Like learning a foreign language, you have to write original code if you want to master Java deeply. Make your examples fun, and life-like. They'll stick with you.

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Learn how to save thumbnail data to a database to render our pictures to a nice HTML gallery page and finish the proof of concept for our Google Photos clone.

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Write expressions like (myBigDecimalMap[ObjectKey] * 5 > 20) in Java... Manifold makes that happen. Expressions like "5 mph * 3 hr" produces distance!

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Do you ever pull your hair out in frustration, asking why isn't this part of the Java API? Thanks to Manifold, you can solve that problem for everyone.

There's only one weekend left until we get to EclipseCon 2009 - and I can't wait! You'll have already seen what talks I'm looking forward to. We'll have lots of coverage of the conference here at EclipseZone. Another really easy way to follow the conference is by using Twitter to follow EclipseCon people. All you need to do to find these people is head over to the EclipseCon Birds Nest. There's four different ways to partipate - as a standard follower, as a speaker, an exhibitor or an attendee. There's going to be a Twitter monitor in the lounge area for people to watch what people are saying about the conference. Twittervision - how cool is that?! Ian Skerrett is also planning a tweetup on Sunday night. Over the last few weeks I've become a Twitter addict myself - it's a great way to keep in touch with the latest goings on. (If you want to follow me, just go to my profile as dzonejames.) In other EclipseCon news, Sun Microsystems have become a Gold Sponsor for the conference. They will be showing their Eclipse support for JavaFX, GlassFish and Solaris. It's good to see Sun there. If you haven't registered yet, there's still time for advance registration, ending today. Make sure to use your DZone coupon to get 10% off, using the DZONE10 code. Otherwise you can register on site. So, if you want to stay in the loop for EclipseCon, become part of the Birds Nest , follow me around on Twitter and keep visiting EclipseZone.

Get ready for high quality video on the screens of your life. Sun has entered into a multi-year agreement with On2 Technologies, to provide immersive media and content on your JavaFX applications. "The JavaFX runtime environment is designed from the ground up to support high fidelity media, empowering content authors to deliver media-rich content and applications across all the screens of your life. On2 shares Sun's vision of driving video convergence across desktops and mobile devices and we look forward to working with On2 to deliver this capability as part of the JavaFX family of products," said Rich Green, executive vice president, Software at Sun. RIAs written in JavaFX will be able to use the On2 video codecs from Fall 2008, at the same time as the 1.0 release of JavaFX desktop (an early access release is expected in July). We'll need to wait until Spring 2009 for JavaFX Mobile and JavaFX TV. The same high resolution video will run across all of these platforms. There's no doubt that JavaFX is in the spotlight for JavaONE 2008, and Sun seems intent on putting weight behind the technology so that it can rival the more established RIA offerings for Adobe and Microsoft. A new javafx.com site has been launched during the conference with tutorials, demos from the keynotes, downloads and getting started guides. Previously I've commented that the hype around JavaFX was too little, too late. The TrueMotion video codecs are a welcome and necessary addition to JavaFX. Perhaps the emphasis on JavaFX is worth it - after all, RIAs are the buzzword of the moment. Is this a sign of good things to come for JavaFX?

