Thursday, December 8, 2011
<Insert Picture Here>

Java SE 7: The Platform Evolves
JUG Lausanne, November 30th, 2011
Dalibor Topic
Java F/OSS Ambassad...
The following is intended to outline our general
product direction. It is intended for information
purposes only, and may ...
Audience Survey
• Downloaded JDK 7 GA or 7u1?
• Using it?
• Download a JDK 7 Mac OS X Port - Developer

•
•
•
•
•
•

Previ...
Priorities for the Java Platforms
Grow Developer Base
Grow Adoption
Increase Competitiveness
Adapt to change

Thursday, De...
Java Communities

Thursday, December 8, 2011
How Java Evolves and Adapts

Community Development of
Java Technology
Specifications

Thursday, December 8, 2011
Java Community Process 2.8
• Expert Group transparency
• EG must do all substantive business on a public mailing list
• EG...
Java Community Process 2.8
• Participation
• EG nominations and Spec Lead responses must be public
• EG members are identi...
Evolving the Language
From “Evolving the Java Language” - JavaOne 2005

• Java language principles
–
–
–
–
–
–
–

Reading ...
So you want to change the language?

11
Thursday, December 8, 2011
Java SE 7 Release Contents
• Java Language
•

Project Coin (JSR-334)

• Class Libraries
•
•

NIO2 (JSR-203)
Fork-Join fram...
Small
Language
Changes

<Insert Picture Here>

Section Divider

Project Coin
13
Thursday, December 8, 2011
coin, n. A piece of small change
coin, v. To create new language

14
Thursday, December 8, 2011
Project Coin Constraints
• Small language changes
• Small in specification, implementation, testing
• No new keywords!
• W...
Better Integer Literal
• Binary literals

int mask = 0b101010101010;

• With underscores for clarity

int mask = 0b1010_10...
String Switch Statement
• Today case label includes integer constants and
enum constants
• Strings are constants too (immu...
Discriminating Strings Today
int monthNameToDays(String s, int year) {
if("April".equals(s) || "June".equals(s) ||
"Septem...
Strings in Switch Statements
int monthNameToDays(String s, int year) {
switch(s) {
case "April": case "June":
case "Septem...
Simplifying Generics
• Pre-generics
List strList = new ArrayList();

20
Thursday, December 8, 2011
Simplifying Generics
• Pre-generics
List strList = new ArrayList();
• With Generics
List<String> strList = new ArrayList<S...
Simplifying Generics
• Pre-generics
List strList = new ArrayList();
• With Generics
List<String> strList = new ArrayList<S...
Diamond Operator
• Pre-generics
List strList = new ArrayList();
• With Generics
List<String> strList = new ArrayList<Strin...
Copying a File
InputStream in = new FileInputStream(src);
OutputStream out = new FileOutputStream(dest);
byte[] buf = new ...
Copying a File (Better, but wrong)
InputStream in = new FileInputStream(src);
OutputStream out = new FileOutputStream(dest...
Copying a File (Correct, but complex)
InputStream in = new FileInputStream(src);
try {
OutputStream out = new FileOutputSt...
Copying a File (Correct, but complex)
InputStream in = new FileInputStream(src);
try {
OutputStream out = new FileOutputSt...
Automatic Resource Management
try (InputStream in = new FileInputStream(src),
OutputStream out = new FileOutputStream(dest...
The Details
• Compiler desugars try-with-resources into nested tryfinally blocks with variables to track exception state
•...
More Informative Backtraces
java.io.IOException
at Suppress.write(Suppress.java:19)
at Suppress.main(Suppress.java:8)
Supp...
Varargs Warnings
class Test {
public static void main(String... args) {
List<List<String>> monthsInTwoLanguages =
Arrays.a...
Varargs Warnings Revised
• New mandatory compiler warning at suspect varargs
method declarations
• By applying an annotati...
Exceptions Galore
try {
...
} catch(ClassNotFoundException cnfe) {
doSomethingClever(cnfe);
throw cnfe;
} catch(Instantiat...
Multi-Catch
try {
...
} catch (ClassCastException e) {
doSomethingClever(e);
throw e;
} catch(InstantiationException |
NoS...
35
Thursday, December 8, 2011
New I/O 2 (NIO2) Libraries
JSR 203

