Creating the graphical user interfaces that let software break away from the command line can be a code-intensive and tedious process. The Java programming language gives developers a tool to simplify user interface development with the Swing library, a collection of classes that programmers use to create individual aspects of a GUI. One of these is the JDialog class, which produces a blank foundation for a dialog box.
When you develop an application that needs to perform a task such as saving data to a file, the way you perform the task is different on Windows than it is on a Mac because the computer's operating system controls access to files. Instead of developing two different applications, one for each operating system, some developers program a single application that will run on Windows or Mac using Java. A Windows system needs Java to run these applications.
In 1991, a Sun Microsystems team led by James Gosling developed Oak as a programming language for remote-control devices designed to control various types of consumer electronic equipment. Deals for the technology with electronics manufacturers fell through, though, and the developers changed the name of the language from Oak to Java because of copyright issues. Nevertheless, the popularity of the emerging Internet gave Java new life, and thousands of developers adopted Java as a Web programming language. As a result, Java and derivative platforms such as J2EE still form the backbone for countless websites and enterprise servers.
Drawing a speedometer in Java is something you can do either as a still image or as a moving image depending on your preferences. Draw a speedometer in Java with help from a computer science and media production specialist in this free video clip.
Installing Java from Ellipse is something you can do right from the main Java homepage. Install Java from Ellipse with help from a computer science and media production specialist in this free video clip.
BitLocker is a specific type of drive encryption that can help make your computer more secure. Enable BitLocker with help from a computer science and media production specialist in this free video clip.
Compressing a GIF lowers the file size while maintaining as much quality as possible. Learn about rotating GIF compression with help from a computer science and media production specialist in this free video clip.
Drawing a bull's-eye in Java is something you can do with your mouse or with a special type of attachment. Draw a bull's-eye in Java with help from a computer science and media production specialist in this free video clip.
Adding a combo box in Java is something that doesn't take more than a few quick moments of your time. Add a combo box in Java with help from a computer science and media production specialist in this free video clip.
Naming a hyperlink directly affects the way that link is returned in various search engines. Name a hyperlink with help from a computer science and media production specialist in this free video clip.
Building scheduled tasks in Java can help make part of the design process automated and therefore easier. Build scheduled tasks in Java with help from a computer science and media production specialist in this free video clip.
Coding a calculator in Java is something you will have to do with not one but two operands. Code a calculator with two operands in Java with help from a computer science and media production specialist in this free video clip.
Converting diacritics in Java is something that you can do by making use of a very specific command. Convert diacritics in Java with help from a computer science and media production specialist in this free video clip.
Drawing lines in Java doesn't require you to have years of experience in Web design. Draw lines in Java with help from a computer science and media production specialist in this free video clip.
A hyperlink is a block of text that you can use to redirect someone to a specific website of your choosing. Display a hyperlink with help from a computer science and media production specialist in this free video clip.
Dates and milliseconds need to be formatted in a very specific way in the Java programming language to allow a program to operate as it should. Learn the format for dates and milliseconds in Java with help from a software engineer with broad and extensive experience in this free video clip.
Declaring an array is something you have to do before allocation can take place in Java. Declare an array and allocate in Java with help from a software engineer with broad and extensive experience in this free video clip.
In computer science, Boolean types are often used to represent the truth values of logic, following the algorithmic insights of mathematician Alan Turing. Boolean logic, which employs the conjunction, disjunction and negation connectives familiar to programmers today, was actually developed many years before electronic computers hit the market. George Boole, the namesake of Boolean logic, discovered a way to express logical problems in a symbolic formula, thereby taking the study of logic out of philosophy and into the realm of mathematics. Those symbolic formulas, as expressed using Boolean connectives, would prove to be extremely useful for manipulating binary digits, or…
Pop-ups initiated by websites include advertisements, warnings and instructions. Pop-up menu selections and context sensitive help are examples of pop-ups which are typically activated by the user. Use the Java Jdialogue class to create pop-up dialog boxes and control the appearance of site pop-ups with the Popup_Layer.
The difference between a JavaServer Pages (JSP) file and a JavaServer Pages Fragment (JSPF) file is a matter of modularity. JSP files provide the mainstay of the Java code for the JSP framework to translate and run as a webpage, while JSPF files supplement JSP pages with code for specialized functions.
Just because you have the Java Development Kit (JDK) installed on your system does not mean you will automatically be able to compile Java source code with different development environments or build tools. If these tools are not correctly configured with the location of the JDK, you will get error messages that end with "JAVA_HOME does not point to the JDK." You will need to configure the tool with the JDK's directory address.
