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Internet???????????????????RPC/COM/CORBA??????;??????Web??ÿ??hWeb?ãSun?Sun ONEOpen Net Environment ?Microsoft?.NETWeb ?
Sun ONE??Java?gJ2SE/J2EE/J2MEh??i???Sun?iPlanet?????LDAP?¼?Forte for Java???Java ??????ú'ðJava ?Java??Application Server??????Sun ONE???Web?????????

Java????h??:??õJ2EEJava 2 Enterprise Edition?PC?õJ2SEJava 2 Standard Edition???J2MEJava 2 Micro Edition?lSun ONEJava?áJ2SE/J2EE/J2MEh??

J2EE?

J2EESun??h?¸g???L?óg?o

J2EEg

J2EE?ñg?J2EE Blueprints?h??J2EE?õj???g???L??Z????????

J2EE?ñg?????L????????????????????????????L?????

J2EE??

J2EE??J2EE?õi?J2EE?hJ2EE?????i?IETF?CORBA?gµJ2EE??JavaBeang??JavaBeang?Java???¼Java?

J2EE?EJB????û??J2EE?Enterprise JavaBeans????ú??J?Enterprise JavaBeans?????APIJ2EE????

EJB?h??????????????????EJB????l?Beans?g

J2EE?h?L????

1.J2EE Application Programming Modelh????ûi?g?

2. J2EE Platformh???J2EE?ó???h??L???

3. J2EE Compatibility Test Suiteh?????J2EE???

4.J2EE Reference Implementation?J2EE

J2EE

SunJ2EE?Java ?¼??JNDI?HTTPEnterprise JavaBeans???¼JNDIJava??h???????¼?Java?g?h???ãLDAP

J2EEJava ServletJava Servlet???h??????Web?õg??kCGI??Java Servleth?Web?l??gJava?g?Java API?????JDBC API

JSPJava Servleth?Java Servlet???L?Web?JSP?h?L'ô???g???HTMLXML??

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J2EE??h??L?????????????J2EE???h?????ó?????????'?L??????i???J2EE?ó???????û????jû??l??S?û?I?'?ó???j????

J2EE ??Java??õ??ó??????????ó±?

1.Enterprise JavaBeans Architecture?JavaBeans h?ó??'??????g??ó

2.JavaServer PagesJSP ?h????k??????Web?ó????ó????g?JSPASP??ASP????

3.Java Servlet??ó??????????????CGI

4.J2EE Connector?h?????????

5.Java Naming and Directory Interface(JNDI)Java ??????JNDI??h?i???'JNDI???¼??Java ?ó

6.Java Interface Definition Language(JIDL),?'CORBA???JIDLhIDL-to-Java ?IIOPInternet Inter-Orb ProtocolORB

7.JDBC,?????hL??????????

8.Java Message Service(JMS)?????????PUSS/PULL?ã??h???

9.Java Transaction API(JTA)????????ó?h?L?

10.JavaMail,JavaMail?ó??hg'?????JavaMail?'??ó

11.RMI-IIOP,'??Java Java RMI???????

J2EE'ù?l??g?.earlJ2EE?ó.jarEnterprise Bean?h.earlh.xmll??h.jar.warlh.jarl?k???Enterprise bean.classl

J2EE?ó?????1.Enterprise Bean2.Web Component3.J2EE?ó??4.J2EE?ó?J2EE???

BEA WebLogic Server 6.0Borland App ServerHP Bluestone Total-e-ServerIBM WebSphere Application ServerIONA iPortal Application ServeriPlanet Application ServerMacromedia JRun ServerOracle 9i Application ServerSilverStrean Application ServerSybase EAServerTogetherSoft ControlCenterJava 2 SDK Enterprise Edition

J2ME?

J2MEJava 2 Platform Micro Edition????gJVM?API?API??J2SEJava 2 Standard Editon)gJ2ME h???'û?????????'÷??ó

J2ME??Java 2 ???'????????PDA??????J2ME??Javah?????????'h???IJavax.microedition.io ?J2SE?J2MEJ2SEJ2EE

J2ME?j??JavaJava Card??JavaEmbedded Java??JavaReal Time Java?JavaSIM????Java?J2ME???????JavaûJavaVMVirtual Machine???û????û?õAPI????JavaIBM???Java????g??????J2ME

?hJ2ME??Java???

1.??Java??

2.?

3.Java??

4.??ã

5.J2ME???ÿ?J2SEJ2EE

J2MEú?

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1.JVM????hJ2MEã?JVM

2.ò?û??h???????????Java??Java????ò????'Java?g??

3.??û?ó???g?????Java??Java????ò??g????????????ó????h?????

J2ME??JVMòÿh?L?????òL????API???µ?ó???µJava???L????J2ME??????òVMJCPJava Community Process?????JCPK?J2ME?jhò???á?Connected Device Configurationõ?Java??VM?????????????????J2MEá??áCLDC

KVMJ2MElh????JVM?????????????h?1632?J128KB??KVM??õ????????K??lj?J???ó???

CLDC

CLDC?Java??????g??g?160512K?CLDCKVM?????????õ????g'CLDC??w?

1.???Javah???ó?????

2.?????g?????ó?????CLDC??š

3.??Java ?h?

J2SE?CLDC??

1.AWT???Swing???

2.û?

3.??

4.ã

5.RMI

6.Reflection??

CLDC?java.langjava.utiljava.iojavax.microeditionjavax.microedition?lJ2SEl?CLDC?J2SE?jh???ò?????

J2ME:Connected Device Configuration(?ãCDC)??Connected Limited Device Configuration(?ãCLDC)

J2SE?

Java 2?h??????????ó?L?J2SE?????ó?J2SE 1.4??Java???I?ggµ??Java???????

J2SE 1.4 ??

1.õl?

J2SE 1.4h?ÿ???????JavaJavaJ??J2SE 1.4???????????Java????J2SE 1.4Java??÷õ?SwingJava??ó?û(GUI)????

2.??

J2SE 1.4h????'hgw??????

3.?Web

J2SE 1.4jJ2SE??J2SE 1.4SSLLDAPCORBA??????????????LJ2SE 1.4?XMLh????????J??J2SE 1.4Java Web Services Developer PackL????Web?

4.

J2SE 1.4?h???h??L??á??ÿ????J2SE 1.4µGUI???Java 2DT?????????µ??Windows XP????

?J2SE 1.4?????Java??ó?k?ó?J2SE 1.4?J2MELJ2EE??z

Java???ú???k???Java?h???õ??á?L?Java??h??J2EE???PChõJ2SE?;??z?õKJ2ME?????J2SE?i???????J2SE?gSJ2SE?J2EE?g?????J2SEI??õ???h?g?Sh?J2SEL???J2ME???hJ2SEh??õ???g