http://local.developer.com/Java-s1178.html Developer.com offers daily news, articles, and tutorials for professional involved in the development of applications and other technical solutions. Daily coverage includes articles, tutorials, news and other resources related to all facets of development. 120 en-us Articles@DirectoryM.com Articles@DirectoryM.com http://local.developer.com/Java-s1178.html Developer.com offers daily news, articles, and tutorials for professional involved in the development of applications and other technical solutions. Daily coverage includes articles, tutorials, news and other resources related to all facets of development. http://local.developer.com/App_Themes/templateDarkBlueWAdSense_en-US/Images/logo.gif Java is an Object Oriented Programming (OOP) language created by James Gosling of Sun Microsystems. JavaScript was created by the fine people at Netscape. JavaScript is a distant cousin of Java. http://local.developer.com/Java_vs_JavaScript_So_what_is_the_difference_between_Java_and_JavaScript_anyway-a1162273.html http://local.developer.com/Java_vs_JavaScript_So_what_is_the_difference_between_Java_and_JavaScript_anyway-a1162273.html Beyond HTML Tutorials http://local.developer.com/So_You_Want_A_Java_Clock_Huh-a1162272.html http://local.developer.com/So_You_Want_A_Java_Clock_Huh-a1162272.html What do you get when you use the == operator to compare references to literal String objects that contain the same value? Show off your smarts or learn a thing or two in our quiz series. http://local.developer.com/Test_Your_Java_Knowledge_Using_Operators_and_Making_Assignments_Part_6-a1162230.html http://local.developer.com/Test_Your_Java_Knowledge_Using_Operators_and_Making_Assignments_Part_6-a1162230.html Baldwin introduces a very useful program that displays information about any Java component, including inheritance, interfaces, properties, events, and methods. You can expand the program to provide even more information if you wish to do so. http://local.developer.com/Swing_from_A_to_Z_Analyzing_Swing_Components_Part_1_Concepts-a1162229.html http://local.developer.com/Swing_from_A_to_Z_Analyzing_Swing_Components_Part_1_Concepts-a1162229.html We take a birds-eye view of the Java Cryptography Architecture, both within the Java Development Kit and the Java Cryptology Extension. http://local.developer.com/An_Overview_of_Cryptography_in_Java_Part_1_Random_Numbers_and_Cryptographic_Security_Providers-a1162226.html http://local.developer.com/An_Overview_of_Cryptography_in_Java_Part_1_Random_Numbers_and_Cryptographic_Security_Providers-a1162226.html Java has been historically lucky in the open source field. Sun has been committed to community and industry participation since Java's inception, and by opening up source code Sun has helped foster innovation in areas such as security. http://local.developer.com/Thoughts_on_Java_and_Open_Source_Security-a1162225.html http://local.developer.com/Thoughts_on_Java_and_Open_Source_Security-a1162225.html We examine the structure of a scientific program more closely. We'll define a few scientific OOP design patterns in Java, and we'll give you a short style guide. http://local.developer.com/Scientific_Computing_in_Java_Part_2_Writing_Scientific_Programs_in_Java-a1162224.html http://local.developer.com/Scientific_Computing_in_Java_Part_2_Writing_Scientific_Programs_in_Java-a1162224.html What is the bitwise exclusive or of 5 and 7? Show off your smarts or learn a thing or two in our quiz series. http://local.developer.com/Test_Your_Java_Knowledge_Using_Operators_and_Making_Assignments_Part_5-a1162223.html http://local.developer.com/Test_Your_Java_Knowledge_Using_Operators_and_Making_Assignments_Part_5-a1162223.html A lot of new applications are being written today in Java. Companies also have a vested interest in maintaining their legacy systems. So there is a need for Java applications to communicate with legacy systems through messages that those systems can interpret properly. http://local.developer.com/Formatting_Messages_in_Java_to_Communicate_with_Legacy_Systems_Part_1-a1161962.html http://local.developer.com/Formatting_Messages_in_Java_to_Communicate_with_Legacy_Systems_Part_1-a1161962.html We continue our series on Java cryptography with a look at setting up a provider of security services. http://local.developer.com/An_Overview_of_Cryptography_in_Java_Part_3_Writing_Your_Own_Provider-a1161961.html http://local.developer.com/An_Overview_of_Cryptography_in_Java_Part_3_Writing_Your_Own_Provider-a1161961.html This column is about the worldwide Java developer community. Indeed, it is exciting to remember that this community extends as far as the Web can carry