Parsing a string means analyzing it for specific occurrences of characters or words. You can parse a string in Java by creating a delimiter -- a set of characters called "tokens" that identify where to break up the string -- and then calling the Java "split" function as a parser. This function uses the delimiter to break up the string and save the results in a string array. The split function lets you break the string at every occurrence of a delimiter, or, alternatively, you can specify a maximum number of breaks. Learn the ins and out of the syntax,…
Hibernate is a free tool you can use for programming in Java that allows you to map from an object-oriented domain model to a relational database. What this means is that Hibernate serves as a query and retrieval tool that allows you to move information from one type of database to another. You can also use Hibernate in conjunction with Java's scroll function -- allowing you to scroll through the mountains of data to find exactly what you're looking for.
JSP or Java Server Pages are the Java-language equivalent of Microsoft's Active Server Pages and PHP Web applications. JSP files combine Java and HTML code that is compiled and run as Java servlets. The term “JSPF” refers to Java Server Page fragment files, which are not complete JSP pages and cannot be compiled without errors. A JSP file can include one or more child JSP or JSPF files into a single file that is compiled and run as a single servlet.
In early days of the World Wide Web, Web pages were static documents that served the same information to everyone each time they were viewed. The Java programming language provided a way to make websites more interactive through the use of Java applets, JSP or Java Server Pages and Java Common Gateway Interface, or CGI, programs called servlets. Servlets and JSP pages function like PHP, Python or Perl scripts, but have the added security and performance of the Java Virtual Machine.
JavaServer Faces (JSF) built upon Oracle's earlier JavaServer Pages (JSP) technology. Whereas JSP focused on using Java code to create Web-based interfaces, JSF takes a more modular approach to mirror cascading style sheet (CSS) syntax. JSF is a newer framework than JSP, but it still grew out of the JSP project. Consequently, you can execute JSF code segments through the JSP framework by including the code in a JSP Fragment (JSPF) file and importing it into your main JSP source code with an "include" directive.
Efficient data structures optimize a program's performance by making it easier for the program to find the data that it needs. Binary search trees are one of the most efficient data structures for searching through an ordered data set. Whether your data structure is an organized binary-search tree or a standard binary tree, you can find the tree's height in Java through a simple recursive function.
Math problems that ask your students to find a maximum or optimal value within a set of equations can be a challenge for students: Instead of just solving a simple equation, they are actually using math to answer a real world question. If you know enough Java to program a simple desktop application with a graphical user interface, then you know enough to create an online applet to help students practice these problems.
Unlike Java's more specialized input objects, an InputStream object lets you work with byte-level data from a given resource. It is, however, only capable of reading in a static file of data. If you want to use data from another running Java project in an InputStream object, you have to use a network framework to retrieve the data before storing it in the InputStream.
It is sometimes necessary to use the WebLogic.ejbc JAR compiler instead of the newer WebLogic.appc one, for example when creating Java packages for older versions of the BEA WebLogic Server software. Using the WebLogic.ejbc compiler also allows you to more efficiently debug your Java applications because unlike WebLogic.appc, it automatically outputs a complete list of encountered errors after the compiling process is complete. You can use WebLogic.ejbc instead of WebLogic.appc by using the Windows command-line prompt utility.
Java-based Web servers like Tomcat and Jetty use keytool, a Java utility, to create public and private keys and associate certificates with these key pairs. Certificates are used as digital signatures, providing secure authentication when connecting clients to a server. Keytool generates keystores, which hold security certificates. Keystores can use either the P12 or JKS format. P12 files are almost universally supported, but the format is extremely complex. You can use keytool to convert P12 to JKS, a simpler format only accessible through Java applications.
Small programs are fine for teaching students the basics of the Java programming language, but are not representative of real programming work. This is why students who are getting ready to graduate from computer science programs have to complete mega projects: large scale projects that produce something that is both novel and genuinely useful.
By default, Java is unable to work with Flash SWF files. SWF files are Adobe Flash files that contain multimedia, vector graphics and ActionScript. However, a pack of functions is available on the Web that extends the functionality of Java and enables you to work with Flash files. For example, it can help you parse the SWF file and read all text. You can then use the text in your other Java functions. All you have to do is download the source files and link to them in your Java application.
Developed by Sun Microsystems, JDBC stands for Java Database Connectivity, a Java-based interface that enables any Java program to connect to a relational database to save and archive data. Many computer programmers have developed JDBC abstractions to prevent users from having to write and understand the sometimes complex coding that operates the interface program.
