Simple calculator using methods Ask Question Asked 8 years ago Modified 7 years, 8 months ago Viewed 16k times 6 I am a beginner to Java and am learning about using methods. The program starts by importing two classes from the Java library: The program defines a main method, which is the entry point for a Java program. How to draw a specific color with gpu shader. 0.45359237 is an example of this. (adsbygoogle = window.adsbygoogle || []).push({}); In thisprogramwe will calculate BMI. The best answers are voted up and rise to the top, Not the answer you're looking for? How do you understand the kWh that the power company charges you for? Why would a highly advanced society still engage in extensive agriculture? Learn more about Stack Overflow the company, and our products. The comments should explain what the code does and why it does what it does. New! In this example, we will learn how to do the calculation by using any of these two different approaches. The problem I'm having is I have absolutely no clue how to put the input from weight and height methods into the BMI method. The BMI is calculated by taking the weight in kilograms and dividing it by the square of height in meters. I am new to Java and I want to create a programme that asks a user for his or her height and weight, and calculate the corresponding BMI. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. */, /**
Simple Calculator using TCP in Java - GeeksforGeeks Calorie Counter -- We automatically calculate the calories in your foods, meals and recipes. I agree, however, it was the prompt in the sample output so I just went with it. There is only one class used in a very procedural way. Can YouTube (e.g.) He has 7 years of Software Development experience in AI, Web, Database, and Desktop technologies. In the constructor for the two subclasses, you will put the user prompt to get the height and weight information for the calculation of each type. Could you explain the condition in the while-loop? Example weight = 70 kg, height = 1.2 m BMI = 70 / (1.65*1.65) = BMI= 25.7 kg/m2 Healthy BMI range is :=> 18.5 kg/m 2 - 25 kg/m 2 Healthy weight for the height ranges :=> 50.4 kgs - 68.1 kgs You need to Lose 1.9 kgs to reach a BMI of 25 kg/m 2. It then calculates BMI and displays the result. Why do code answers tend to be given in Python when no language is specified in the prompt?
5 Alternatives To Body Mass Index (BMI) - The Calculator Site Thanks for contributing an answer to Code Review Stack Exchange! You shouldn't shorten variables names. It print the BMI when passed to the method name match with the name in "names" array, But it is risky because if the length of names array is bigger than weight or height it will throw ArrayIndexOutOfBoundsException but I assume that arrays have always properly length. Previous owner used an Excessive number of wall anchors. BMI between 25 and 29.9 is considered overweight. I only have a bit of time, so I am quickly going over the answers here but indeed, we've been told to solve these set of questions with try-catch and exceptions. The Body Mass Index BMI is a measurement of health based on height and weight. OverflowAI: Where Community & AI Come Together, How can I calculate BMI in Java Where the weight and height is an array, Behind the scenes with the folks building OverflowAI (Ep. The other method kind of works the same way. MathJax reference. Introduction In this post, we will look at a Simple Calculator Test case example for writing JUnit Tests. The Scanner is a dependency in each of the 3 methods and may be difficult to unit test around. Can Henzie blitz cards exiled with Atsushi? In this article we will learn how to create user defined exceptions (own exceptions) and how to use them in Java programs. Although you may not have learnt how to make other methods yet, it is a simple concept to learn and is easily found on numerous YouTube tutorials. - Rafa Sokalski Nov 7, 2018 at 7:54 on the how, which is already apparent in the code.
JUnit : Calculator Test Case Example - TestingDocs.com You could declare and initialize the arrays at once, i.e. I changed the method call to nextDouble so that it matches the type of the height variable. The following example program in Java calculates BMI value based on inputs in metric units. Will I enter my revised code above or should I create a new post as it's very different? 1 Answer Sorted by: 1 Its simple, Instead of Integer class use Double like : double weight=Double.parseDouble (wt); Also I advice you to do some validation with java script before submitting the form, or while parsing the data on server side, otherwise it can throw NumberFormatException Share Improve this answer Follow answered Jun 8, 2013 at 10:26 Your email address will not be published. You don't need to return anything in the methods if all you are doing is assigning values to your class fields and outputting info. The BMI has ranges which can be seen in the table below: Lets implement the BMI index calculator in Java: The code above will take inputs for the weight and height and then check the category of BMI. Good point, thank you. New! Do the 2.5th and 97.5th percentile of the theoretical sampling distribution of a statistic always contain the true population parameter? You would get an answer of 0.03673. Most of your comments now are just descriptive, i.e.