• Original Java I/O APIs presented challenges for
developers
•
•
•
•

Not designed to ...
Java NIO2 Features
• Path is a replacement for File
• Biggest impact on developers

• Better directory support
• list() me...
Path Class
• Equivalent of java.io.File in the new API
– Immutable
• Have methods to access and manipulate Path
• Few ways...
File Operation – Copy, Move
• File copy is really easy
– With fine grain control
Path src = Paths.get(“/home/fred/readme.t...
Directories
• DirectoryStream iterate over entries
– Scales to large directories
– Uses less resources
– Smooth out respon...
Concurrency APIs
• JSR166y
• Update to JSR166x which was an update to JSR166

• Adds a lightweight task framework
• Also r...
Fork Join Framework
• Goal is to take advantage of multiple processor
• Designed for task that can be broken down into

sm...
Key Classes
• ForkJoinPool
– Executor service for running ForkJoinTask
• ForkJoinTask
– The base class for forkjoin task
•...
ForkJoin Example – Fibonacci
public class Fibonacci extends RecursiveTask<Integer> {
private final int number;
public Fibo...
ForkJoin Example – Fibonacci
ForkJoinPool pool = new ForkJoinPool();
Fibonacci r = new Fibonacci(10);
pool.submit(r);
whil...
Client Libraries
•
•
•
•

Nimbus Look and Feel
Platform APIs for shaped and translucent windows
JLayer (formerly from Swin...
Nimbus Look and Feel
• Better than Metal for cross platform look-and-feel
• Introduced in Java SE 6u10, now part of Swing
...
JLayer component
Easy enrichment for Swing components

48
Thursday, December 8, 2011
The DaVinci Machine Project (JSR-292)
(A multi-language renaissance for the JVM)

Better

49
Thursday, December 8, 2011
Languages Like Virtual Machines
• Programming languages need runtime support
•
•
•
•
•
•

Memory management / Garbage coll...
JVM Specification

“The Java virtual machine knows
nothing about the Java
programming language, only of a
particular binar...
Languages Running on the JVM
Zigzag

Icon

Rexx

Tcl

CAL

Nice
Simkin

Eiffel

Groovy

Tiger
E

JESS

Modula-2

Correlate...
InvokeDynamic Bytecode
• JVM currently has four ways to invoke method
• Invokevirtual, invokeinterface, invokestatic, invo...
CallSite and MethodHandle
• invokedynamic linked to a CallSite
– CallSite can be linked or unlinked
– CallSite holder of M...
invokedynamic Illustrated
this[method_name](x, y)
invokedynamic
[#bootstrapMethod]
.this_method_name

1. Invoke bootstrap
...
Miscellaneous Things
• Security
• Eliptic curve cryptography
• TLS 1.2

•
•
•
•
•
•

JAXP 1.4.4
JAX-WS 2.2
JAXB 2.2
ClassL...
JDK 7 Platform Support
• Windows x86

• Server 2008, Server 2008 R2, 7 & 8 (when it GAs)
• Windows Vista, XP

• Linux x86
...
JVM Convergence – Forward looking
Project “HotRockit”
JDK 7 GA – 07/11

JDK 7u2

JDK 7uX

JDK 8 GA

• Hotspot 21

• Hotspo...
JDK Roadmap

JDK 7u6
NetBeans 7
• Java SE 7
support
• more

JDK 7u2
JDK 7

• JRE 7 on java.com
• JavaFX 2.0 co-install

20...
JDK 8 - Summer 2013

• Strong feedback from
community – 2 years
needed between JDK
releases
• Release date revised to
summ...
JDK Enhancement Proposal (JEP) Process
• “A process for collecting, reviewing, sorting, and recording the
results of propo...
JEPs as of 11/11/11 (11:11:11)
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•