This Pet Catalog app explains a web application that uses JSF 2.0, Java EE 6, GlassFish and MySQL. I took this example GlassFish and MySQL, Part 2: Building a CRUD Web Application With Data Persistence and modified it to use some of the new features of JSF 2.0 and Java EE 6. Download the sample code Explanation of the usage of JSF 2.0 and Java EE 6 in a sample Store Catalog Application The image below shows the Catalog Listing page, which allows a user to page through a list of items in a store. JSF 2.0 Facelets XHTML instead of JSP For JSF 2.0, Facelets XHTML is the preferred way to declare JSF Web Pages. JSP is supported for backwards compatibility, but not all JSF 2.0 features will be available for views using JSP as their page declaration language. JSF 2.0 Facelets has some nice features like templating (similar in functionality to Tiles) and composite components, which I'm not going to discuss here but you can read about that in this article: http://www.ibm.com/developerworks/java/library/j-jsf2fu2/index.html and in this Tech Tip Composite UI Components in JSF 2.0. The Catalog application's resources JSF 2.0 standardizes how to define web resources. Resources are any artifacts that a component may need in order to be rendered properly -- images, CSS, or JavaScript files. With JSF 2.0 you put resources in a resources directory or a subdirectory. In your Facelets pages, you can access css files with the , javascript files with the , and images with the JSF tags. The list.xhtml uses the The Catalog application uses a resource bundle to contain the static text and error messages used by the Facelets pages. Putting messages in a resource bundle makes it easier to modify and internationalize your Application text. The messages are in a properties file in a java package directory. Title=Pet Catalog Next=Next Previous=Prev Name=Name The resource bundle is configured in the faces-config.xml File (you don't need any other configuration in the faces-config.xml for JSF 2.0, as explained later you no longer have to configure managed beans and navigation with XML). web.WebMessages msgs The List.xhtml facelets page uses a JSF dataTable component to display a list of catalog items in an html table. The dataTable component is useful when you want to show a set of results in a table. In a JavaServer Faces application, the UIData component (the superclass of dataTable) supports binding to a collection of data objects. It does the work of iterating over each record in the data source. The HTML dataTable renderer displays the data as an HTML table. In the list.xhtml web page the dataTable is defined as shown below: (Note: Red colors are for Java EE tags, annotations code, and Green is for my code or variables) The value attribute of a dataTable tag references the data to be included in the table. The var attribute specifies a name that is used by the components within the dataTable tag as an alias to the data referenced in the value attribute of dataTable. In the dataTable tag from the List.jsp page, the value attribute points to a list of catalog items. The var attribute points to a single item in that list. As the dataTable component iterates through the list, each reference to dataTableItem points to the current item in the list. JSF 2.0 Annotations instead of XML configuration The dataTable's value is bound to the items property of the catalog managed bean. With JSF 2.0 managed beans do not have to be configured in the faces-config.xml file, you annotate the managed beans instead as shown below: @ManagedBean @SessionScoped public class Catalog implements Serializable { By convention, the name of a managed bean is the same as the class name, with the first letter of the class name in lowercase. To specify a managed bean name you can use the name attribute of the ManagedBean annotation, like this: @ManagedBean(name = "Catalog"). This Catalog ManagedBean items property is defined as shown below: private List items = null; public List getItems() { if (items == null) { getPagingInfo(); items = getNextItems(pagingInfo.getBatchSize(), pagingInfo.getFirstItem()); } return items; } The getItems() method returns a List of item objects. The JSF dataTable, supports data binding to a collection of data objects. The dataTable object is modeled as a collection of row objects that can be accessed by a row index. The APIs provide mechanisms to position to a specified row index, and to retrieve an object that represents the data that corresponds to the current row index. The Item properties name, imagethumburl, and priceare displayed with the column component: The column tags represent columns of data in a dataTable component. While the dataTable component is iterating over the rows of data, it processes the UIColumn component associated with each column tag for each row in the table. The dataTable component iterates through the list of items (catalog.items) and displays the item (var="row") attribute value. Each time UIData iterates through the list of items, it renders one cell in each column. The dataTable and column tags use facet to represent parts of the table that are not repeated or updated. These include headers, footers, and captions. Java EE 6: JSF 2.0, EJB 3.1, and Java Persistence API (JPA) 2.0 The Catalog ManagedBean annotates the field private ItemFacade itemFacade; with @EJB , which causes an itemFacade EJB to be injected when the managed bean is instatiated. The Catalog getNextItems method calls the ItemFacade Stateless EJB which uses the Java Persistence API EntityManager Query object to return a list of items. @ManagedBean @SessionScoped public class Catalog implements Serializable { @EJB private ItemFacade itemFacade; public List getNextItems(int maxResults, int firstResult) { return itemFacade.findRange(maxResults, firstResult); } EJB 3.1 No-interface local client View With EJB 3.1, local EJBs do not have to a implement separate interface, that is, all public methods of the bean class are automatically exposed to the caller. Simplified Packaging With Java EE 6, EJBs can be directly