Java 6 [Mustang] - Features and Enchantments

Visit me @ www.Pavel-Kaminsky.com Java 6 : Mustang Unleashed!

Visit me @ www.Pavel-Kaminsky.com Source Code SVN All Sources can be checked out (SVN) from here: http://code.google.com/p/java6-features/

What’s New? Web Services Scripting Database More Desktop APIs Monitoring and Management Compiler Access Pluggable Annotations Desktop Deployment Security Performance and Quality Visit me @ www.Pavel-Kaminsky.com

Language Enhancements in Java SE 6 No language changes were introduced in Java SE 6 !!!!!!!!! where is my “syntactic sugar”?! Visit me @ www.Pavel-Kaminsky.com

Visit me @ www.Pavel-Kaminsky.com JAX-WS 2.0 (JSR 224) includes “ Java Architecture for XML Binding” (JAXB) 2.0. “ SOAP with Attachments API for Java” (SAAJ) 1.3.

Visit me @ www.Pavel-Kaminsky.com @WebService package webServices; import javax.jws.WebService; import javax.xml.ws.Endpoint; /** * @Author: webmaster@pavel-kaminsky.com * @Date: 11/09/11 */ @WebService public class CalculatorWS { public int add(int a , int b) { return a+b; } public static void main(String[] args) { Endpoint.publish("http://localhost:8080/calculator",new CalculatorWS()); } }

Scripting (JSR 223) Scripting language independent framework for using script engines from Java code Write customizable/extendable applications in the Java language and leave the customization scripting language choice to the end user The Java application developer need not choose the extension language during development Sun's implementation of JDK 6 is co-bundled with the Mozilla Rhino based JavaScript script engine. Visit me @ www.Pavel-Kaminsky.com

Scripting – example package scripting.example2; /** * @Author: pavel.kaminsky@hp.com * @Date: 31/08/11 */ import javax.script.*; import java.io.File; public class InvokeScriptMethod { public static void main(String[] args) throws Exception { ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getEngineByName("JavaScript"); engine.eval(new java.io.FileReader(new File("src/scripting/example2/script.js").getAbsoluteFile())); Invocable inv = (Invocable) engine; // get script object on which we want to call the method Object obj = engine.get("obj"); // invoke the method named "hello" on the script object "obj" inv.invokeMethod(obj, "rock", "Pavel-Kaminsky.com" ); } } Visit me @ www.Pavel-Kaminsky.com

Scripting – example Scripts.js var obj = new Object(); obj.rock = function(name) { result = name + ',Are you ready to rock?!!'; print(result); return result; } Output : Pavel Kaminsky , Are you ready to rock?!! Answer: HAIL YEAH!!! Visit me @ www.Pavel-Kaminsky.com

Importing Java Packages package scripting.example3; /** * @Author: pavel.kaminsky@hp.com * @Date: 31/08/11 */ import javax.script.Invocable; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; import java.io.File; import java.util.ArrayList; public class ScriptMethodImportPackages { public static void main(String[] args) throws Exception { ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getEngineByName("JavaScript"); engine.eval(new java.io.FileReader(new File("src/scripting/example3/script.js").getAbsoluteFile())); Invocable inv = (Invocable) engine; String myArray[] = (String[]) engine.get("myArray"); ArrayList yourArray = (ArrayList)engine.get("yourArray"); System.out.println(myArray[myArray.length-1]); System.out.println(yourArray.get(yourArray.size()-1)); } } Visit me @ www.Pavel-Kaminsky.com

Scripting – example 1 Scripts.js var myArray = java.lang.reflect.Array.newInstance(java.lang.String, 1); var yourArray = new java.util.ArrayList(); myArray[0] = "this is MY Array!"; yourArray.add("this is YOUR Array!"); Output : this is MY Array! this is YOUR Array! Visit me @ www.Pavel-Kaminsky.com

Database Shipped with a Java DB ( = DB Apache Derby) A transactional, relational database. storage of a database archived in a JAR file, which allows you to simply distribute the JAR file. Start/Stop locally : java �jar derbyrun.jar server start 192.168.0.1 1555 Accessed via JDBC The $ JAVA_HOME/db subdirectory contains class libraries for Java DB, Sun Microsystems's distribution of the Apache Derby database technology. Visit me @ www.Pavel-Kaminsky.com