1
2
101
102
103
104
105
106
107
10...
Conclusions
• Java SE 7
• Incremental changes
• Evolutionary, not revolutionary
• Good solid set of features to make devel...
The preceding is intended to outline our general
product direction. It is intended for information
purposes only, and may ...
65
Thursday, December 8, 2011
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Java 7, or JDK 7 Updates or JDK 8 - Dalibor Topic - December 2011

  1. 1. Thursday, December 8, 2011
  2. 2. <Insert Picture Here> Java SE 7: The Platform Evolves JUG Lausanne, November 30th, 2011 Dalibor Topic Java F/OSS Ambassador Thursday, December 8, 2011
  3. 3. The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle. Thursday, December 8, 2011
  4. 4. Audience Survey • Downloaded JDK 7 GA or 7u1? • Using it? • Download a JDK 7 Mac OS X Port - Developer • • • • • • Preview Release build? • http://jdk7.java.net/macportpreview Subscribed to an OpenJDK mailing list like jdk7u-dev? Contributed to OpenJDK? • http://openjdk.java.net/contribute Following @OpenJDK on Twitter? Following @Java on Twitter? Listening to Java Spotlight podcast? Subscribed to Java Magazine? 4 Thursday, December 8, 2011
  5. 5. Priorities for the Java Platforms Grow Developer Base Grow Adoption Increase Competitiveness Adapt to change Thursday, December 8, 2011
  6. 6. Java Communities Thursday, December 8, 2011
  7. 7. How Java Evolves and Adapts Community Development of Java Technology Specifications Thursday, December 8, 2011
  8. 8. Java Community Process 2.8 • Expert Group transparency • EG must do all substantive business on a public mailing list • EG must track issues in a public issue tracker • EG must respond publicly to all comments • Executive Committee transparency • EC must hold public meetings and teleconferences, and publish minutes • EC must provide a public mailing list for JCP member feedback • TCK and License transparency • TCK licensing must permit public discussion of testing process and results • Spec Lead cannot withdraw a spec/RI/TCK license once offered Thursday, December 8, 2011
  9. 9. Java Community Process 2.8 • Participation • EG nominations and Spec Lead responses must be public • EG members are identified by name and company • Agility • JSRs must reach Early Draft Review within nine months • JSRs must reach Public Review within 12 months after EDR • JSRs must reach Final Release within 12 months after PR • Faster and simpler Maintenance Releases • JCP 2.8 is mandatory for new JSRs, and in-flight JSRs are encouraged to adopt it Thursday, December 8, 2011
  10. 10. Evolving the Language From “Evolving the Java Language” - JavaOne 2005 • Java language principles – – – – – – – Reading is more important than writing Code should be a joy to read The language should not hide what is happening Code should do what it seems to do Simplicity matters Every “good” feature adds more “bad” weight Sometimes it is best to leave things out • One language: with the same meaning everywhere • No dialects • We will evolve the Java language • But cautiously, with a long term view • “first do no harm” also “Growing a Language” - Guy Steele 1999 “The Feel of Java” - James Gosling 1997 10 Thursday, December 8, 2011
  11. 11. So you want to change the language? 11 Thursday, December 8, 2011
  12. 12. Java SE 7 Release Contents • Java Language • Project Coin (JSR-334) • Class Libraries • • NIO2 (JSR-203) Fork-Join framework, ParallelArray (JSR-166y) • Java Virtual Machine • • The DaVinci Machine project (JSR-292) InvokeDynamic bytecode • Miscellaneous things • JSR-336: Java SE 7 Release Contents 12 Thursday, December 8, 2011
  13. 13. Small Language Changes <Insert Picture Here> Section Divider Project Coin 13 Thursday, December 8, 2011