packaged in a WAR file just like web components. The ItemFacade EJB uses the Java Persistence API EntityManager Query object to return a list of items. The ItemFacade EJB annotates the field private EntityManager em; with @PersistenceContext , which causes an entity manager to be injected when it is instatiated. @Stateless public class ItemFacade { @PersistenceContext(unitName = "catalogPU") private EntityManager em; public List findRange(int maxResults, int firstResult) { Query q = em.createQuery("select object(o) from Item as o"); q.setMaxResults(maxResults); q.setFirstResult(firstResult); return q.getResultList(); } The Java Persistence Query APIs are used to create and execute queries that can return a list of results. The JPA Query interface provides support for pagination via the setFirstResult() and setMaxResults() methods: q.setMaxResults(int maxResult) sets the maximum number of results to retrieve. q.setFirstResult(int startPosition) sets the position of the first result to retrieve. In the code below, we show the Item entity class which maps to the ITEM table that stores the item instances. This is a typical Java Persistence entity object. There are two requirements for an entity: annotating the class with an @Entity annotation. annotating the primary key identifier with @Id Because the fields name, description.... are basic mappings from the object fields to columns of the same name in the database table, they don't have to be annotated. The O/R relationships with Address and Product are also annotated. For more information on defining JPA entities see Pro EJB 3: Java Persistence API book. @Entity public class Item implements java.io.Serializable { @Id private Integer id; private String name; private String description; private String imageurl; private String imagethumburl; private BigDecimal price; @ManyToOne private Address address; @ManyToOne private Product product; public Item() { } public String getName() { return name; } public void setName(String name) { this.name = name; } ... } The Catalog ManagedBean pages through the list of Items by maintaining the PagingInfo.firstItem and PagingInfo.batchSize attributes and passing these as parameters to the getNextItems(firstItem, batchSize) method. The catalog's scope is defined with the annotation @SessionScoped, a JSF Managedbean with session scope will be stored in the session meaning that the bean's properties will stay alive for the life of the Http Session. A JSF commandButton is used to provide a button to click on to display the next page of items. The commandButton tag is used to submit an action event to the application. This commandButton action attribute references the catalog Managed bean next() method which calculates the next page's first row number and returns a logical outcome String, which causes the list.xhtml page to display the next page's list . The catalog next method is defined as shown below: public String next() { if (firstItem + batchSize < itemCount()) { firstItem += batchSize; } return "list"; } JSF 2.0 Simplified Navigation The JavaServer Faces 2.0 NavigationHandler convention adds .xhtml to the logical outcome of the action method (in this example list) and loads that file, in this case, it loads the list .xhtml page after this method returns. If the action doesn't begin with a forward slash (/), JSF assumes that it's a relative path. You can specify an absolute path by adding the slash like this "/items/list". A JSF commandLink is used to provide a link to click on to display a page with the item details. This commandLink action attribute references The catalog showDetail() method: With JSF 2.0 you can now specify parameters in method expressions. The dataTable row object associated with the selected link is passed as a parameter in the "#{catalog.showDetail(row)}" method expression. The Catalog showDetail() method gets the item data from the input parameter, and returns a string which causes the detail.xhtml page to display the item details : public String showDetail(Item item) { this.item = item; return "detail"; } The JavaServer Faces NavigationHandler adds .xhtml to the logical outcome of the action, detail and loads that file. In this case, the JavaServer Faces implementation loads the detail.xhtml page after this method returns. The detail.xhtml uses the outputText component to display the catalog ManagedBean's item properties: GlassFish v3 is a lightweight server OSGi-based; Embedded API; RESTful admin API; Lightweight and fast startup; iterative development cycle "edit-save-refresh browser": Incremental compile of all JSF 2.0 artifacts when you save. Auto-deploy of all web or Java EE 6 artifacts Session retention: maintain sessions across re-deployments Conclusion This concludes the sample application which demonstrates a pet catalog web application which uses Java EE 6, GlassFish v3 and MySQL. Running the Sample Application Download and install NetBeans IDE 6.8 M1 with GlassFish v3 b57 (Glassfish v3 preview is Java EE 6 Preview) , and MySQL Community Server . Follow these instructions to set up a jdbc-driver for MySQL. (Normally this is already setup with Glassfish, but I got an errror message with Glassfish v3 b57 that it was missing) Download the sample code. Unzip the catalog.zip file which you downloaded, this will create a catalog directory with the project code. Create the Pet Catalog database In order to run the sample code you first have to create the Pet Catalog database and fill in the Item table. Start NetBeans IDE Ensure that GlassFish is registered in the NetBeans IDE, as follows: Click the Services tab in the NetBeans IDE. Expand the Servers node. You should see GlassFish v2 in the list of servers. If not, register GlassFish v2 as follows: Right-click the Servers node and select Add Server. This opens an Add Server Instance wizard. Select GlassFish v2 in the server list of the wizard and click the Next button. Enter the location information for the server and click the Next button. Enter the admin name and password and click the Finish button. Start the MySQL or Java