Java - Variables

Java module J703

Variables

Exercises, examples and other material relating to training module J703. This topic is presented on public courses Learning to Program in Java, Java Bootcamp, Java Programming for the Web

Learning to Program in Java - training course - Writing Java programs for newcomers to programming.

Learning to Program in Java - Writing Java programs for newcomers to programming. This course introduces you to programming in the Java programming language. ...

http://www.wellho.net/course/sjfull.html [course]

Java Programming for the Web - training course - Learn to write server- or client-side applications in Java.

Java Programming for the Web - Learn to write server- or client-side applications in Java. This course introduces you to the Java programming language, ...

http://www.wellho.net/course/jpfull.html [course]

Java Bootcamp - training course - An intense course on Java programming, Servlets and JSPs

Java Bootcamp - An intense course on Java programming, Servlets and JSPs This course introduces you to the Java programming language, and its Internet ...

http://www.wellho.net/course/bjfull.html [course]

Question on division (Java) - Also Perl, PHP, Python ...

Q: What's the difference between % and /? A: / returns the result of a division % returns the remainder when you do a division. Divide 18 by 7 you ...

http://www.wellho.net/mouth/1448_Que ... thon-.html [short article]

Conversion and coercion in Java

The accuracy and conversion of primitive arithmetic variables in Java is something that I'm questioned on regularly. Ideally in Java, you'll perform ...

http://www.wellho.net/mouth/127_Conv ... -Java.html [short article]

Easy user interaction class

import java.util.*; import java.io.*; /** Reading from the keyboard or a file This is an example used on our Java Programming courses to provide early ...

http://www.wellho.net/resources/ex.php4?item=j703/WellHouseInput.java [code sample]

Simple use of variables - adding

public class Addup { public static void main(String [] args) { int rovers; int city; int total; ...

http://www.wellho.net/resources/ex.php4?item=j703/Addup.java [code sample]

Information that's produced by one Java statement and used in later ones is held in variables. In Java, variables must be declared before they are used, and you must specify the type of information they contain. Operations can be performed on variables, and casting can be used to convert information of one type to another.

This topic is presented on public courses Learning to Program in Java, Java Bootcamp, Java Programming for the Web

Examples from our training material

Add2.java	Adding and declaring variables in a single statement
Addup.java	Simple use of variables - adding
Av2.java	Average - fails at compile
Av3.java	Average - this one works
Av3b.java	An alternative working example
Average.java	Averages - how NOT to (try to) do it
Cost.java	Reading a cost from the user
WellHouseInput.java	Easy user interaction class

Pictures

On site training in Oxford

Background information

This module is available under an Open Training Notes License for free download from http://www.training-notes.co.uk.

Topics covered in this module

First use of variables in Java.
Variable names.
Declaring and initialising variables.
Primitive types.
Type casting and conversion.
Reading input from the user.

Complete learning

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