  14. 14. coin, n. A piece of small change coin, v. To create new language 14 Thursday, December 8, 2011
  15. 15. Project Coin Constraints • Small language changes • Small in specification, implementation, testing • No new keywords! • Wary of type system changes • Coordinate with larger language changes – Project Lambda – Modularity • One language, one javac 15 Thursday, December 8, 2011
  16. 16. Better Integer Literal • Binary literals int mask = 0b101010101010; • With underscores for clarity int mask = 0b1010_1010_1010; long big = 9_223_783_036_967_937L; 16 Thursday, December 8, 2011
  17. 17. String Switch Statement • Today case label includes integer constants and enum constants • Strings are constants too (immutable) 17 Thursday, December 8, 2011
  18. 18. Discriminating Strings Today int monthNameToDays(String s, int year) { if("April".equals(s) || "June".equals(s) || "September".equals(s) ||"November".equals(s)) return 30; if("January".equals(s) || "March".equals(s) || "May".equals(s) || "July".equals(s) || "August".equals(s) || "December".equals(s)) return 31; if("February".equals(s)) ... 18 Thursday, December 8, 2011
  19. 19. Strings in Switch Statements int monthNameToDays(String s, int year) { switch(s) { case "April": case "June": case "September": case "November": return 30; case "January": case "March": case "May": case "July": case "August": case "December": return 31; case "February”: ... default: ... 19 Thursday, December 8, 2011
  20. 20. Simplifying Generics • Pre-generics List strList = new ArrayList(); 20 Thursday, December 8, 2011
  21. 21. Simplifying Generics • Pre-generics List strList = new ArrayList(); • With Generics List<String> strList = new ArrayList<String>(); 21 Thursday, December 8, 2011
  22. 22. Simplifying Generics • Pre-generics List strList = new ArrayList(); • With Generics List<String> strList = new ArrayList<String>(); List<Map<String, List<String>> strList = new ArrayList<Map<String, List<String>>(); 22 Thursday, December 8, 2011
  23. 23. Diamond Operator • Pre-generics List strList = new ArrayList(); • With Generics List<String> strList = new ArrayList<String>(); List<Map<String, List<String>> strList = new ArrayList<Map<String, List<String>>(); • With diamond (<>) compiler infers type List<String> strList = new ArrayList<>(); List<Map<String, List<String>> strList = new ArrayList<>(); 23 Thursday, December 8, 2011
  24. 24. Copying a File InputStream in = new FileInputStream(src); OutputStream out = new FileOutputStream(dest); byte[] buf = new byte[8192]; int n; while (n = in.read(buf)) >= 0) out.write(buf, 0, n); 24 Thursday, December 8, 2011
  25. 25. Copying a File (Better, but wrong) InputStream in = new FileInputStream(src); OutputStream out = new FileOutputStream(dest); try { byte[] buf = new byte[8192]; int n; while (n = in.read(buf)) >= 0) out.write(buf, 0, n); } finally { in.close(); out.close(); } 25 Thursday, December 8, 2011
  26. 26. Copying a File (Correct, but complex) InputStream in = new FileInputStream(src); try { OutputStream out = new FileOutputStream(dest); try { byte[] buf = new byte[8192]; int n; while (n = in.read(buf)) >= 0) out.write(buf, 0, n); } finally { out.close(); } } finally { in.close(); } 26 Thursday, December 8, 2011
  27. 27. Copying a File (Correct, but complex) InputStream in = new FileInputStream(src); try { OutputStream out = new FileOutputStream(dest); try { byte[] buf = new byte[8192]; int n; while (n = in.read(buf)) >= 0) out.write(buf, 0, n); } finally { out.close(); } } finally { Exception thrown from in.close(); potentially three places. } Details of first two could be lost 27 Thursday, December 8, 2011
  28. 28. Automatic Resource Management try (InputStream in = new FileInputStream(src), OutputStream out = new FileOutputStream(dest)) { byte[] buf = new byte[8192]; int n; while (n = in.read(buf)) >= 0) out.write(buf, 0, n); } 28 Thursday, December 8, 2011
