Philly Java Users Group Whats new in Whats new in Java 2 Standard - - PowerPoint PPT Presentation

Philly Java Users Group

Kirk k B. Spadt padt

What’s new in What’s new in Java 2 Standard Edition 1.4 Java 2 Standard Edition 1.4

ki kirk@ k@spadt spadt.com com

Java 2 Standard Edition 1.4 Java 2 Standard Edition 1.4

• Availability: F

Availability: February 13, 2002 ebruary 13, 2002

• Size: Over 11,000 classes (API’s + impl)

Size: Over 11,000 classes (API’s + impl)

• Changes: 33%

Changes: 33% new or changed methods new or changed methods

• Performance: Major enhancements

Performance: Major enhancements

• Functionality: Enterprise connectivity

unctionality: Enterprise connectivity

• Scalability: 64-bit core support

Scalability: 64-bit core support

• Ease of programming: More API’s

Ease of programming: More API’s

• Ease of use: Drag/drop, wheel, install

Ease of use: Drag/drop, wheel, install

• Compatibility with earlier releases

Compatibility with earlier releases

Perform Performance Enhancem ance Enhancements ents

• 50-100%

50-100% I/O improvement I/O improvement

• 10x Reflection performance increase

10x Reflection performance increase

• Garbage collection - concurrent (MP)

Garbage collection - concurrent (MP)

• 30%

30% Swing improvement (pipeline) Swing improvement (pipeline)

• Hardware acceleration (DirectDraw)

Hardware acceleration (DirectDraw)

• 20%

20% reduction in RAM footprint reduction in RAM footprint

• 20%

20% reduction in startup time reduction in startup time

API’s M API’s Moved into J2SE v1.4

• ved into J2SE v1.4
• JAXP: Java API for XML Processing

JAXP: Java API for XML Processing

• JDBC-2, 2.1 and JDBC 3.0

JDBC-2, 2.1 and JDBC 3.0

• CORBA enhancements

CORBA enhancements

• DNS Service Provider for JNDI

DNS Service Provider for JNDI

• JCE: Java Cryptography Extensions

JCE: Java Cryptography Extensions

• JSSE: Java Secure Socket Extension

JSSE: Java Secure Socket Extension

• JAAS: Java Authentication/Authorization

JAAS: Java Authentication/Authorization

• GSS-API: Kerberos Single sign-on

GSS-API: Kerberos Single sign-on

New Functions New Functions

• Assertions

Assertions

• Regular expressions

Regular expressions

• New I/O API

New I/O API

• Printing API

Printing API

• Logging API

Logging API

• Preferences API

Preferences API

• XML Persistence

XML Persistence

• Fast 2D Graphics

ast 2D Graphics

• Redesigned focus

Redesigned focus

• Swing drag-n-drop

Swing drag-n-drop

• Java Web Start

Java Web Start

Code Disclaim Code Disclaimer er

• Subsequent sections include a

Subsequent sections include a sample sample pro program gram to illustrate use to illustrate use of the new

• f the new

classes. classes.

• Written to be BRIEF

Written to be BRIEF (single slide) (single slide)  The code works…, but… he code works…, but…  Ignores exceptions Ignores exceptions  Breaks MVC & some accepted practices Breaks MVC & some accepted practices

• Code is AS

Code is AS-IS IS, and , and use in nuclear facilities use in nuclear facilities

• r life-support applications is prohibited.
• r life-support applications is prohibited.

Assertions Assertions

• Tests a condition you “know” is true

ests a condition you “know” is true  Confirms programmer assumptions Confirms programmer assumptions  Improves program reliability Improves program reliability

• assert: New Java language keyword

: New Java language keyword

 javac –source 1.4 Foo.java

to compile to compile

 java –ea Foo to run

to run

• throws an AssertionError

throws an AssertionError  java.lang.Error subclass (unchecked) java.lang.Error subclass (unchecked)

package com.spadt.jdk14; /** * Demonstrates the use of the assert keyword. */ public class Assert { public static void countChars(String s) { assert s != null : "string cannot be null"; System.out.println("String [" + s + "] has " + s.length() + " chars."); } public static void main(String[] args) { countChars("valid string"); countChars(null); } }

Compiling: Assertions disabled >javac com\spadt\jdk14\Assert.java com\spadt\jdk14\Assert.java:7: warning: as of release 1.4, assert is a keyword, and may not be used as an identifier assert s != null : "string cannot be null"; ^ com\spadt\jdk14\Assert.java:7: ';' expected assert s != null : "string cannot be null"; ^ com\spadt\jdk14\Assert.java:7: cannot resolve symbol symbol : class assert location: class com.spadt.jdk14.Assert assert s != null : "string cannot be null"; ^ com\spadt\jdk14\Assert.java:7: s is already defined in countChars(java.lang.String) assert s != null : "string cannot be null"; ^ Compiling: Assertions enabled

Running: Assertions disabled >java com.spadt.jdk14.Assert String [valid string] has 12 chars. Exception in thread "main" java.lang.NullPointerException at com.spadt.jdk14.Assert.countChars(Assert.java:8) at com.spadt.jdk14.Assert.main(Assert.java:13) Running: Assertions enabled >java -ea com.spadt.jdk14.Assert String [valid string] has 12 chars. Exception in thread "main" java.lang.AssertionError: string is null at com.spadt.jdk14.Assert.countChars(Assert.java:7) at com.spadt.jdk14.Assert.main(Assert.java:13)

Assertions Strategy Assertions Strategy

• YES: Programmer errors or omissions

YES: Programmer errors or omissions  if() … else if() … else assert if() … else if() … else assert  switch(x) … case 1: … default: assert switch(x) … case 1: … default: assert  verifying ownership of object locks verifying ownership of object locks  how could I ever get here? how could I ever get here?

