - 30 超重
18.5 - 25 正常
< 18.5 体重不足

让我们用 Java 实现 BMI 指数计算器:

package delftstack;

import java.util.Scanner;

public class Calculate_BMI {

   // method to check BMI
    public static String BMIChecker(double Weight, double Height) {

        // calculate the BMI
        double BMI = Weight / ( Height * Height) ;

        // check the range of BMI
        if(BMI < 18.5)
            return "Underweight";
        else if(BMI < 25)
            return "Normal";
        else if(BMI < 30)
            return "Overweight";
        else
            return "Obese";
    }

    public static void main(String[] args) {

        double Weight = 0.0f;
        double Height = 0.0f;
        String BMI_Result = null;

        Scanner scan_input = new Scanner(System.in);
        System.out.print("Please enter the weight in Kgs: ");
        Weight = scan_input.nextDouble();
        System.out.print("Pleae enter the height in meters: ");
        Height = scan_input.nextDouble();


        BMI_Result = BMIChecker( Weight, Height );

        System.out.println(BMI_Result);

        scan_input.close();
    }
}

上面的代码将输入体重和身高,然后检查 BMI 的类别。见输出:

Please enter the weight in Kgs: 79
Please enter the height in meters: 1.86
Normal
Author: Sheeraz Gul
Sheeraz Gul avatar Sheeraz Gul avatar

Sheeraz is a Doctorate fellow in Computer Science at Northwestern Polytechnical University, Xian, China. He has 7 years of Software Development experience in AI, Web, Database, and Desktop technologies. He writes tutorials in Java, PHP, Python, GoLang, R, etc., to help beginners learn the field of Computer Science.

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