  29. 29. The Details • Compiler desugars try-with-resources into nested tryfinally blocks with variables to track exception state • Suppressed exceptions are recorded for posterity using a new facillity of Throwable • API support in JDK 7 • New superinterface java.lang.AutoCloseable • All AutoCloseable and by extension java.io.Closeable types useable with try-with-resources • anything with a void close() method is a candidate • JDBC 4.1 retrefitted as AutoCloseable too 29 Thursday, December 8, 2011
  30. 30. More Informative Backtraces java.io.IOException at Suppress.write(Suppress.java:19) at Suppress.main(Suppress.java:8) Suppressed: java.io.IOException at Suppress.close(Suppress.java:24) at Suppress.main(Suppress.java:9) Suppressed: java.io.IOException at Suppress.close(Suppress.java:24) at Suppress.main(Suppress.java:9) 30 Thursday, December 8, 2011
  31. 31. Varargs Warnings class Test { public static void main(String... args) { List<List<String>> monthsInTwoLanguages = Arrays.asList(Arrays.asList("January", "February"), Arrays.asList("Gennaio", "Febbraio" )); } } Test.java:7: warning: [unchecked] unchecked generic array creation for varargs parameter of type List<String>[] Arrays.asList(Arrays.asList("January", ^ 1 warning 31 Thursday, December 8, 2011
  32. 32. Varargs Warnings Revised • New mandatory compiler warning at suspect varargs method declarations • By applying an annotation at the declaration, warnings at the declaration and call sites can be suppressed • @SuppressWarnings(value = “unchecked”) • @SafeVarargs 32 Thursday, December 8, 2011
  33. 33. Exceptions Galore try { ... } catch(ClassNotFoundException cnfe) { doSomethingClever(cnfe); throw cnfe; } catch(InstantiationException ie) { log(ie); throw ie; } catch(NoSuchMethodException nsme) { log(nsme); throw nsme; } catch(InvocationTargetException ite) { log(ite); throw ite; } 33 Thursday, December 8, 2011
  34. 34. Multi-Catch try { ... } catch (ClassCastException e) { doSomethingClever(e); throw e; } catch(InstantiationException | NoSuchMethodException | InvocationTargetException e) { log(e); throw e; } 34 Thursday, December 8, 2011
  35. 35. 35 Thursday, December 8, 2011
  36. 36. New I/O 2 (NIO2) Libraries JSR 203 • Original Java I/O APIs presented challenges for developers • • • • Not designed to be extensible Many methods do not throw exceptions as expected rename() method works inconsistently Developers want greater access to file metadata • Java NIO2 solves these problems 36 Thursday, December 8, 2011
  37. 37. Java NIO2 Features • Path is a replacement for File • Biggest impact on developers • Better directory support • list() method can stream via iterator • Entries can be filtered using regular expressions in API • Symbolic link support • java.nio.file.Filesystem • interface to a filesystem (FAT, ZFS, Zip archive, network, etc) • java.nio.file.attribute package • Access to file metadata 37 Thursday, December 8, 2011
  38. 38. Path Class • Equivalent of java.io.File in the new API – Immutable • Have methods to access and manipulate Path • Few ways to create a Path – From Paths and FileSystem //Make a reference to the path Path home = Paths.get(“/home/fred”); //Resolve tmp from /home/fred -> /home/fred/tmp Path tmpPath = home.resolve(“tmp”); //Create a relative path from tmp -> .. Path relativePath = tmpPath.relativize(home) File file = relativePath.toFile(); 38 Thursday, December 8, 2011