• NO: User, system, or configuration errors

NO: User, system, or configuration errors  User entry errors – detailed message User entry errors – detailed message  SQL, Remote, etc errors – log them SQL, Remote, etc errors – log them  Config errors – log for deployers Config errors – log for deployers

Regular Expressions Regular Expressions

• Powerful tools to match and process text.

Powerful tools to match and process text.

• Familiar to unix shell and perl programmers

amiliar to unix shell and perl programmers

• Matching, extraction, and substitution

Matching, extraction, and substitution

• Examples for matches:

Examples for matches:  “[0-9]+” – matches one or more digits [0-9]+” – matches one or more digits  “dog|cat” – matches either “dog” or “cat” dog|cat” – matches either “dog” or “cat”  (.* (.*)\r?\n” – the (.* )\r?\n” – the (.*) matches a text line ) matches a text line  “[a-zA-Z [a-zA-Z][a-zA-Z ][a-zA-Z_0-9]* _0-9]*” – a java name ” – a java name

Regular Expression Classes Regular Expression Classes

• java.util.regex: New

ew package package

• Pat

atter ern n cl class: ass: speci specify y a a regul egular ar expr expressi ession

• n

 mat atches( ches(): an an easy easy test est for

• r a

a mat atch ch  spl split(): br breaks eaks a a st string ng usi using ng del delimiter ers  Com

• mpi

pile( e(): Par arse se expr expr ahead ahead - per perfor

• rmance

ance

• Mat

atche cher class: s: mat atch ch and nd par arse se text ext usi using ng the he regul egular ar expr expressi ession

• n

 mat atches( ches(): a a fast ast test est for

• r a

a mat atch ch  find( nd(): test ests s if text ext cont contai ains ns pat patter ern  st star art(), end( end() – – indexes ndexes of

• f mat

atch ch  gr group(

• up() –

– a a st string ng or

• r subst

substring ng that hat mat atched ched

package com.spadt.jdk14; import java.io.*; import java.util.regex.*; /** Cool stuff to do with java.util.Regex */ public class RegexTricks { public static void main(String[] args) throws IOException { String info = null; BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); Pattern emailPattern = Pattern.compile("(.+)@(.+\\.(com|net|org))"); Matcher em = emailPattern.matcher(""); while((info = in.readLine()).length() > 0) { if(Pattern.matches("[0-9]*", info)) { System.out.println("Number=" + info); } else if(em.reset(info).matches()) { System.out.println("User=" + em.group(1) + ", host=" + em.group(2) + ", a dot-" + em.group(3)); } else { String[] parts = Pattern.compile("[.,]").split(info); for(int i = 0; i < parts.length; i++) System.out.println("Part " + i + "=" + parts[i]); } } }

from public class RegexTricks Pattern emailPattern = Pattern.compile("(.+)@(.+\\.(com|net|org))"); Matcher em = emailPattern.matcher(""); while((info = in.readLine()).length() > 0) { if(Pattern.matches("[0-9]*", info)) { System.out.println("Number=" + info); } else if(em.reset(info).matches()) { System.out.println("User=" + em.group(1) + ", host=" + em.group(2) + ", a dot-" + em.group(3)); } else { String[] parts = Pattern.compile("[.,]").split(info); for(int i = 0; i < parts.length; i++)

New I/O (NIO) API New I/O (NIO) API

• Ultra-scalable high-performance server apps

Ultra-scalable high-performance server apps

• Access to large quantities of data

Access to large quantities of data

• New F

New File I/O ile I/O  Read/write/transfer twice as fast Read/write/transfer twice as fast  Concurrent read/write operations Concurrent read/write operations  Supports file locking Supports file locking  Memory-mapped file I/O Memory-mapped file I/O

• New Network I/O

New Network I/O  Far more simultaneous connections ar more simultaneous connections  Multiple connections per thread Multiple connections per thread

New File I/O New File I/O

• Buffer: contains sequences of primitive types

Buffer: contains sequences of primitive types  Int.. Byte.. Char.. Double.. other primitives Int.. Byte.. Char.. Double.. other primitives  Bulk data transfer to buffers and arrays Bulk data transfer to buffers and arrays