DB database as follows: Click the Services tab in the NetBeans IDE. Expand the databases node. You should see the Java DB database in the list of databases. If you have installed the MySQL server database, you should also see the MySQL database in the list of databases.. Note: Java DB comes bundled with Netbeans, you can download MySQL separately. Right-mouse click on the Java DB or MySQL server database and select Start. If you installed MySQL, set the properties of the MySQL server database as follows: Right-click on the MySQL server database and select Properties. This opens the MySQL Server Properties dialog box, as shown in Figure 8. Figure 8. MySQL Server Basic Properties In the Basic Properties tab, enter the server host name and port number. The IDE specifies localhost as the default server host name and 3306 as the default server port number. Enter the administrator user name, if not displayed, and the administrator password -- the default administrator password is blank. Click the Admin Properties tab. Enter an appropriate path in the Path/URL to admin tool field. You can find the path by browsing to the location of a MySQL Administration application such as the MySQL Admin Tool. Enter an appropriate path in the Path to start command. You can find the path by browsing to the location of the MySQL start command. To find the start command, look for mysqld in the bin folder of the MySQL installation directory. Enter an appropriate path in the Path to stop command field. You can find the path by browsing to the location of the MySQL stop command. This is usually the path to mysqladmin in the bin folder of the MySQL installation directory. If the command is mysqladmin, in the Arguments field, type -u root stop to grant root permissions for stopping the server. The Admin Properties tab should look similar to Figure 9. Figure 9. MySQL Server Administration Properties Click the OK button. Right-click on the MySQL server or Java DB database and select Start. Create the petcatalog database as follows: Right-mouse click on the Java DB or MySQL server database and select Create Database. This will open a create Database window. Enter the database name catalog for Java DB or petcatalog for MySQL. For Java DB enter userid password app app as shown below: Click O.K. to accept the displayed settings. Create the tables in the catalog database as follows: Underneath Databases you should see a database connection for the petcatalog database. For example MySQL: or Java DB: Right-mouse click on the petcatalog connection and select Connect. Right-mouse click on the petcatalog connection and select Execute Command. This will open up a SQL command window. Copy the contents of the catalog.sql file in the catalog directory and paste the contents into the SQL command window, as shown in below: Click the Run SQL icon (Ctrl+Shift+E) above the SQL command window. Note: It is ok to see this: "Error code -1, SQL state 42Y55: 'DROP TABLE' cannot be performed on 'ITEM' because it does not exist. Line 2, column 1" . This just means you are deleting a table that does not exist. If you need to delete and recreate the tables you will not see this message the second time. View the data in the Pet Catalog database Item table as follows: Underneath Databases you should see a database connection for the petcatalog database. For example MySQL: or Java DB: If the database connection is broken like in the following diagram: Right-mouse click on the petcatalog connection and select Connect. as shown below: if prompted for a password, for MySQL leave it blank, for JavaDB enter user app password app. Expand the Tables node below the petcatalog database in the Services window. You should see the item table under the Tables node. You can expand the item table node to see the table columns, indexes, and any foreign keys, as shown in below : Figure 12. An Expanded Table Node You can view the contents of a table or column by right-clicking the table or column and selecting View Data as shown below: Figure 13. Viewing the Contents of a Table Follow these instructions to Create a JDBC Connection pool and JDBC resource. Name the pool mysql_petcatalog_rootPool and the jndi resource jdbc/petcatalog. Note: you do not have to create a JDBC connection pool and resource if you use the Netbeans wizard to generate JPA entities from database tables as described in this article GlassFish and MySQL, Part 2: Building a CRUD Web Application With Data Persistence. Open the catalog/setup/sun-resources.xml file and verify that the property values it specifies match those of the petcatalog database and jdbc resources you created. Edit the property values as necessary. Running the Sample solution: If you want to run the sample solution, you have to create the catalog database tables first as described above. Open the catalog project as follows: In NetBeans IDE, click Open Project in the File menu. This opens the Open Project dialog. Navigate in the Open Project dialog to the catalog directory and click the Open Project button. In response, the IDE opens the catalog project. You can view the logical structure of the project in the Projects window (Ctrl-1). Run the catalog by right-clicking on the catalog project in the Projects window and selecting Run Project. The NetBeans IDE compiles the application, deploys it on Glassfish, and brings up the default page in your browser. (at http://localhost:8080/catalog/). For more information see the following resources: A Sampling of EJB 3.1 Java EE 6 Technologies JSF 2.0 Home page Project Mojarra SDN JavaServer Faces Page JSF 2 fu, Part 1: Streamline Web application development Composite UI Components in JSF 2.0 Creating Your First Java EE 6 Application Roger Kitain's Blog (co-spec lead for JSF 2.0) Ed Burns's Blog (co-spec lead for JSF 2.0) Cay Horstmann's Blog: JSF 2.0 specifying parameters in method expressions JavaServer Faces 2.0 Ref Card Jim Driscoll's Blog Top reasons why GlassFish v3 is a lightweight server Beginning Java™ EE 6 Platform with GlassFish™ 3: From Novice to Professional Book