  39. 39. File Operation – Copy, Move • File copy is really easy – With fine grain control Path src = Paths.get(“/home/fred/readme.txt”); Path dst = Paths.get(“/home/fred/copy_readme.txt”); Files.copy(src, dst, StandardCopyOption.COPY_ATTRIBUTES, StandardCopyOption.REPLACE_EXISTING); • File move is supported – Optional atomic move supported Path src = Paths.get(“/home/fred/readme.txt”); Path dst = Paths.get(“/home/fred/readme.1st”); Files.move(src, dst, StandardCopyOption.ATOMIC_MOVE); 39 Thursday, December 8, 2011
  40. 40. Directories • DirectoryStream iterate over entries – Scales to large directories – Uses less resources – Smooth out response time for remote file systems – Implements Iterable and Closeable for productivity • Filtering support – Build-in support for glob, regex and custom filters Path srcPath = Paths.get(“/home/fred/src”); try (DirectoryStream<Path> dir = srcPath.newDirectoryStream(“*.java”)) { for (Path file: dir) System.out.println(file.getName()); } 40 Thursday, December 8, 2011
  41. 41. Concurrency APIs • JSR166y • Update to JSR166x which was an update to JSR166 • Adds a lightweight task framework • Also referred to as Fork/Join • Phaser • Barrier similar to CyclicBarrier and CountDownLatch • TransferQueue interface • Extension to BlockingQueue • Implemented by LinkedTransferQueue 41 Thursday, December 8, 2011
  42. 42. Fork Join Framework • Goal is to take advantage of multiple processor • Designed for task that can be broken down into smaller pieces – Eg. Fibonacci number fib(10) = fib(9) + fib(8) • Typical algorithm that uses fork join if I can manage the task perform the task else fork task into x number of smaller/similar task join the results 42 Thursday, December 8, 2011
  43. 43. Key Classes • ForkJoinPool – Executor service for running ForkJoinTask • ForkJoinTask – The base class for forkjoin task • RecursiveAction – A subclass of ForkJoinTask – A recursive resultless task – Implements compute() abstract method to perform calculation • RecursiveTask – Similar to RecursiveAction but returns a result 43 Thursday, December 8, 2011
  44. 44. ForkJoin Example – Fibonacci public class Fibonacci extends RecursiveTask<Integer> { private final int number; public Fibonacci(int n) { number = n; } } @Override protected Integer compute() { switch (number) { case 0: return (0); case 1: return (1); default: Fibonacci f1 = new Fibonacci(number – 1); Fibonacci f2 = new Fibonacci(number – 2); f1.fork(); f2.fork(); return (f1.join() + f2.join()); } } 44 Thursday, December 8, 2011
  45. 45. ForkJoin Example – Fibonacci ForkJoinPool pool = new ForkJoinPool(); Fibonacci r = new Fibonacci(10); pool.submit(r); while (!r.isDone()) { //Do some work ... } System.out.println("Result of fib(10) = " + r.get()); 45 Thursday, December 8, 2011
  46. 46. Client Libraries • • • • Nimbus Look and Feel Platform APIs for shaped and translucent windows JLayer (formerly from Swing labs) Optimised 2D rendering 46 Thursday, December 8, 2011
  47. 47. Nimbus Look and Feel • Better than Metal for cross platform look-and-feel • Introduced in Java SE 6u10, now part of Swing • Not the default L&F 47 Thursday, December 8, 2011
  48. 48. JLayer component Easy enrichment for Swing components 48 Thursday, December 8, 2011
  49. 49. The DaVinci Machine Project (JSR-292) (A multi-language renaissance for the JVM) Better 49 Thursday, December 8, 2011
  50. 50. Languages Like Virtual Machines • Programming languages need runtime support • • • • • • Memory management / Garbage collection Concurrency control Security Reflection Debugging integration Standard libraries • Compiler writers have to build these from scratch • Targeting a VM allows reuse of infrastructure 50 Thursday, December 8, 2011
  51. 51. JVM Specification “The Java virtual machine knows nothing about the Java programming language, only of a particular binary format, the class file format.” 1.2 The Java Virtual Machine Spec. 51 Thursday, December 8, 2011