• Channel: primitive connection to device

Channel: primitive connection to device

• FileChannel: map() - memory-maps files

ileChannel: map() - memory-maps files  lock(position, size, shared) – blocking lock(position, size, shared) – blocking  tryLock() – nonblocking tryLock() – nonblocking  Read/write to arrays of buffers Read/write to arrays of buffers  Bulk data transfer between channels Bulk data transfer between channels  force() – guarantees I/O write to device force() – guarantees I/O write to device

package com.spadt.jdk14; import java.io.*; import java.nio.*; import java.nio.channels.*; /** Simple checksum of a list of files using new java.nio packages */ public class Checksum { public static void main(String[] args) { for(int i = 0; i < args.length; i++) { try { File File = new File(args[i]); FileInputStream is = new FileInputStream(File); FileChannel fc = is.getChannel(); long size = fc.size(); MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, size); int checksum = 0; while(bb.hasRemaining()) { checksum = (checksum * 31) ^ bb.get(); } System.out.println(File.getName() + ": " + checksum); fc.close(); } catch(Exception e) { e.printStackTrace(System.out); } }

from public class Checksum for(int i = 0; i < args.length; i++) { try { File File = new File(args[i]); FileInputStream is = new FileInputStream(File); FileChannel fc = is.getChannel(); long size = fc.size(); MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, size); int checksum = 0; while(bb.hasRemaining()) { checksum = (checksum * 31) ^ bb.get(); } System.out.println(File.getName() + ": " + checksum); fc.close(); } catch(Exception e) { }

New Network I/O New Network I/O

• IPv6: e.g. 1080:0:0:0:8:800:200C:417A

IPv6: e.g. 1080:0:0:0:8:800:200C:417A

• SocketChannel: Non-blocking option

SocketChannel: Non-blocking option  Connect() and finishConnect() Connect() and finishConnect()  Datagram- and ServerSocket- Channel Datagram- and ServerSocket- Channel

• Selector: A channel multiplexor

Selector: A channel multiplexor  channel.register(selector) – notification channel.register(selector) – notification  select(): blocks until channel activity, select(): blocks until channel activity, wakeup(), timeout, thread interrupt wakeup(), timeout, thread interrupt  selectedKeys(): channels with pending I/O selectedKeys(): channels with pending I/O  Enables multiple channels per thread Enables multiple channels per thread

package com.spadt.jdk14; import java.util.Iterator; import java.io.IOException; import java.net.*; import java.nio.*; import java.nio.channels.*; /** Multiplexed connections: Timing of www port opening */ public class Connect { static String[] urls = { "www.ibm.com", "www.microsoft.com", "www.sun.com"}; static Site[] sites = new Site[urls.length]; static Selector sel; static long startTime = 0; static class Site { String msg = "Timeout"; InetSocketAddress addr; SocketChannel chan; long time; Site(String url) throws UnknownHostException { addr = new InetSocketAddress( InetAddress.getByName(url), 80); } } public static void main(String[] args) throws IOException, UnknownHostException { for(int i = 0; i < urls.length; i++) sites[i] = new Site(urls[i]); sel = Selector.open(); for(int i = 0; i < urls.length; i++) { sites[i].chan = SocketChannel.open(); sites[i].chan.configureBlocking(false); sites[i].chan.connect(sites[i].addr); sites[i].chan.register(sel, SelectionKey.OP_CONNECT | SelectionKey.OP_READ, sites[i]); sites[i].time = System.currentTimeMillis(); } while(sel.select(2000) > 0) { Iterator iter = sel.selectedKeys().iterator(); while(iter.hasNext()) { SelectionKey key = (SelectionKey) iter.next(); iter.remove(); Site site = (Site) key.attachment();

Multiplexed connections: Inner class - Site public class Connect { static String[] urls = { "www.ibm.com", "www.microsoft.com", "www.sun.com"}; static Site[] sites = new Site[urls.length]; static Selector sel; static long startTime = 0; static class Site { String msg = "Timeout"; InetSocketAddress addr; SocketChannel chan; long time; Site(String url) throws UnknownHostException { addr = new InetSocketAddress( InetAddress.getByName(url), 80); } }

Multiplexed connections: Initializing Selector public static void main(String[] args) throws IOException, UnknownHostException { for(int i = 0; i < urls.length; i++) sites[i] = new Site(urls[i]); sel = Selector.open(); for(int i = 0; i < urls.length; i++) { sites[i].chan = SocketChannel.open(); sites[i].chan.configureBlocking(false); sites[i].chan.connect(sites[i].addr); sites[i].chan.register(sel, SelectionKey.OP_CONNECT | SelectionKey.OP_READ, sites[i]); sites[i].time = System.currentTimeMillis(); } . . .

Multiplexed connections: Processing Selector while(sel.select(2000) > 0) { Iterator iter = sel.selectedKeys().iterator(); while(iter.hasNext()) { SelectionKey key = (SelectionKey) iter.next(); iter.remove(); Site site = (Site) key.attachment(); if(site.chan.finishConnect()) { key.cancel(); site.msg = "time: " + (System.currentTimeMillis()

• site.time);

site.chan.close(); } } } for(int i = 0; i < sites.length; i++) System.out.println(sites[i].addr.getHostName() + " - " + sites[i].msg); }

New I/O Strategy New I/O Strategy

• Server development: “Must do”

Server development: “Must do”  Far more scalable – not thread-limited ar more scalable – not thread-limited  50 – 100% 50 – 100% performance improvement performance improvement  App servers – will be done for us App servers – will be done for us