Finally, some very good news for the Java community. For those who were worried about the future of Java on OSX, don't worry: Apple have just announced that they will be working with Oracle on the OpenJDK project. Apple will contribute most of the key components, tools and technology required for Java SE 7 on Mac OS X. Following the announcement that Apple would not longer be maintaining further JDK updates on Mac OS X beyond the most recent update, this comes as very welcome news to Oracle: “We are excited to welcome Apple as a significant contributor in the growing OpenJDK community,” said Hasan Rizvi, Oracle’s senior vice president of Development. “The availability of Java on Mac OS X plays a key role in the cross-platform promise of the Java platform. The Java developer community can rest assured that the leading edge Java environment will continue to be available on Mac OS X in the future. Combined with last month’s announcement of IBM joining the OpenJDK, the project now has the backing of three of the biggest names in software.” And of course, Apple are happy to keep Java developers happy: “We’re delighted to be working with Oracle to insure that there continues to be a great version of Java on the Mac,” said Bertrand Serlet, Apple’s senior vice president of Software Engineering. “The best way for our users to always have the most up to date and secure version of Java will be to get it directly from Oracle.” Apple also confirmed that Java SE 6 will continue to be available from Apple for Mac OS X Snow Leopard® and the upcoming release of Mac OS X Lion. Java SE 7 and future versions of Java for Mac OS X will be available from Oracle. Henrick has already blogged about this, answering some of questions that are likely to be on developers minds: Q: When will JDK 7 be available for OSX? A: My expectation is that we will release on current supported platforms first, and that OSX support will follow later. The JDK 7 schedule can not easily accomodate large changes like the addition of a new platform. This is great news. Once again we're seeing Oracle listening to community comments, and it's good to see that recent pleas to Apple to contribute their work to the OpenJDK haven't fallen on deaf ears. Kudos to both companies for a continued committment to Java.

Using Java and Marqeta, we’ll build out a fully functioning card payment system your users can use for payments anywhere that a debit or credit card is accepted.

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