it. http://local.developer.com/Views_from_Abroad_Really_Running_Anywhere-a1161960.html http://local.developer.com/Views_from_Abroad_Really_Running_Anywhere-a1161960.html The idea behind the cryptography extension is to remove the programmer from the math and complexity involved in algorithms, and instead utilize provider classes that take care of the implementation. Gutschmidt continues his cryptography overview in this second installment. http://local.developer.com/An_Overview_of_Cryptography_in_Java_Part_2_Provider_History-a1161955.html http://local.developer.com/An_Overview_of_Cryptography_in_Java_Part_2_Provider_History-a1161955.html True or false? Friendly or package access applies to all classes in the current working directory that are not declared to be public, private, or protected? Show off your smarts or learn a thing or two in our quiz series. http://local.developer.com/Test_Your_Java_Knowledge_Using_Modifiers_Part_2-a1161950.html http://local.developer.com/Test_Your_Java_Knowledge_Using_Modifiers_Part_2-a1161950.html We begin a new column on useful Java classes by looking at Timer and TimerTask, which facilitate execution of code at a predetermined time or during specified time intervals. http://local.developer.com/Class_of_the_Month_Control_Event_Executions_with_the_New_Timer_Class-a1161949.html http://local.developer.com/Class_of_the_Month_Control_Event_Executions_with_the_New_Timer_Class-a1161949.html Baldwin discusses the use of J2EE as a middle-tier server in a multi-tier environment. He explains some of the benefits of the multi-tier environment in general, and the use of J2EE in particular. He discusses the general concept of a container, describes the services provided by the EJB container, and discusses how the EJB container fits into the grand scheme of things in J2EE. http://local.developer.com/Enterprise_JavaBeans_Middle_Tier_Servers_and_J2EE-a1161948.html http://local.developer.com/Enterprise_JavaBeans_Middle_Tier_Servers_and_J2EE-a1161948.html Here's the code for building a simple color progress bar in Java. http://local.developer.com/User_Code_A_Simple_Color_Progress_Bar-a1161947.html http://local.developer.com/User_Code_A_Simple_Color_Progress_Bar-a1161947.html This user has a neat little trick to change JLabel typefaces. http://local.developer.com/User_Code_Giving_JLabel_a_Different_Face-a1161808.html http://local.developer.com/User_Code_Giving_JLabel_a_Different_Face-a1161808.html Reasonable security begins with a reasonable security policy and continues by focusing on some of Java's weak links, namely memory management and decompilation. http://local.developer.com/Securing_Java_Code_Part_4_Decompilers-a1161807.html http://local.developer.com/Securing_Java_Code_Part_4_Decompilers-a1161807.html Baldwin explains that the core collection interfaces in the Java Collections Framework allow collections to be manipulated without regard for how they are implemented. http://local.developer.com/Data_Structures_in_Java_Part_4_Purpose_of_Implementations_and_Algorithms-a1161805.html http://local.developer.com/Data_Structures_in_Java_Part_4_Purpose_of_Implementations_and_Algorithms-a1161805.html Java development for mobile devices is relatively new, so a book on wireless Java has to keep pace with a shifting landscape. Does Java 2 Micro Edition manage the trick? http://local.developer.com/Book_Review_A_Starting_Point_for_Wireless_Java-a1161802.html http://local.developer.com/Book_Review_A_Starting_Point_for_Wireless_Java-a1161802.html This Java user solved the problem of identifying the constructors, methods, and fields of a Java class by creating an application to help him do just that. http://local.developer.com/User_Code_Method_Finder-a1161801.html http://local.developer.com/User_Code_Method_Finder-a1161801.html This is the third lesson in a miniseries designed to help you learn the essential features of object-oriented data structures in Java using the Collections Framework. http://local.developer.com/Data_Structures_in_Java_Part_3_Purpose_of_Framework_Interfaces-a1161800.html http://local.developer.com/Data_Structures_in_Java_Part_3_Purpose_of_Framework_Interfaces-a1161800.html User Russell Thackston has a thing about NullPointerExceptions. Here's how he deals with them. http://local.developer.com/User_Code_Avoiding_Those_Pesky_NullPointerExceptions-a1161798.html http://local.developer.com/User_Code_Avoiding_Those_Pesky_NullPointerExceptions-a1161798.html This open-source embedded scripting language from the U.K. encourages you to insert scripts in the middle of XML data files, making it quite a valuable tool. http://local.developer.com/Views_from_Abroad_Simkin_A_New_Breed_of_Scripting_Language-a1161796.html