• Client development: New development

Client development: New development  Large and composite file processing Large and composite file processing  Entire file, e.g. DOM XML, images, models Entire file, e.g. DOM XML, images, models

• Retrofit: Only as dictated by needs

Retrofit: Only as dictated by needs  Application performance / profiling Application performance / profiling

Java Print Service Java Print Service

• Discovery and selection of available printers

Discovery and selection of available printers  PrintServiceLookup PrintServiceLookup  Selection based on capabilities / properties Selection based on capabilities / properties

• DocF

DocFlavor – specifies destination and format lavor – specifies destination and format  Stream, reader, byte array, URL Stream, reader, byte array, URL  Format: MIME type constants

• rmat: MIME type constants
• Doc object: request attributes and print data

Doc object: request attributes and print data

• DocPrintJob: submits document to printer

DocPrintJob: submits document to printer

• Pluggable print services using spi

Pluggable print services using spi

package com.spadt.jdk14; import java.io.*; import javax.print.*; import javax.print.attribute.*; import javax.print.attribute.standard.*; public class FilePrint { public static void main(String[] args) throws IOException, PrintException { FileInputStream is = new FileInputStream("c:/tmp/p.xml"); DocFlavor flavor = DocFlavor.INPUT_STREAM.TEXT_PLAIN_US_ASCII; Doc doc = new SimpleDoc(is, flavor, null); PrintRequestAttributeSet attrs = new HashPrintRequestAttributeSet(); attrs.add(new Copies(2)); attrs.add(MediaSize.NA.LETTER); PrintService[] printers = PrintServiceLookup .lookupPrintServices(flavor, attrs); if(printers.length > 0) { DocPrintJob job = printers[0].createPrintJob(); job.print(doc, attrs); } else

FileInputStream is = new FileInputStream("c:/tmp/p.xml"); DocFlavor flavor = DocFlavor.INPUT_STREAM.TEXT_PLAIN_US_ASCII; Doc doc = new SimpleDoc(is, flavor, null); PrintRequestAttributeSet attrs = new HashPrintRequestAttributeSet(); attrs.add(new Copies(2)); attrs.add(MediaSize.NA.LETTER); PrintService[] printers = PrintServiceLookup .lookupPrintServices(flavor, attrs); if(printers.length > 0) { DocPrintJob job = printers[0].createPrintJob(); job.print(doc, attrs); } else System.out.println("No printers can print this job");

Logging API Logging API

• Facilitates analysis, application error reporting

acilitates analysis, application error reporting

• Logger: logs application and error messages

Logger: logs application and error messages

• LogRecord: information to be logged

LogRecord: information to be logged

• Handler: Determines destination (1 or more)

Handler: Determines destination (1 or more)  File.. Console.. Stream.. Socket.. Memory.. ile.. Console.. Stream.. Socket.. Memory..

• Formatter: Determines format of info
• rmatter: Determines format of info

 SimpleF SimpleFormatter, XMLF

• rmatter, XMLFormatter
• rmatter
• LogManager: Controls logging configuration

LogManager: Controls logging configuration  Provides default handling – config file Provides default handling – config file

Logger functionality Logger functionality

• Log messages are tagged with a level:

Log messages are tagged with a level:  SE SEVE VERE, WA RE, WARNING, INF RNING, INFO, O, CONF CONFIG, IG, FINE, F INE, FINER, F INER, FINEST INEST  Severe(message), …, finest(message) Severe(message), …, finest(message)  Log(level, message) Log(level, message)

• Additional information in log() methods:

Additional information in log() methods:  Class, method, an object, array of objects, Class, method, an object, array of objects, Throwable, Log(level, message, Object) hrowable, Log(level, message, Object)  System attempts to identify class/method System attempts to identify class/method

Logged inform Logged information ation

• A LogRecord contains attributes that include

A LogRecord contains attributes that include  Level, message, time, logger name, Level, message, time, logger name, message parameters, class * message parameters, class *, method * , method *, thread id, exception details thread id, exception details

• A F

A Formatter formats these fields into a string

• rmatter formats these fields into a string

 SimpleF SimpleFormatter – A string, inserts values

• rmatter – A string, inserts values

 XMLF XMLFormatter – XML using a fixed dtd

• rmatter – XML using a fixed dtd

 Write your own formatter Write your own formatter  A F A Filter includes/excludes based on tests ilter includes/excludes based on tests

package com.spadt.jdk14; import java.util.logging.*; /** Illustrates the new java.util.logging facilities. */ public class SimpleLogging { public static void main(String[] args) { // Set up a logger using all the defaults Logger log = Logger.getLogger("com.spadt.simple"); log.info("starting main"); try { int a = 1 / 0; } catch(Exception e) { log.log(Level.WARNING, "Calculation error", e); } log.info("Completed"); } }

