BMI Calculator Java Program [ 2024 ]

BMI Calculator Java Program

In this post, we will write a simple Java program called BMI Calculator to calculate a person’s BMI index. The program takes weight and height as input.

BMI Formula

BMI Index = $\LARGE \frac{weight ( kg)}{(height(m))^{2}}$

IDE Setup

We will use Eclipse IDE in this tutorial. Some steps and instructions to create a Java application on Eclipse IDE:

Create Java Project in Eclipse

https://www.testingdocs.com/create-a-new-java-project-in-eclipse/

Create Java Package in Eclipse

https://www.testingdocs.com/create-java-package-in-eclipse-ide/

Create Java Class in Eclipse

https://www.testingdocs.com/create-a-new-java-class-in-a-project/

Run Java Project in Eclipse

https://www.testingdocs.com/run-java-project-in-eclipse/

Java Program

/**************************************************
 * BMICalculator.java
 * @program : 
 * @web : www.TestingDocs.com
 * @author : 
 * @version : 1.0
 **************************************************/

import java.util.Scanner;

public class BMICalculator {

 public static void main(String[] args) throws Exception {
 System.out.print("Please enter weight in kg:= ");
 Scanner keyboard = new Scanner(System.in);
 double weight = keyboard.nextDouble();
 System.out.print("Please enter height in meters:= ");
 double height = keyboard.nextDouble();

 double bmiIndex = calculateBMI(weight,height);

 System.out.println("The BMI index is: "+ bmiIndex);

 if(bmiIndex < 18.5) {
 System.out.println("Underweight");
 }else if (bmiIndex < 25) {
 System.out.println("Normal");
 }else if (bmiIndex < 30) {
 System.out.println("Overweight");
 }else {
 System.out.println("Obese");
 }
 }


 /**************************************************
 * Method to calculate BMI Index
 **************************************************/
 private static double calculateBMI(double weight,double height) {
 return (weight)/(height*height);
 }
}