The Java programming language uses the System class to retrieve input from and send messages to the software user. The System.in class retrieves the information, and the System.out class sends messages back to the software user. This is the main difference between the two class objects.
When programming in Java, obscure warning messages may appear during compilation. Determining the source of these errors can become a problem if you are not aware of the context of the error or how to address it. In the case of symbol handling, Java programs that use objects and inheritance can present a difficult debugging situation. However, it is important to remember the rules of class inheritance in Java, so that an error such as a "symbol cannot be found" can be traced effectively.
When developing Web applications by using JAXB, a collection of libraries designed to help you develop XML-based programs, you might sometimes receive an error message warning you of a sealing violation. After displaying this error message, your application will stop running. You can fix that problem by following a specific procedure.
Dynamically filling a combobox is a function you can use to create drop-down lists in the Java programming language. You can fill a combobox located in a JTable using the Java loop function. The loop iterates based on the amount of items you want to add to the Java combobox. Each iteration adds a new item to the combobox, and you can use data imported from a file or hard-coded in the Java file.
In object-oriented programming languages, map objects represent data structures containing a series of key-value pairs. In Java, this goes for all derivatives of the Map class, such as HashMap and TreeMap. These classes also contain methods allowing the programmer to access these pairs as a sort of collection, over which the program can iterate to perform operations or print to the screen. By using the entrySet method of a TreeMap inside a for-each loop, you can iterate over each key-value pair in the map.
Most introductory Java programming courses don't cover the Java heap. After all, when the class assignments are only a few lines of code, what is the need for discussing physical memory management? The heap can, however, become a very big deal when a large GlassFish Java server project is suddenly giving heap errors to developers using the NetBeans integrated development environment (IDE). This problem is easily solved by more efficient programming or changing configuration settings.
Applets aren't the only way web developers can use Java code to create websites. Servlets function as individual objects on a JavaServer Pages (JSP) site. However, servlets encounter the same issues as other Java programs when concurrent tasks modify the same variable out of sequence. This is because of the software model of servlets, but there are ways to manage multiple processes within the servlet to prevent these issues.
Android Java Programming works through a concept of message passing, in which threads of execution in a program pass messages of executable code between one another in order to accomplish specific tasks or maintain communication between different parts of the application. The "Handler" class, along with its "MessageQueue" class, organize, execute, and dispatch messages and executable objects through the code. Each thread in an Android program can have a Handler class for the sole purpose of handling data and messages.
Apache's Tapestry framework provides you with dynamic cache of programming libraries and classes that you can reference in the development of your Java web applications. When adding an expression to events in your application's source code, prefixes can be used to tell Tapestry how to evaluate the expression. Prefixes are generally used in Tapestry to configure components of the framework, but they can be useful in Tapestry's URL rewriting script as well. If you need to chain several URL rewrites together, you can use the "after:" prefix to set the order of your rules.
JCreator is a type of Java editing program you install on your desktop to create Java applications. The JCreator can be used to create Android apps, because Android uses Java to create mobile device apps. To get started with JCreator, you create a "Hello World" app that targets the Android version you want to use. To use JCreator, you must specify the project type as "Android."
The Java "setPixel" and "getPixel" functions let you flip pixels within an image. You can also use the functions to change pixels for an image you create using the Java programming language. These two functions help you manipulate images, so you can automate image functions for users and display the results on a Web page or on a desktop form.
Oracle Corporation released JDK 1.6 in 2006 as an upgrade from Java 1.5, which was released in 2004. Codenamed Mustang and primarily known as Java Platform Standard Edition 6 or Java SE 6, JDK 1.6, it brought with it a plethora of improvements, including but not limited to faster performance, better security patches, upgraded Java libraries, the introduction of several new modules and many improvements to the graphical user interface.
When it comes to software development, it is a good thing to be a lazy programmer. If a programmer reuses code that he, or someone else, has already written, he can spend more time working on code for new functions. Developers can incorporate existing code libraries with either static or dynamic linking. Java uses dynamic linking by default, but programmers can statically link their own files.
Computers do not multitask: they perform one task at a time in such rapid succession that it gives the illusion of parallel activity. In computer science terms, these tasks are called "processes." If you are seeing a Java error message about "PID: 236," it means that one of the Java programs running on your computer has crashed. This specific number identifies which program crashed, but is useful only to programmers for resolving the issue.
