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Declaration and initialisation of variables
Variables example from a Well House Consultants training course
More on Variables [link]

This example is described in the following article(s):
   • Turning bright delegates into bright and knowledgable ones - [link]

Source code: Somevars.java Module: J703
public class Somevars {
/* All about this class - who wrote, what version, etc) */

/* Use / - * - * comments for Javadoc. File should contain
        a) Code
        b) User / higher level programmer documents via Javadoc
        c) Comments for the author maintainer at this level */


public static void main(String [] args) {
        /* Some comments about the method - what it does, etc */

        float weight = 76.5f; // Declare AND initialise in one

        float height ; // Declare but do NOT initialise
        height = 1.78f; // Initiialise

        float bmi; // No need to initiailse because ...
                                // Good idea to declare at top??

/* Calculations - using "BODMAS"
        Brackets
        Order (i.e. raise to power)
        Division and Multiplication (left to right)
        Addition and Subtraction (also left to right) */


        bmi = weight / (height * height); // First use is setting

        System.out.print("BMI is ");
        System.out.print(bmi);
        System.out.println();

        }

}

/* Sample output

munchkin:jj11 grahamellis$ java Somevars
BMI is 24.14468
munchkin:jj11 grahamellis$

*/

Learn about this subject
This module and example are covered on the following public courses:
 * Learning to Program in Java
 * Java Bootcamp
 * Java Programming for the Web
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering Java and associated technologies are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "Variables" training module. You'll find a description of the topic and some other closely related examples on the "Variables" module index page.

Full description of the source code
The complete module that describes this example is available for download under our Open Training Notes License from our sister site http://www.training-notes.co.uk.

Other resources
• Our Solutions centre provides a number of longer technical articles.
• Our Opentalk forum archive provides a question and answer centre.
The Horse's mouth provides a daily tip or thought.
• Further resources are available via the resources centre.
• All of these resources can be searched through through our search engine
• And there's a global index here.

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This web site is written and maintained by Well House Consultants.

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This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

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Past attendees on our training courses are welcome to use individual examples in the course of their programming, but must check the examples they use to ensure that they are suitable for their job. Remember that some of our examples show you how not to do things - check in your notes. Well House Consultants take no responsibility for the suitability of these example programs to customer's needs.

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