http://local.developer.com/Views_from_Abroad_Simkin_A_New_Breed_of_Scripting_Language-a1161796.html The author builds an application that can access a COM object created using VC++6.0 ATL and then call this COM-server object via a pure Java client. http://local.developer.com/Access_COM_Via_Java_A_Tutorial-a1161794.html http://local.developer.com/Access_COM_Via_Java_A_Tutorial-a1161794.html Developers need to assume that eventually their source code will be decompiled and scrutinized. There are, however, ways to sanitize source code after a program runs, and steps to make it expensive, time consuming, and extremely difficult to unravel. http://local.developer.com/Securing_Java_Code_Part_3-a1161793.html http://local.developer.com/Securing_Java_Code_Part_3-a1161793.html Baldwin explains some of the details surrounding the use of a Java collection for creating data structures. He also discusses the interfaces and the concrete implementations in the Java Collections Framework. http://local.developer.com/Data_Structures_in_Java_Part_2_What_Is_a_Collection-a1161791.html http://local.developer.com/Data_Structures_in_Java_Part_2_What_Is_a_Collection-a1161791.html A new P2P technology called JXTA has received a lot of hyperbole lately. Columnist Fox would like to clear things up a bit. http://local.developer.com/The_Juxtaposition_Between_Hype_and_Reality-a1161789.html http://local.developer.com/The_Juxtaposition_Between_Hype_and_Reality-a1161789.html Baldwin introduces you to the Java Collections Framework. Once you learn how to use the framework, it is unlikely that you will need to reinvent common data structures, search algorithms, or sorting algorithms again, because those capabilities are neatly packaged within the framework. http://local.developer.com/Data_Structures_in_Java_Part_1_Getting_Started-a1161787.html http://local.developer.com/Data_Structures_in_Java_Part_1_Getting_Started-a1161787.html User Giacomo Veneri follows up his color progress bar with a new twist. http://local.developer.com/User_Code_Multi_Progress_Bar-a1161786.html http://local.developer.com/User_Code_Multi_Progress_Bar-a1161786.html We begin another investigation into the advanced scientific and engineering uses of Java by looking at a technique that underlies much of modern modeling and simulation. http://local.developer.com/Java_in_Science_Data_Interpolation_and_Extrapolation_Using_Numerical_Methods_of_Polynomial_Fittings_Part_1-a1161784.html http://local.developer.com/Java_in_Science_Data_Interpolation_and_Extrapolation_Using_Numerical_Methods_of_Polynomial_Fittings_Part_1-a1161784.html There are times when the resource your Java application needs is available from a Web site. You can see it by pointing your browser to its URL. You just need to have your application access it. The java.net.HttpURLConnection class will help you do just that. http://local.developer.com/Class_of_the_Month_Making_HTTP_Connections-a1161781.html http://local.developer.com/Class_of_the_Month_Making_HTTP_Connections-a1161781.html This tutorial focuses on how to make use of some basic JDK classes and image-manipulation techniques to create an image puzzle game. It's intended to give you a taste of how fun programming can be and a starting point leading to more serious applications. http://local.developer.com/Getting_Creative_with_Images_Using_Java_A_Simple_Puzzle-a1161779.html http://local.developer.com/Getting_Creative_with_Images_Using_Java_A_Simple_Puzzle-a1161779.html In this installment in our series, we further examine the elements that should be part of a secure Java code policy, including such safeguards as compartmentilization and cryptography. http://local.developer.com/Securing_Java_Code_Part_2-a1161774.html http://local.developer.com/Securing_Java_Code_Part_2-a1161774.html Baldwin previously introduced you to a very useful program that displays information about any Java component. In this lesson, he explains the code that gets, sorts, and displays information about component interfaces. http://local.developer.com/Swing_from_A_to_Z_Analyzing_Swing_Components_Part_5_Interfaces-a1161773.html http://local.developer.com/Swing_from_A_to_Z_Analyzing_Swing_Components_Part_5_Interfaces-a1161773.html Jetty is popular with developers for its small memory footprint, its ability to work "right out of the box," and its friendly design. http://local.developer.com/Views_from_Abroad_Close_Up_On_Jetty-a1161770.html http://local.developer.com/Views_from_Abroad_Close_Up_On_Jetty-a1161770.html We conclude this tutorial with with more on the BuildMsg.processRequest() and BuildMsg.getMsg() methods, and generating an EBCDIC byte stream using "cp500" encoding. http://local.developer.com/Formatting_Messages_in_Java_to_Communicate_with_Legacy_Systems_Part_2-a1161769.html