However, at this point we are forced to delve into some of the details of XML coding to accomplish this. It is likely that in the near future, we will have graphical tools available to facilitate quick and easy construction of these system files. Reference: For more information about XML see. (In describing each XML-based file below, we present a simple example implementation which we will use in the section 25.3 application.) With the exception of content files and search files, each file is expected to be in the XML format. To use JavaHelp in an application we need to prepare a set of files described below. This capability, along with the more comprehensive internationalization support provided by Java 2, is very powerful, currently under major development, and lie beyond the scope if this text. Note: JavaHelp also provides a way to deliver multi-lingual help depending on the currently selected locale. ![]() Help content is expected to be in the form of HTML documents, enabling rich display capabilities and greatly simplifying the delivery of help files across the Internet. The right split pane component is an editor pane used to display the content of the currently selected help topic. The left split pane component is a tabbed pane containing a table of contents, help index, and search navigation facilities. The toolbar contains two buttons allowing navigation between help topics that have been visited previously in a forward/backward style. This viewer contains a toolbar in its northern region and a split pane in the center. JavaHelp includes a standard Swing-based help viewer illustrated in figure 25.1 below. Note: You will need to download and install the JavaHelp API before running the examples in this chapter. The 1.0 release of this API is available for download from the JavaSoft web site (see ). For this reason JavaSoft has developed the JavaHelp API: a full-featured, platform-independent, extensible help system that gives developers and authors the ability to efficiently incorporate an online help system into applications (both network and stand-alone), applets, JavaBean components, HTML pages, operating systems, and devices. As Java apps evolve into more extensive and sophisticated solutions, they require a robust, uniform, and effective mechanism for providing help to these users. However, the commercial success of any modern software project greatly depends on the quality and availability of the help information provided to end users. If (input.length != correctPassword.Most software developers do not look forward to spending time documenting and explaining their product. Private static boolean isPasswordCorrect(char input) Here is the code that creates and sets up the password field: You can find the entire code for this program in Use secure authentication methods in production systems. The password "bugaboo" is an example only. Alternatively, to compile and run the example yourself, consult the example index. ![]() ![]() Java™ Web Start ( download JDK 7 or later). ![]() Here is a picture of a demo that opens a small window and prompts the user to type in a password.Ĭlick the Launch button to run PasswordDemo using Like an ordinary text field, a password field fires anĪction event when the user indicates that text entry is complete, for example by pressing the Enter button. As another security precaution, a password field stores its value as an array of characters, rather than as a string. Instead, the field displays a character different from the one typed, such as an asterisk '*'. For security reasons, a password field does not show the characters that the user types. JPasswordField class, a subclass of JTextField, provides specialized text fields for password entry.
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