Console Log – Results of SimpleLogging Apr 26, 2002 2:53:40 PM com.spadt.jdk14.SimpleLogging main INFO: starting main Apr 26, 2002 2:53:40 PM com.spadt.jdk14.SimpleLogging main WARNING: Calculation error java.lang.ArithmeticException: / by zero at com.spadt.jdk14.SimpleLogging.main(SimpleLogging.java:13) Apr 26, 2002 2:53:40 PM com.spadt.jdk14.SimpleLogging main INFO: Completed

package com.spadt.jdk14; import java.io.IOException; import java.util.logging.*; /** Illustrates custom java.util.logging functions. */ public class XmlLogging { public static void main(String[] args) throws IOException { // Set up a custom logger Logger log = Logger.getLogger("com.spadt.xml"); FileHandler h = new FileHandler("c:/log/log.xml"); h.setFormatter(new XMLFormatter()); log.addHandler(h); log.setLevel(Level.ALL); try { int a = 1 / 0; } catch(Exception e) { log.log(Level.WARNING, "Calculation error", e); } log.fine("Completed"); }

c:/log/log.xml log file contents – XmlLogging <?xml version="1.0" encoding="windows-1252" standalone="no"?> <!DOCTYPE log SYSTEM "logger.dtd"> <log> <record> <date>2002-04-27T10:33:17</date> <millis>1019917997510</millis> <sequence>0</sequence> <logger>com.spadt.xml</logger> <level>WARNING</level> <class>com.spadt.jdk14.XmlLogging</class> <method>main</method> <thread>10</thread> <message>Calculation error</message> <exception> <message>java.lang.ArithmeticException: / by zero</message> <frame> <class>com.spadt.jdk14.XmlLogging</class> <method>main</method> <line>18</line> </frame> </exception> </record>

Logging Strategy Logging Strategy

• Specify logging.properties entries - each app

Specify logging.properties entries - each app

• Logging config in properties file – not code

Logging config in properties file – not code

• 2 lines of code to use in each class

2 lines of code to use in each class

• System.out.println() aficionados

System.out.println() aficionados  Start using java.util.logging now Start using java.util.logging now

• Log4j users

Log4j users  Both solutions are appropriate Both solutions are appropriate  Same hierarchical / declarative strategy Same hierarchical / declarative strategy  Different keywords for level of detail Different keywords for level of detail

Debugging Features Debugging Features

• Full-speed debugging: for long-running progs

ull-speed debugging: for long-running progs

• Hot-swap: runtime swap of classes

Hot-swap: runtime swap of classes

• Validation of parameters/returns in JNI calls

Validation of parameters/returns in JNI calls

• Debug information for native code crashes

Debug information for native code crashes

• Chained exceptions (like EJBException)

Chained exceptions (like EJBException)

 throw new MyException(msg, cause);

• Garbage collection logging

Garbage collection logging

Preferences API Preferences API

• Can replace Properties in most cases

Can replace Properties in most cases

• Stores application and configuration data

Stores application and configuration data  Standard place for property data Standard place for property data  Storage of data is system-independent Storage of data is system-independent  Facilitates moving to another machine acilitates moving to another machine  You can implement any data store You can implement any data store

• User and system-wide preferences

User and system-wide preferences

• Store application and configuration data

Store application and configuration data

• Typed getters and setters …

yped getters and setters …

Preferences functionality Preferences functionality

• Methods to access values

Methods to access values

 get(String key, String default)  getInt, getBoolean, getDouble, getFloat, Long, getByteArray  put(String key, String value)

• Static methods to retrieve preferences nodes

Static methods to retrieve preferences nodes

 userNodeForPackage() per user/package  systemNodeForPackage() for all users  userRoot().node(name) user info  systemRoot().node(name) config info

package com.spadt.jdk14; import java.io.*; import java.util.prefs.*; /** Access and change User preferences example */ public class Prefs { public void run() throws IOException { BufferedReader in = new BufferedReader( new InputStreamReader(System.in)); Preferences prefs = Preferences.userNodeForPackage(this.getClass()); String greeting = prefs.get("greeting", "sir/madam"); System.out.println("Greetings, " + greeting + “!”); System.out.println("Type your new greeting."); if((greeting = in.readLine()).length() > 0) { prefs.put("greeting", greeting); System.out.println("New greeting saved."); } } public static void main(String[] args) throws IOException { (new Prefs()).run(); } }

Results from running Prefs > java com.spadt.jdk14.Prefs Greetings, sir/madam! Type your new greeting. Bad Dog New greeting saved. > java com.spadt.jdk14.Prefs Greetings, Bad Dog! Type your new greeting. This was added to the Windows Registry: My Computer\HKEY_CURRENT_USER\Software \JavaSoft\Prefs\com\spadt\jdk14 Name: greeting Data: “/Bad /Dog”

package com.spadt.jdk14; import java.io.*; import java.util.prefs.*; /** System preferences example */ public class SysPrefs { public static void main(String[] args) throws IOException { BufferedReader in = new BufferedReader( new InputStreamReader(System.in)); Preferences prefs = Preferences.systemRoot().node("email-settings"); String replyTo = prefs.get("reply-to", ""); System.out.println("Reply-to is now [" + replyTo + "]"); System.out.println("Type updated reply-to."); replyTo = in.readLine(); prefs.put("reply-to", replyTo); System.out.println("New reply-to saved."); } }