Database Example package database; /** * @Author: pavel.kaminsky@hp.com * @Date: 31/08/11 */ import java.sql.*; public class JavaDBExample { static Connection conn; public static void main(String[] args) throws Exception { if (args.length != 2) { System.out.println("Usage: <Name> <Address>"); System.exit(1); } String dbName = "UsersDB"; String connectionURL = "jdbc:derby:" + dbName + ";create=true"; Class.forName("org.apache.derby.jdbc.EmbeddedDriver"); conn = DriverManager.getConnection(connectionURL); // create table Statement stmt = conn.createStatement(); stmt.executeUpdate("CREATE TABLE USERS (ID NUMBER NOT NULL, UserName VARCHAR(250) NOT NULL)"); Visit me @ www.Pavel-Kaminsky.com

// insert user PreparedStatement psInsert = conn.prepareStatement("insert into USERS values (?,?)"); psInsert.setInt(1, 1); psInsert.setString(2, "Lenny Kravitz"); psInsert.executeUpdate(); // load user Statement usetStmt = conn.createStatement(); ResultSet rs = usetStmt.executeQuery("select * from USERS"); while (rs.next()) { System.out.println("Id: " + rs.getInt(1) + " Name" + rs.getString(2)); } rs.close(); } } Output : Id:1 Name:Lenny Kravitz Visit me @ www.Pavel-Kaminsky.com

java.awt.Desktop class Minimize the difference between the performance and integration of native applications and Java applications. Adopted JDesktop Integration Components (JDIC) API (http://jdic.dev.java.net/) Visit me @ www.Pavel-Kaminsky.com

Java.awt.Desktop public static enum Action { /** * Represents an "open" action. * @see Desktop#open(java.io.File) */ OPEN , /** * Represents an "edit" action. * @see Desktop#edit(java.io.File) */ EDIT , /** * Represents a "print" action. * @see Desktop#print(java.io.File) */ PRINT , /** * Represents a "mail" action. * @see Desktop#mail() * @see Desktop#mail(java.net.URI) */ MAIL , /** * Represents a "browse" action. * @see Desktop#browse(java.net.URI) */ BROWSE }; Visit me @ www.Pavel-Kaminsky.com

Desktop.isDesktopSupported() – checks whether Desktop functionality is available. Desktop desktop = Desktop.getDesktop(); desktop.isSupported(Desktop.Action) – check whether the functionality is available. 5 New functionalities : public void mail() throws IOException public void open(File file) throws IOException public void edit(File file) throws IOException public void print(File file) throws IOException public void browse(URI uri) throws IOException Let’s See a DEMO! Visit me @ www.Pavel-Kaminsky.com

System Tray Functionality Now it’s possible to hook the “System Tray” SystemTray tray = SystemTray.getSystemTray(); public TrayIcon(Image image, String tooltip, PopupMenu popup) public static boolean isSupported() public void add(TrayIcon trayIcon) throws AWTException public void remove(TrayIcon trayIcon) Let’s See a DEMO! Question : why there is no AWTException thrown on “remove” method? Visit me @ www.Pavel-Kaminsky.com

Monitoring and Management Improvements in jconsle “ jps ” tool - Roll call of all the names and numbers of all the Java processes on your machine. Good for other command lines as they required id’s. >C:\Users\kaminskp>jps.exe >5484 >5324 >7816 Jps “ jhat ” - Java Heap Analysis Tool Visit me @ www.Pavel-Kaminsky.com

Usage Find java application id with jps. Create a dump with jmap into a file. C:\Users\kaminskp>jmap -dump:file=output.txt <id> Jhat the dump file. C:\Users\kaminskp>jhat output.txt Reading from output.txt ... Dump file created Thu Sep 01 13:18:09 IDT 2011 Snapshot read, resolving... Resolving 45981 objects... Chasing references, expect 9 dots......... Eliminating duplicate references......... Snapshot resolved. Started HTTP server on port 7000 Server is ready. Browse to http://localhost:7000 Visit me @ www.Pavel-Kaminsky.com Let’s see an Example!

Personal Recommendation Don’t use JHat. Use IBM’s MAT (Memory Analyzing Tool) instead , download here . Visit me @ www.Pavel-Kaminsky.com

Compiler Access ( JSR 199) Compile java source files from within java files No need to fork into new javac.exe process JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); int run(InputStream in, OutputStream out, OutputStream err, String... arguments); Good for IDE’s (compiling on the fly) Visit me @ www.Pavel-Kaminsky.com compiler.run(null, null, null, “One.java”, “Two.java”); Let’s see an Example!