  52. 52. Languages Running on the JVM Zigzag Icon Rexx Tcl CAL Nice Simkin Eiffel Groovy Tiger E JESS Modula-2 Correlate Tea Jickle Prolog Mini Drools v-language Anvil Smalltalk Tiger Ada G Clojure Dawn Processing WebL LLP BeanShell Forth Jython Yoix Pascal Luck PLAN Yassl C# JavaScript Basic JudoScript JavaFX Script Logo Lisp iScript Hojo Funnel Oberon FScript JHCR Scheme JRuby Phobos TermWare PHP Scala Pnuts Sather Sleep Bex Script SALSA ObjectScript Piccola 51 52 Thursday, December 8, 2011
  53. 53. InvokeDynamic Bytecode • JVM currently has four ways to invoke method • Invokevirtual, invokeinterface, invokestatic, invokespecial • All require full method signature data • InvokeDynamic will use method handle • Effectively an indirect pointer to the method • When dynamic method is first called bootstrap code determines method and creates handle • Subsequent calls simply reference defined handle • Type changes force a re-compute of the method location and an update to the handle • Method call changes are invisible to calling code 53 Thursday, December 8, 2011
  54. 54. CallSite and MethodHandle • invokedynamic linked to a CallSite – CallSite can be linked or unlinked – CallSite holder of MethodHandle • MethodHandle is a directly executable reference to an underlying method, constructor, field – Can transform arguments and return type – Transformation – conversion, insertion, deletion, substitution 54 Thursday, December 8, 2011
  55. 55. invokedynamic Illustrated this[method_name](x, y) invokedynamic [#bootstrapMethod] .this_method_name 1. Invoke bootstrap 2. Produces CallSite 3.Complete linkage CallSite 4. Invokes method implementation class LangaugeRuntime { bootstrapMethod(info) { ... return new CallSite(); } class AClass { aMethod(x, y) { Method ... Handle } 55 Thursday, December 8, 2011
  56. 56. Miscellaneous Things • Security • Eliptic curve cryptography • TLS 1.2 • • • • • • JAXP 1.4.4 JAX-WS 2.2 JAXB 2.2 ClassLoader architecture changes close() for URLClassLoader Javadoc support for CSS 56 Thursday, December 8, 2011
  57. 57. JDK 7 Platform Support • Windows x86 • Server 2008, Server 2008 R2, 7 & 8 (when it GAs) • Windows Vista, XP • Linux x86 • • • • Oracle Linux 5.5+, 6.x Red Hat Enterprise Linux 5.5+, 6.x SuSE Linux Enterprise Server 10.x, 11.x Ubuntu Linux 10.04 LTS, 11.04 • Solaris x86/SPARC • Solaris 10.9+, 11.x • Apple OSX x86 • will be supported post-GA, detailed plan TBD Note: JDK 7 should run on pretty much any Windows/Linux/Solaris. These configurations are the ones primarily tested by Oracle, and for which we provide commercial support. 57 Thursday, December 8, 2011
  58. 58. JVM Convergence – Forward looking Project “HotRockit” JDK 7 GA – 07/11 JDK 7u2 JDK 7uX JDK 8 GA • Hotspot 21 • Hotspot 22 • Hotspot 23 • Hotspot24 • Java SE 7 Support • Performance • More performance • Java SE 8 Support • Rebranding • Enable large heaps • Improved command • All performance • Improved JMX Agent • Command line servicability tool (jrcmd) --- Premium --• Improved JRockit Mission Control Console support Thursday, December 8, 2011 with reasonable latencies line servicability (jcmd) • Enable large heaps with consistent reasonable latencies • No PermGen --- Premium --• Complete JRockit Flight Recorder Support features from JRockit ported • All servicability features from JRockit ported • Compiler controls • Verbose logging --- Premium --• JRockit Mission Control Memleak Tool Support • Soft Real Time GC
  59. 59. JDK Roadmap JDK 7u6 NetBeans 7 • Java SE 7 support • more JDK 7u2 JDK 7 • JRE 7 on java.com • JavaFX 2.0 co-install 2011 Last public JDK 6 update • OS X JRE port (for end-users) • Improved OS integration, autoupdate NetBeans.next • Java SE 8 support • JavaFX 3.0 support • more 2013 2012 2014 Mac OS X JDK 7u4 JDK 8 • JDK 7 Dev Preview • JavaFX 2.0 Dev Preview • OS X JDK Port (for developers) • Windows, Linux, Solaris, OS X • Jigsaw • Lambda • JavaFX 3.0 • Complete Oracle JVM convergence • JavaScript interop • more NetBeans 7.1 • JavaFX 2.0 support Thursday, December 8, 2011