Java is used for both Web and desktop applications, but you must use scalable code to avoid slowness issues that devalue user experience. Scalability is the term used to describe the ability of your code to handle more users and faster servers when the company grows and requires more resources from your application.
Java offers a few objects to process input and output. One of these comes from the "buffered" class of objects, the BufferedWriter. The BufferedWriter includes a text buffer that handles programmer output rather than printing directly to the system. As with other classes, the BufferedWriter comes with a default constructor and with custom constructors. These constructors allow the programmer to use a default buffer size or supply one of her own, depending on the application.
The Java programming language serves as the foundation for many business and server applications, due to its portability and popularity. That being so, these applications must contend with the functions of the Java language and its execution environment: the Java Virtual Machine. Knowing how to manage the settings of the JVM becomes crucial when dealing with high-volume Java business applications, such as WebSphere Process Server.
Java source code represents a portable and flexible programming language for business, Web, and handheld application development. This benefit of portability comes in no small part thanks to the Java Virtual Machine. However, the JVM also represents a tool that programmers must manage and maintain in order to get the most out of Java applications. Particularly, memory consumption and heap allocation in the JVM are details that programmers would do well to consider.
Applets are created in the Java programming language and can be included in a Web page. When the user opens the Web page in a Java-enabled browser, the applet's code is transferred to the operating system and executed by the Java Virtual Machine. If you have a Graphical User Interface created in Java, you can make an applet out of it and allow people to use it when accessing your website.
The Oracle Corporation provides a software development environment it calls Application Development Framework, or ADF. The Java-based ADF gives software developers tools to create sophisticated business applications for desktop PC, Web and mobile device environments. Software objects called components make up part of ADF, bundling Oracle database fields along with editing and validation rules that work with the fields.
Axis2, developed and maintained by Apache, is a core engine for Web services that allows you to add Web services interfaces to your Web applications. It can also act as a Web server application. If you want to create a Web service client, you can do it manually or create a Web Service Description Language definition to describe the messages clients should send and expect to receive. In case you are working in a Java environment, Axis has a built-in tool that you can use to convert WSDL to Java.
The Java language is provided using the JSP syntax, which connects to a database and retrieves the data in a "ResultSet" object. You loop through the results and add each item to a JSP drop-down box. JSP uses standard HTML for tags and browser content, and then you use Java to create the dynamic content. The Java is compiled and run before the user sees the content, so your database procedure is hidden from the user with only the drop-down content shown from the results.
The Java programming language offers many built-in functions that allow programmers to accomplish basic tasks in everyday programming. However, these functions are sometimes not readily available to programmers for implementation. Using built-in functions to solve problems can aid production, but does not help beginning programmers learn to solve basic tasks or understand how underlying functions work. For example, while Java contains a built-in string splitting function, learning how to build one from scratch can show how to traverse and manipulate strings, concatenate strings and return arrays from methods.
The Java Network Launching Program (JNLP) lets you create Web services in your Java program. You must add the JNLP libraries to your project and include the libraries in your source code. Java has an "include" directive that lets you launch and open the files in your Java custom software. Use this to include statements to use the libraries in any Java program.
The JSP language uses Java to set up dynamic pages for your users. You can use the language to send an email based on a specific date. The automated email is sent to the user only if the condition is met, so you can use the feature to send email based on login date, birthday or payment date.
Java Server Pages (JSP) allow you to create dynamic pages using the Java language. JSP is more convenient for developers new to Web development who are used to the Java language. JSP uses tags and operators similar to standard PHP and ASP languages, but the code syntax is based on the Java language.
When a Java application needs to store a vast array of data, developers sometimes decide to create a JTable that follows the TableModel specification. By default, JTables can only be updated by the thread that generated them. However, by editing the source code of the applet, you can instruct your program to update a JTable from any other thread.
According to the official Oracle website, JavaServer Pages technology is a "simplified, fast way to create dynamic web content." It is completely compatible with HTML documents, allowing you to change an HTML file's file extension to JSP and a JSP file's file extension to HTML without any issues. You can use this compatibility to convert a JSP Web page to an HTML Web page in Dreamweaver using the application's "Find and Replace" function.
Concatenating two strings lets you append one string to the end of another using the common struts 2 design method. Struts standardizes coding, so you can stick to practices in your code that make it easier for other programmers to read and edit your code. The "+" character combines strings in your JSP code.
The JLabel control sets content on your desktop forms, which are JFrame objects in Java. The label is programmatically created, and you can then set up dynamic content to display in the label. The process is necessary in Java applications, enabling you to provide your users with dynamic content based on their feedback as they work with your application.
