By John Cowell BSc(Hons), MPhil, PhD (auth.)
If you're a new programmer or a Java programmer relocating to Java 2 then this is often the ebook for you! It bargains: a whole advent to Java 2; describes the language and lots of of its type libraries; indicates how they're used; describes the most important suggestions of item orientation with plenty of examples of the way to use the speculation. This publication will assist you reap the benefits of Java 2's new beneficial properties (such because the summary windowing toolkit and the Swing sessions) for developing graphical consumer interfaces. John Cowell explains the right way to use Swing elements to alter the appear and feel of your Java functions in order that they appear like home windows, Mac or Motif purposes. sunlight Microsystems Java 2 (formerly known as the Java improvement equipment 1.2 - JDK 1.2) is a huge leap forward within the development of Java right into a robust mature language for writing either functions and applets. subject matters lined during this booklet contain: the Java language; the summary windowing toolkit; the recent Java Swing parts; dealing with part, keyboard and mouse occasions; polymorphism and inheritance; animation and multithreading; dealing with exceptions; utilizing documents. Essential Java 2 - fast is designed for pro builders or scholars who have to study the utmost within the minimal time. you are going to increase functions and applets quickly, studying every thing you must write Java functions and applets fast with Java.
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Additional resources for Essential Java 2 fast : How to develop applications and applets with Java 2
Else statements All of the programs we have looked at consist of lines of code that are run one after another, without any looping or conditional statements. All programming languages need to be able to repeat some parts of the program more than once. Java has three types ofloop: for, while and do. The If... else statement In common with most programming languages the if statement provides a way for your programs to make decisions. The basic form of the if statement is: if (condition) statement; If the condition is met, the following statement is executed.
The checkSpeed method displays a message if the speed instance variable is less than 200 MHz. When the application is run the main method is executed. This creates an instance of the FastEnough class called myComputer. Since myComputer is an object of class FastEnough it has copies of the speed and memory instance variables and can use the checkSpeed method of the FastEnough class. The instance variable speed is assigned a value of 150 for the myComputer object. ' character and then the name of the instance variable(speed).
Public class DisplayingNameApplet extends Applet ( public String firstParam. drawString("Hello "+ firstParam. 20. drawString("Hello "+ secondParam. 20. 50); } } 53 7 The Graphics, Color and Font classes Introduction One of the great benefits of an object-oriented language is that libraries of classes can be created and used to add functionality to applications and applets. The Java Application Programming Interface (API) includes hundreds of classes. Since these classes have been thoroughly tested it is always better to use them rather than creating your own classes.