Results from running SysPrefs > java com.spadt.jdk14.SysPrefs Reply-to is now [] Type updated reply-to. jack@cheese.com New reply-to saved. > java com.spadt.jdk14.SysPrefs Reply-to is now [jack@cheese.com] Type updated reply-to. This was added to the Windows Registry: My Computer\HKEY_LOCAL_MACHINE\Software \JavaSoft\Prefs\email-settings Name: reply-to Data: “jack@cheese.com”

Object Persistence Object Persistence

• Solves serialization version problems

Solves serialization version problems

• Long-term persistence

Long-term persistence  Independent of serial version Independent of serial version  Works with different JVM’s Works with different JVM’s  Object information saved in xml format Object information saved in xml format

• XMLEncoder and XMLDecoder

XMLEncoder and XMLDecoder  Constructors take input/output streams Constructors take input/output streams  readObject() and writeObject() readObject() and writeObject()  Reads/builds objects using get/set Reads/builds objects using get/set  Object information saved in xml format Object information saved in xml format

package com.spadt.jdk14; import java.io.*; import java.beans.*; import javax.swing.JLabel; public class Persist { public static void main(String[] args) throws IOException { JLabel label1 = new JLabel(); label1.setText("Caption"); label1.setBounds(20, 40, 120, 20); XMLEncoder enc = new XMLEncoder( new FileOutputStream("c:/tmp/p.xml")); enc.writeObject(label1); enc.close(); XMLDecoder dec = new XMLDecoder( new FileInputStream("c:/tmp/p.xml")); JLabel label2 = (JLabel) dec.readObject(); dec.close(); System.out.println(

Contents of the xml file for Persist <?xml version="1.0" encoding="UTF-8"?> <java version="1.4.0" class="java.beans.XMLDecoder"> <object class="javax.swing.JLabel"> <void property="bounds"> <object class="java.awt.Rectangle"> <int>20</int> <int>40</int> <int>120</int> <int>20</int> </object> </void> <void property="text"> <string>Caption</string> </void> </object> </java>

GUI Enhancem GUI Enhancements ents

• New focus architecture

New focus architecture  Fixes bugs, platform incompatibilities ixes bugs, platform incompatibilities  Can now identify who’s focused Can now identify who’s focused

• Mouse wheel support

Mouse wheel support

• Spinner widget

Spinner widget

• Windows 2000 look and feel

Windows 2000 look and feel

• Improved JF

Improved JFileChooser ileChooser

• Much faster 2D rendering

Much faster 2D rendering

• Game support: accelerator cards

Game support: accelerator cards

Swing Drag and Drop Swing Drag and Drop

• D-n-D is not new in 1.4 – just much easier

D-n-D is not new in 1.4 – just much easier

• Two methods of data transfer

wo methods of data transfer  Drag and drop – not just text Drag and drop – not just text  Clipboard transfer: cut, copy, and paste Clipboard transfer: cut, copy, and paste

• Platform independent: Java - Java transfer

Platform independent: Java - Java transfer

• Platform dependent – native implementation

Platform dependent – native implementation  Windows OLE drag-n-drop Windows OLE drag-n-drop  Motif and Mac OS implementations Motif and Mac OS implementations

• Data transfer model based on MIME types

Data transfer model based on MIME types

Drag and Drop operations Drag and Drop operations

• Drag = press mouse button, drag a few pixels

Drag = press mouse button, drag a few pixels

• Automatic support – setDragEnabled()

Automatic support – setDragEnabled()  JColorChooser JColorChooser, JE , JEditor ditorPane, JF ane, JFileC ileChooser hooser, , JList, JT JList, JTab able, e, JT JTextArea, JT extArea, JTextF extField, JT ield, JTree, ee, JT JTextPane, JF extPane, JFormattedT

• rmattedTextF

extField ield

• Handle drag: exportAsDrag()

Handle drag: exportAsDrag()

• Add dnd support – T

Add dnd support – TransferHandler ransferHandler  new T new TransferHandler(“text”) ransferHandler(“text”)  getCutAction(), getPasteAction() getCutAction(), getPasteAction()

package com.spadt.jdk14; import java.awt.event.*; import javax.swing.*; public class DragDrop extends JFrame { public DragDrop() { addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent evt) { System.exit(0); } }); panel.setLayout(null); panel.setPreferredSize(new java.awt.Dimension(340, 72)); labelApe.setBounds(10, 20, 40, 16); panel.add(labelApe); labelBear.setBounds(10, 36, 40, 16); panel.add(labelBear); text.setBounds(60, 20, 260, 30); text.setDragEnabled(true); panel.add(text); getContentPane().add(panel); pack(); }

public static void main(String args[]) { new DragDrop().show(); } private static class DropLabel extends JLabel { public DropLabel(String text) { super(text); setTransferHandler(new TransferHandler("text")); addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent e) { JLabel lbl = (JLabel) e.getSource(); TransferHandler h = lbl.getTransferHandler(); h.exportAsDrag(lbl, e, TransferHandler.COPY); } }); } } private JPanel panel = new JPanel(); private DropLabel labelApe = new DropLabel("Ape"); private DropLabel labelBear = new DropLabel("Bear"); private JTextField text = new JTextField("Drop here"); }