When developing Java applications, it can be useful to have the ability to assign a JApplet to a specific JPanel. While a JApplet is a special class of applets, a JPanel is a container that is used to display media files. Assigning a JApplet to a JPanel allows you to manipulate the files displayed by the panel, in ways such as applying a rotation effect to a picture, or allowing the user to control video playback. You can assign a JApplet to a JPanel by editing the source code of your application.
Lambda functions are a tool for making Java more efficient. Java is an object-oriented language. Java programmers use functions to model real-world objects, such as cars, people, buildings, so that program users can work with, play with or experiment on the models. Java functions often become large and complex, but Lambda expressions simplify them.
The RGB, or red-green-blue, color space is the standard for many computer graphics. RGB represents a color as a red, green and blue value, that produce the color when mixed as light. YCbCr is an alternate color space composed of a luminance signal Y and two chromiance signals Cb and Cr. YCbCr may offer advantages over RGB when it comes to image or video compression and encoding. A series of mathematical calculations in Java can easily convert and RGB value to YCrCb.
The "AIML" Chatterbot language lets you incorporate AIM bots in your Java applications. Use these bots to market a website, and to create a fun experience for users. A user can message the bot with AIM and the bot returns answers to the user's questions. You can add links or just incorporate the bot software in your chat software.
The "finish" function in an Android app closes the application. As an Android app developer, you must create a button for your users so they can close the app when they're finished with it. Create the button in your Java XML file and use the Java source code to trigger the code that closes the app.
If you write Java applets for the Web, you may one day need to give users the ability to manipulate numbers that contain the letter "E." Floating-point numbers, often used in business and scientific calculations, can consist of digits followed by the letter "E" and another number that represents an exponent. The value 5.12E3, for instance, represents 512,000 because the 3 in the number tells the computer to multiply the number by 10 to the third power. Using the correct Java methods, you can modify your applet so that it can prompt users for two floating-point numbers and process them…
In the Java programming language, the "keyDown" event detects each time a user presses a key. You can use this event handler in a Java application that runs in the background on a computer, allowing you to detect keystrokes outside of the Java program itself. You must set up the keyDown event and code to determine the computer’s response when the user presses a key.
The Java JDBC library lets you connect to a database where you can query the tables. You use inner joins to find foreign keys, which are the fields contained in one table that links to another table. For instance, the "customerid" field in a customer table links to the foreign "customerid" key in the order table, so you can link customers to their respective orders.
The Java "Transformer" class converts the data you contain in your XML applications to an XLST format: a style sheet that sets up the layout for your XML data. The Transformer class is beneficial for Web developers who need to use the two formats together to create Web layouts. The Transformer class handles the format conversion, so you just need to initialize the class and set up the default attribute to remove it from the layout.
Android developers use Java to create the layout XML and the functionality of an Android app. You use Java to read a 2D array in an XML file, which contains the settings and stored values you use in an Android app. Java includes functions and features that let you read the Android's XML variables in order to import them into users' screens.
A multihomed host is a computer or other hardware that maintains more than one IP address. Having multiple IP addresses isn't unusual because the address relates to the Internet interface, not the machine: A computer that has both an Ethernet and a Wi-Fi Internet connection has a different IP address for each interface. Using a multihomed computer can affect how Java Virtual Machines interact with each other.
To manually install Android apps such as Hello Mapview, you must store the package file to the Android's "sdcard" and install the package using the Android "adb" install command line utility. You use this feature to manually install the Hello Mapview app for testing the app when you change the source code or download the package from a third-party source.
Java socket objects are used to represent connections between two machines. However, a program using sockets can become bogged down if the program waits for a connection to establish. In this case, you can split off a separate thread of execution that waits for a connection while the main program still runs. By extending this, you can use the separate thread to monitor the sockets for connections and handle them, only notifying the program when a connection is made or another significant even happens.
Oracle makes it easy for Java developers to incorporate modern cryptography methods into their applications. This allows programmers to either write programs to help users encrypt their data using these methods, or to add layers of security to their own applications. All that Java developers need to learn are the concepts behind modern encryption methods and how to use Oracle's Java Cryptography Architecture, known as JCA.
The art of debugging has become as essential to computer programming as the actual programming itself. As programming projects become more advanced, the need to good debugging necessarily becomes more advanced. Fortunately, the Java programming language comes with a variety of techniques to facilitate proper debugging, through the standard debugger, to examining core files, to promoting good coding practice.