The Body Mass Index (BMI) is calculated using the formula weight / Math.pow (height, 2) * 703 Once the BMI value is calculated, the code checks the value to determine whether the user is underweight, normal, overweight, or obese. Is the DC-6 Supercharged? Create something like an Application class and keep the main method there! BMI = Weight in Kilograms / (Height in Meters * Height in Meters) A person's categorized as Underweight, Normal, Overweight, or Obese based on the BMI range: For example, let's calculate the BMI of an individual with a weight equal to 100kg (Kilograms) and a height equal to 1.524m (Meters). The following table shows the main BMI categories,BMI RangeCategory< 18.5Thinness18.5 25Normal25 30Overweight> 30Obese. My calculator is built with 5 methods. rubberman 1,355 bmi is okay, but I can't think of what cms, mtr stand for. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. android ui-design firebase android-application firebase-auth health-data firebase-realtime-database calories-tracker bmi-calculator. So in the upcoming else case you don't have to check if its equal or bigger 18.5, if this would not be true it would be smaler so the if case had taken action and the else won't.
It'll make your code much easier to read & much easier to refactor. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. ComputeBMI doesn't sound like a good class name to me. This import can be removed completely, since all classes from java.lang are imported implicitly. Double area float r float h return. This "TODO" comment is something you have to remove. This gives you the option to create many instances of BMI calculation objects or be able to attach the object to something like a person object. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Altogether, a very nice piece of work. As pointed out in some of the other answers, getting a double value from the keyboard can be abstracted into its own method to avoid code repetition: If you are on Java 7 and above, you should use try-with-resources for efficient handling of the underlying I/O resource: It's important to note that BMI is expressed in units of \$\frac{kg}{m^2}\$, so you should definitely display the units of measurement too. Its value is in a specific range for a healthy individual. The BMI is calculated by taking the weight in kilograms and dividing it by the square of height in meters. If there is possibility that the length of these arrays might be different I suggest to add some conditions, First it calculate the perfect weight and then it is compared to Person weight and print if the person should lose or gain some kg. Try to give descriptive names. It only takes a minute to sign up. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, First of all userBMI = weight[i]/height[j] * height[j]; is not a correct way to calculate BMI. BMI calculator finds whether the person is underweight, normal, overweight, or obese. I'm hoping to get a critical review of the code to identify any potential problems with it. Calculate the velocity of the body. It can be calculated by taking your weight in kilograms and dividing it by the square of your height in meters. Formula for Calculating BMI in Metric Units, BMI = (Weight in Kg) / (Height in Meters * Height in Meters) For example, weight = 75 kg, height = 1.5 m BMI = 75 / (1.5*1.5) = 33.33 Use MathJax to format equations. Connect and share knowledge within a single location that is structured and easy to search. Reading from the previous answer given by krasevich I too recommend you become familiar with using multiple methods rather than putting everything in the main method. That is, it's a good idea to create a doc comment for each method saying what it does, how it behaves if it gets an incorrect input and so on. Notify me of follow-up comments by email. I for example would would have a getInput methods to get the values for the user, a convertMeasurements method for converting the users input and finally a displayResult method. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); In this article we will learn what is event handling and how to handle events in Java programs using the delegation event model. This is my first program so no doubt I've made mistakes. He writes tutorials in Java, PHP, Python, GoLang, R, etc., to help beginners learn the field of Computer Science.
Java Program to Calculate BMI (Body Mass Index) - STechies Example: Enter the numbers: 2 2 Enter the operator (+,-,*,/) + The final result: 2.0 + 2.0 = 4.0 Approach Take two numbers using the Scanner class. * calculate BMI if weight/height in pounds/inches Many doctors and healthcare professionals use BMI as a guide when they are assessing the general health of patients. The trick in the second half of the while loop is that the expression, Thanks. Asking for help, clarification, or responding to other answers. Algebraically why must a single square root be done on all terms rather than individually? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. That's why I'd recommend to create a separate method for "step" of your computation: This way, you main method would just read the input, call these methods and print the result. For example,weight = 75 kg, height = 1.5 mBMI = 75 / (1.5*1.5) = 33.33@media(min-width:0px){#div-gpt-ad-knowprogram_com-medrectangle-3-0-asloaded{max-width:728px;width:728px!important;max-height:90px;height:90px!important}}if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'knowprogram_com-medrectangle-3','ezslot_5',121,'0','0'])};__ez_fad_position('div-gpt-ad-knowprogram_com-medrectangle-3-0'); Using the range of BMI, individuals are classified as underweight, normal or overweight. Find centralized, trusted content and collaborate around the technologies you use most. But I feel I am not on track, because the method when in use will be: So I have to find for example "frederik" in the array of names, and calculate his BMI. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.
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