Java Web Start Java Web Start

• Launch full java applications automatically

Launch full java applications automatically  Web browser link to load/run over network Web browser link to load/run over network  Java Web Start application manager Java Web Start application manager  Windows: creates desktop icon Windows: creates desktop icon

• Client systems cache the application code

Client systems cache the application code  Checks server for latest version Checks server for latest version  Runs application from disk Runs application from disk

• Java 2 security model for required privileges

Java 2 security model for required privileges

Java Web Start: Server Prep Java Web Start: Server Prep

• JNLP = Java Network Loading Protocol

JNLP = Java Network Loading Protocol

• Web server: recognize .jnlp file extension

Web server: recognize .jnlp file extension  Apache: Add a directive in httpd.conf Apache: Add a directive in httpd.conf AddT AddType application/x-java-jnlp-file .jnlp ype application/x-java-jnlp-file .jnlp  Restart web server to activate Restart web server to activate

• Create a .jnlp xml file to describe the app

Create a .jnlp xml file to describe the app

• Package jnlp file and all jars onto web server

Package jnlp file and all jars onto web server

Java Web Start: dragdrop.jnlp file <?xml version="1.0" encoding="utf-8"?> <jnlp spec="1.0+" codebase="http://www.accubase.com/java" href="dragdrop.jnlp"> <information> <title>Web Start for DragDrop</title> <vendor>Kirk Spadt</vendor> <homepage href="java/help.html"/> <description>Web Start DragDrop demo</description> <offline-allowed/> </information> <resources> <j2se version="1.4"/> <jar href="dragdrop.jar"/> </resources> <application-desc main-class="com.spadt.jdk14.DragDrop“ /> </jnlp>

Java Web Start: Client Prep Java Web Start: Client Prep

• Do once:

Do once:  Download Java Web Start from Sun: Download Java Web Start from Sun: http://java.sun.com/products/ http://java.sun.com/products/ javawebstart/download-windows.html javawebstart/download-windows.html  Follow the instructions to download the

• llow the instructions to download the

java runtime and Web Start java runtime and Web Start

• To run:
• run:

 Navigate to a link that points to the jnlp file Navigate to a link that points to the jnlp file  The program loads and runs automatically he program loads and runs automatically

• E.g.: www.accubase.com/java/dragdrop.jnlp

E.g.: www.accubase.com/java/dragdrop.jnlp

API’s M API’s Moved into J2SE v1.4

• ved into J2SE v1.4
• JAXP: Java API for XML Processing

JAXP: Java API for XML Processing

• JDBC-2, 2.1 and JDBC 3.0

JDBC-2, 2.1 and JDBC 3.0

• CORBA enhancements

CORBA enhancements

• DNS Service Provider for JNDI

DNS Service Provider for JNDI

• JCE: Java Cryptography Extensions

JCE: Java Cryptography Extensions

• JSSE: Java Secure Socket Extension

JSSE: Java Secure Socket Extension

• JAAS: Java Authentication/Authorization

JAAS: Java Authentication/Authorization

• GSS-API: Kerberos Single sign-on

GSS-API: Kerberos Single sign-on

JAXP : XM JAXP : XML Processing L Processing

• SAX 2.0: Simple API for XML Processing

SAX 2.0: Simple API for XML Processing  org.xml.sax.*

• rg.xml.sax.* - sequential parsers
• sequential parsers

 javax.xml.parsers – Pluggable parsers javax.xml.parsers – Pluggable parsers

• DOM Level 2 – Document Object Model

DOM Level 2 – Document Object Model  org.w3c.dom – Doc model interfaces

• rg.w3c.dom – Doc model interfaces
• XSLT

XSLT – XML Document conversion – XML Document conversion  javax.xml.transform javax.xml.transform

JDBC-2, 2.1, and JDBC 3.0 JDBC-2, 2.1, and JDBC 3.0

• JD

JDBC-2 2 (javax. avax.sql sql) is s incl ncluded uded now now  Dat ataS aSour

• urce:

ce: access access thr hrough

• ugh JN

JNDI  Row

• wSet

et: caches caches resul esult set set on

• n cl

client ent  Scr crol

• llabl

able e resul esult set sets s (cur cursor sors) s)  Bat atch ch updat updates: es: mul ultipl ple e sql sql st stat atem ement ents

• JD

JDBC 3. 3.0 0 new new feat eatur ures es added added to

• J2S

J2SE 1. 1.4  Pool

• oled

ed dat datasour asources ces and and st stat atem ement ents  Mul ultipl ple e resul esult set sets  Updat pdate e BLO LOB, CLO LOB, ar array, ay, Ref ef’s  Dat ata a types: ypes: BOOLE LEAN, DATA TALI LINK, UDT  Savepoi avepoint nt suppor support – – rest estor

• re

e to

• mul

ultipl ple e savepoi savepoint nts

CORBA Enhancem CORBA Enhancements ents

• POA –

– Por

• rtabl

able e Obj bject ect Adapt dapter er suppor support  Obj bject ects s por portabl able e acr across