Pluggable Annotations (JSR 269) @Annotation – remember that ?!? Common annotations : @SuppressWarnings @Override @Deprecated Integrate custom annotation with compiler! Visit me @ www.Pavel-Kaminsky.com

Example (included in the example’s code) Let’s create a new annotation package pluggableAnnotations; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; @Retention( RetentionPolicy.SOURCE ) @Target( ElementType.METHOD ) public @interface Borat { } Visit me @ www.Pavel-Kaminsky.com

BoratBuilderProcessor package pluggableAnnotations; import javax.annotation.processing.AbstractProcessor; import javax.annotation.processing.RoundEnvironment; import javax.annotation.processing.SupportedAnnotationTypes; import javax.annotation.processing.SupportedSourceVersion; import javax.lang.model.SourceVersion; import javax.lang.model.element.Element; import javax.lang.model.element.TypeElement; import javax.tools.Diagnostic; import java.util.Set; @SupportedAnnotationTypes("pluggableAnnotations.Borat") @SupportedSourceVersion(SourceVersion.RELEASE_6) public class BoratBuilderProcessor extends AbstractProcessor { @Override public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) { for (TypeElement typeElement : annotations) { for (Element element : roundEnv.getElementsAnnotatedWith(typeElement)) { this.processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "I Like! but we don't use this method in Kazakhstan", element); } } return true; } } Visit me @ www.Pavel-Kaminsky.com

Packaging Create an “META-INF/Services” Folder Add a text file named javax.annotation.processing.Processor Insert the path to BoratBuilderProcessor into the file Package into Jar! Visit me @ www.Pavel-Kaminsky.com

Visual .. Visit me @ www.Pavel-Kaminsky.com

Create a TestApp Link the jar into your project (I use IntelliJ) Visit me @ www.Pavel-Kaminsky.com

Tester.java import pluggableAnnotations.Borat; import javax.annotation.processing.Processor; import java.util.ServiceLoader; public class Tester { @Borat public static String annotateMe() { return "Welcome to America"; } public static void main(String[] args) { ServiceLoader<Processor> processors = ServiceLoader.load(Processor.class); for (Processor processor : processors) { System.out.println(processor.getClass().getSimpleName() + " : " + processor.getClass().getCanonicalName()); } System.out.println(Tester.annotateMe()); } } Visit me @ www.Pavel-Kaminsky.com

javac What do you think would happen? Visit me @ www.Pavel-Kaminsky.com

Visit me @ www.Pavel-Kaminsky.com Desktop Deployment Swing Improvements for Windows and GTK look and Feel Can you tell the difference?! 29

Visit me @ www.Pavel-Kaminsky.com More “Perks” JTable Sorting and Filtering no more customs implemantations. JTable table = new JTable(model); final TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(model); table.setRowSorter(sorter); sorter.setRowFilter(RowFilter.regexFilter(text )); New Modality Modeless – no modality Document-modal - blocks all windows from the same document , except those from its child hierarchy Application-modal - blocks all windows from the same application , except those from its child hierarchy Toolkit-modal - blocks all windows that run in the same toolkit , except those from its child hierarchy

Visit me @ www.Pavel-Kaminsky.com More “Perks” Splash Screen – revamped Security Dialogs

Security Kerberos Integration Support for Smart Card I/O API JAAS-based authentication using LDAP Visit me @ www.Pavel-Kaminsky.com

Performance Visit me @ www.Pavel-Kaminsky.com

Visit me @ www.Pavel-Kaminsky.com SPECjbb2005 Test SPECjbb2005 is an industry-standard benchmark designed to measure the server-side performance of Java runtime environments SPECjbb2005 bops (business operations per second), obtained by averaging the total transaction rate in a SPECjbb2005 run from the expected peak number of warehouses, to twice the peak number of warehouses Bops metric measures the overall throughput achieved by all the JVMs in a benchmark run. SPECjbb2005 bops/JVM reflects the contribution of a single JVM to the overall metric , and is thus a measure of the performance and scaling of a single JVM http://www.spec.org/jbb2005/results/

Visit me @ www.Pavel-Kaminsky.com Server Side Performance

Visit me @ www.Pavel-Kaminsky.com Thank You! Visit and Subscribe

Java 6 [Mustang] - Features and Enchantments

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