Each Java interpreter installation includes a cache folder. The cache folder contains temporary files includes zip files downloaded using Java software. You can find servlet zip files and extract them to a folder on your hard drive, so you don't delete and clear the servlet from your computer when you clear the Java cache. You can find the servlet by opening the cache folder on your Windows computer.
The Java programming language, at its core, contains the basic data types and functionality to build many different data structures and representations. For example, the histogram is a representation of data occurrence within a range of values. While Java contains an advanced class to build histograms from image data, you can also create a basic histogram using any range of data. By using multidimensional arrays and some strategic "for" loops, you can print a basic histogram to the user's console.
A histogram represents the occurrence frequency of given values over a range of data. Often, histograms are used to display color values inside digital images. However, histograms are valuable for other applications as well. The Java programming language does contain a Histogram class for image processing, but you can also create a basic histogram class that displays value occurrence through a graphical representation and the asterisk ("*") symbol.
Tesseract optical character recognition libraries offer developers a method to scan documents and text to an image. You use the Tesseract libraries to store images of documents that you no longer need in hard copy. You use Tesseract libraries in Java by looping through each character and writing the character to a file. To use the libraries, you must include the Java namespace for the OCR functions.
Threads in the Java programming language on the Android platform represent separate lines of execution in a program. Essentially, multiple threads can run in the same program, allowing different lines of execution to occur at the same time in the same program. However, difficulty can arise when trying to schedule threads. Managing when and how Threads execute can prove challenging. While you cannot explicitly give a time to execute a thread, you can specify an object wrapper to delay the execution of a thread through the "sleep" command.
The Java programming language supports various data types that contain collections of data. The simplest, an "array," stores a series of related data values under the same variable name. Other data types are the "map" and the "hash map," which map collections of data to keywords. For example, you can combine an array and a hash map by creating a hash map object containing a series of string arrays and then mapping those arrays to string keywords.
Not all errors Java programmers encounter are results of the code they write. Some errors, such as the incompatible class change error, come from the way that the Java compiler created bytecode files for the Java Virtual Machine (JVM) to execute. This error happens when programmers rebuild one class file without rebuilding the other files in the application.
The Java language can be used to develop rich, interactive applications on both the Web and native applications. The JTextField class handles string input from a form embedded within a Java application. Your user may enter an integer in the text field that needs to be converted from a string before programmatic use.
Classes and the objects instantiated from them handle the data and operations of all Java programs. You may sometimes want to use the functionality of a class in your program, but without necessarily defining a complete class in addition to your main program. In this case, you can define an anonymous class that only exists within the scope of the method it is defined in. Instantiating an object from an anonymous class occurs at the moment you define the anonymous class.
PHP and Java are two popular programming languages for use in software delivered over the Web or embedded in Web pages. PHP in particular is the native language of Web development platforms such as WordPress and Drupal. PHP and Java are handled differently by the Web servers hosting such programming, making the choice of languages an important concern when considering the design of high-traffic websites.
Java applications model code components as objects, with each object having an area of responsibility. Objects provide methods to carry out their responsibilities. Some methods in Java are implemented by all possible objects, including strings. The Java framework allows developers to use certain types of data storage structure, some of which use hash-code values to store items. A hash-code value uses a code to refer to a specific object, allowing the collection class to implement efficient methods for storing multiple objects within the program. Java code can calculate hash-code values for all objects, including strings, which are immutable.
With JSmooth you can turn your Java applications into Windows executable files. The developers only distribute the program as source code, so you will need to compile the code before you can use JSmooth. Compiling JSmooth requires getting a GNU development environment for Windows and running GNU/Linux commands.
Java ServerPages give Java programmers a way to embed Java functionality into their Web design. JSPs allow programmers to perform normal programming functions, such as mathematical calculation, branching statements and method calls on an existing Java server while integrating with HTML. For example, you can create a hidden field in HTML, which does not display to the user but stores information about the form session, and use it in a JSP page.
A Java frame is the main form or window used to display the elements for your NetBeans program. NetBeans' graphical interface helps you create and debug Java programs. To connect frames, you create a new frame within the first frame, and set the new frame to "visible" so that it displays on the user's desktop. The feature provides your program with a multiple windows interface.
Surf the Web long enough, and you may see an applet in your browser. Java applets are miniature programs that run inside Web pages. They use older Web technology and are less powerful than Silverlight or ASP.NET applications. Applets, however, can still make your browsing experience more productive and fun.