• ss CORBA impl

pl

• INS –

– Int nter eroper

• perabl

able e Nam aming ng Ser ervi vice ce  Resol esolve ve ser servi vices ces usi using ng nam name e st strings ngs  URLs Ls for

• r CORBA obj
• bject

ect ref efer erences ences

• GIOP: Gener

eneral al IIOP – – gener general al wire e pr prot

• tocol
• col
• Dynam

ynamic c Anys: nys: runt untime e type ype di discover scovery

• ORBD: An

n Obj bject ect request equest br broker

• ker daem

daemon

• n

impl plem ement entat ation

• n

JNDI DNS Service Provider JNDI DNS Service Provider

• Allow
• ws

s JN JNDI appl applicat cations

• ns to
• access

access DNS

• Impl

plem ement ents s RFC FC-1034 1034 and and 1035 1035

• URL

L : dns: dns://ns. ns.who. ho.com com:53/ 53/dom domai ain. n.to.

• .find.

nd.com com

• Ret

etrieve eve at attribut butes es usi using ng di direct ector

• ry

y cont context ext: Hasht ashtabl able e env env = new new HashTabl ashTable( e(); env. env.put put(“java. ava.nam naming. ng.pr provi

• vider

der.ur url”, “dns: dns://ns. ns.myi yisp. sp.com com/ser server ver.com com”); DirCont

• ntext

ext c c = new new Ini nitial alDirCont

• ntext

ext(env) env); Attribut butes es at attr = c. c.get getAttribut butes( es(“host host” new new String[ ng[] {“A”}));

• Ret

etrieves eves ip p addr address ess for

• r host

host.ser server ver.com com

JCE: Java Cryptography JCE: Java Cryptography

• Crypt

yptogr

• graphy

aphy engi engines nes  Message essage di digest gests s (hashes) hashes)  Signat gnatur ures es (si sign gn and and ver verify) y)  Key ey pai pair gener generat ation

• n (publ

public/ c/pr privat vate) e)  Cer ertificat cates es (used used to

• aut

authent henticat cate e ident dentities) es)  Key ey st stor

• res

es ( a a dat database abase of

• f publ

public/ c/pr privat vate e keys) keys)  Random andom gener generat ator

• r
• New

ew in n J2S J2SE 1. 1.4  Cer ertificat cate e pat path h bui builder der (cer cert chai chains) ns)  Cer ertificat cate e pat path h val validat dator

• r

 Cer ertificat cate e st stor

• re

JSSE: Java Secure Socket JSSE: Java Secure Socket

• Impl

plem ement ents s secur secure e com communi unicat cation

• n with

h SSL

• SSL

L (cl client ent) and and ser server ver socket sockets

• Key

ey and and trust ust manager anager int nter erfaces aces (X.509) 509)

• Secur

ecure e HTTP TTP URL L connect connections

• ns
• Publ

ublic c key key cer certificat cate e API

• SunJS

unJSSE pr provi

• vider

der impl plem ement entat ation

• n

 RSA suppor support  SSL L 3. 3.0 0 and and TLS TLS 1. 1.0  Most

• st com

common

• n ci

cipher pher sui suites es  RSA, DES, DES3, 3, DES40, 40, RC4, 4, SHA, MD5 5 com combi binat nations

• ns ar

are e impl plem ement ented. ed.

JAAS: Authentication/Authorization JAAS: Authentication/Authorization

• Aut

uthent henticat cation:

• n: Who

Who ar are e you, you, real eally? y?

• Aut

uthor horizat zation:

• n: What

What will I al allow

• w you

you to

• do?

do?

• PAM: Pluggabl

uggable e aut authent henticat cation

• n modul
• dule

 Add dd aut auth h without hout changi changing ng appl applicat cation

• n
• Access

ccess cont control

• l in

n 1. 1.4 4 now now based based on:

• n:

 CodeS

• deSour
• urce:

ce: code code locat

• cation
• n and

and si signer gners  Princi ncipal pal: Repr epresent esents s a a Subj ubject ect at at si signon gnon  Subj ubject ect: User ser (Princi ncipal pal(s) s) and and cr credent edential als) s)  Per ermissi ssion:

• n: What

What you you can can do do  Pol

• licy:

cy: gr grant ants s use use of

• f CodeS
• deSour
• urce

ce to

• Princi

ncipal pal

Item Items Deferred to J2SE 1.5 s Deferred to J2SE 1.5

• JSR-014 Generic T

JSR-014 Generic Types ypes

 List<String> list = Arrays.asList(args) String argZero = list.get(0);

• JSR-051 printf/scanf capabilities

JSR-051 printf/scanf capabilities

• JSR-076 RMI Security for J2SE

JSR-076 RMI Security for J2SE

• JSR-078 RMI Custom Remote References

JSR-078 RMI Custom Remote References

• JSR-031 XML Data Binding Specification

JSR-031 XML Data Binding Specification

• XML: JAXM, JAXR

XML: JAXM, JAXR

• Additional Swing and 2D performance

Additional Swing and 2D performance

Philly Java Users Group

Kirk k B. Spadt padt

What’s new in What’s new in Java 2 Standard Edition 1.4 Java 2 Standard Edition 1.4

ki kirk@ k@spadt spadt.com com