http://local.developer.com/Formatting_Messages_in_Java_to_Communicate_with_Legacy_Systems_Part_2-a1161769.html Columnist Fox tackles the ever-mounting irrational gloom affecting the industry from a Java developer's viewpoint. http://local.developer.com/Is_the_Anti_Hype_Hyper_Critical-a1161766.html http://local.developer.com/Is_the_Anti_Hype_Hyper_Critical-a1161766.html Baldwin has previously introduced you to a very useful program that displays information about any Java component, including inheritance, interfaces, properties, events, and methods. In this lesson, Baldwin explains the code that gets and displays inheritance information about a component. http://local.developer.com/Swing_from_A_to_Z_Analyzing_Swing_Components_Part_4_Inheritance-a1161765.html http://local.developer.com/Swing_from_A_to_Z_Analyzing_Swing_Components_Part_4_Inheritance-a1161765.html Jato is an open-source effort focusing on XML/Java conversion which allows the developer to focus strictly on the mapping without paying too much attention to implementation. http://local.developer.com/Automating_XMLJava_mapping_with_Jato-a1161763.html http://local.developer.com/Automating_XMLJava_mapping_with_Jato-a1161763.html People have the notion that security holes are created by criminals and hackers to compromise systems. This is untrue. In almost all cases the holes exist and are just exploited. http://local.developer.com/Securing_Java_Code_Part_1-a1161759.html http://local.developer.com/Securing_Java_Code_Part_1-a1161759.html In this lesson, Baldwin explains the constructor for the GUI using JFrame, JPanel, JTextArea, JScrollPane, JTextField, JButton, and JLabel components. http://local.developer.com/Swing_from_A_to_Z_Analyzing_Swing_Components_Part_3_Construction-a1161758.html http://local.developer.com/Swing_from_A_to_Z_Analyzing_Swing_Components_Part_3_Construction-a1161758.html Gamelan contributor Paul Book offers up the code for a JComboBox that sets the date. http://local.developer.com/User_Code_JComboBox-a1161755.html http://local.developer.com/User_Code_JComboBox-a1161755.html Baldwin presents a sample enterprise bean program that you can use to hone your skills in the deployment of EJBs into the J2EE server. This bean makes use of helper classes, requiring you to take that into account in the deployment process. http://local.developer.com/Enterprise_JavaBeans_Helper_Classes-a1161754.html http://local.developer.com/Enterprise_JavaBeans_Helper_Classes-a1161754.html Subclasses of Calendar interpret a date according to the rules of a specific calendar system. One such subclass is java.util.GregorianCalendar. You can use the methods and properties of GregorianCalendar for many of your date and time calculations and comparisons. http://local.developer.com/Class_of_the_Month_GregorianCalendar-a1161752.html http://local.developer.com/Class_of_the_Month_GregorianCalendar-a1161752.html Gamelan contributor Ramesh Babu offers up the code for building a color calculator in Java. http://local.developer.com/User_Code_A_Color_Calculator-a1161750.html http://local.developer.com/User_Code_A_Color_Calculator-a1161750.html With the new JCE 1.2.1, customizing securitymanager may be necessary in order to properly implement your provider. Sun also asks that providers carefully document services for users, and although JCE 1.2.1 hallmarks availability of these cryptography tools outside of the United States, implementing them in this way adds a layer of complexity. http://local.developer.com/An_Overview_of_Cryptography_in_Java_Part_4_Permissions_Documentation_and_Export_Issues-a1161748.html http://local.developer.com/An_Overview_of_Cryptography_in_Java_Part_4_Permissions_Documentation_and_Export_Issues-a1161748.html Programming in Java doesn't have to be dull and boring. In fact, it's possible to have a lot of fun while programming in Java. This is the first lesson in a miniseries that will concentrate on having fun while programming in Java. http://local.developer.com/Fun_with_Java_Sprite_Animation_Part_1-a1161548.html http://local.developer.com/Fun_with_Java_Sprite_Animation_Part_1-a1161548.html We continue our look at the upgraded Enterprise JavaBeans spec with details on its support of entity bean persistence and management of relationships among entity beans. http://local.developer.com/A_Peek_at_EJB_2_Part_2-a1161547.html http://local.developer.com/A_Peek_at_EJB_2_Part_2-a1161547.html Our columnist finds perspective in understanding how software development has become an integral part of essential services in the modern world. http://local.developer.com/Hypewatch_Where_Developers_Fit_In-a1161546.html http://local.developer.com/Hypewatch_Where_Developers_Fit_In-a1161546.html