  60. 60. JDK 8 - Summer 2013 • Strong feedback from community – 2 years needed between JDK releases • Release date revised to summer 2013 (from late 2012) • Enables larger scope, such as: – Jigsaw – complete platform modularization, container support – Lambda – Bulk operations – JavaScript Interop – Device Support Thursday, December 8, 2011 Theme Description/Content Project Jigsaw EXPANDED • Module system for Java applications and the Java platform Project Lambda EXPANDED • Closures and related features in the Java language (JSR 335) • Bulk parallel operations in Java collections APIs (filter/map/reduce) Oracle JVM Convergence • Complete migration of performance and serviceability features from JRockit, including Mission Control and the Flight Recorder JavaFX 3.0 • Next generation Java client JavaScript NEW Device Support NEW • Next-gen JavaScript-on-JVM engine (Project Nashorn) • JavaScript/Java interoperability on JVM • Multi-Touch (JavaFX), Camera, Location, Compass and Accelerometer Developer Productivity • Annotations on types (JSR 308), Minor language enhancements API and Other Updates • Enhancements to Security, Date/Time, (JSR 310) Networking, Internationalization, Accessibility, Packaging/Installation Open Source • Open development in OpenJDK, open source additional closed components
  61. 61. JDK Enhancement Proposal (JEP) Process • “A process for collecting, reviewing, sorting, and recording the results of proposals for enhancements to the JDK” • Goal: Produce a regularly-updated list of proposals to serve as the long-term Roadmap for JDK Release Projects • Looks at least three years into the future to allow time for the most complex proposals to be defined and implemented • Open to every OpenJDK Committer • Does not in any way supplant the Java Community Process Thursday, December 8, 2011
  62. 62. JEPs as of 11/11/11 (11:11:11) • • • • • • • • • • • • • • • • • • • • • • • • • • • • 1 2 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 Thursday, December 8, 2011 JDK Enhancement-Proposal & Roadmap Process JEP Template Generalized Target-Type Inference Process API Updates Parallel Array Sorting Annotations on Java Types DocTree API Add Javadoc to javax.tools Bulk Data Operations for Collections Collections Enhancements from Third-Party Libraries Enhance Core Libraries with Lambda New HTTP Client Additional Unicode Constructs for Regular Expressions Charset Implementation Improvements MS-SFU Kerberos 5 Extensions TLS Server Name Indication (SNI) Extension AEAD CipherSuites Extended Validation Certificates Remove the Annotation-Processing Tool (apt) Access to Parameter Names at Runtime javax.lang.model Implementation Backed by Core Reflection Repeating Annotations Stronger Algorithms for Password-Based Encryption Remove the Permanent Generation Configurable Secure Random-Number Generation Enhance the Certificate Revocation-Checking API Network Interface Aliases, Events, and Defaults Lambda Expressions and Virtual Extension Methods
  63. 63. Conclusions • Java SE 7 • Incremental changes • Evolutionary, not revolutionary • Good solid set of features to make developers life easier • Java SE 8 • Major new features: Modularisation and Closures • More smaller features to be defined • Java continues to grow and adapt to the changing world of IT 63 Thursday, December 8, 2011
  64. 64. The preceding is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle. 64 Thursday, December 8, 2011
  65. 65. 65 Thursday, December 8, 2011

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