where to find jars : Java Glossary

where to find jars

This table should help you locate missing jars. To use a jar, it usually must be mentioned on the classpath or put in the ext directory. For Servlet wombs, there may be special project-specific places to put them. If the jar you are looking for is not in this list, check the C:\Program Files\java\jre7 /lib and C:\Program Files\java\jre7/ext directories. Please email me with suggestions for additions to this table. Use your browser local search button to find the package or jar name of interest in the following table. Only the higher order package names are shown, not the full trees.

Where to find Jars
Acronym	Name	Package	Jar	Download URL (Uniform Resource Locator)
JAAS	JAAS (Java Authentication and Authorisation Service)	com.sun.security.auth javax.security.auth	rt.jar jaas.jar	bundled with JRE (Java Runtime Environment). Pluggable interface. Also bundled with jwsdp.
JAF	JAF (Java Activation Framework) (MIME (Multipurpose Internet Mail Extensions))	com.sun.activation javax.activation	activation.jar	http://java.sun.com/products/javabeans/glasgow/jaf.html
JAI	JAI (Java Advanced Imaging)	com.sun.media.jai javax.media.jai	jai_codec.jar jai_core.jar	http://java.sun.com/products/java-media/jai/
JavaMail	Java Mail	com.sun.mail javax.mail	imap.jar mailapi.jar pop3.jar smtp.jar	http://www.oracle.com/technetwork/java/javamail/index-138643.html
JAXP	JAXP (Java Api for XML Processing)	javax.xml com.sun.org.apache.xerces.internal.impl	rt.jar jaxp.jar	Includes all kinds of XML (extensible Markup Language), SAX (Simple API for XML), DOM (Document Object Model), XSD (XML Scheme Definition) etc. classes and the Xerces implementation. Bundled with JDK (Java Development Kit) 1.5+. Also bundled with resin. Oracle’s Technote Guide on JAXP for recent JDKs : available: on the web at Oracle.com in the current JDK 1.7.0_04 on your local Windows J: drive. Oracle’s Miscellaneous documentation on JAXP for early JDKs
JCE	(Java Cryptography Extension)	javax.crypto	jce.jar	bundled with JRE. Pluggable interface with default implementation.
JDBC	JDBC (Java Data Base Connectivity) (SQL (Standard Query Language))	java.sql	rt.jar	Bundled with the JRE. It requires a companion specific JDBC plug-in implementation that comes from the JDBC/SQL vendor with vendor specific package names.
JMF	(Java Media Framework) (streaming audio and video)	com.sun.media codecLib.mpa com.ibm.media com.sun.media javax.media jmapps	customizer.jar jmf.jar mediaplayer.jar multiplayer.jar sound.jar	http://java.sun.com/products/java-media/jmf/
JNDI	(Java Naming and Directory Interface) (DNS (Domain Name Service) lookup, Email server lookup, LDAP (Lightweight Directory Access Protocol), NIS (Network Information Service), NDS (Novell Directory Services), RMI (Remote Method Invocation) and CORBA (Common Object Request Broker Architecture))	com.sun.naming javax.naming	rt.jar jndi.jar	comes bundled JRE, also jndi.jar with Caucho Resin.
JSAPI	(Java Speech Application Programming Interface)	javax.speech	freetts.jar	You need an implementation of the plug-in from a vendor other than Sun. Oracle’s Product Info on Sun’s Vendor List . Most appear to have discontinued or sidelined JSAPI (Java Speech Application Programming Interface). The most promising is FreeTTS.
JTA	(Java Transaction Application programming interface)	javax.transaction	jta.jar	http://java.sun.com/products/jta/
JWSDP	(Java Web Services Developer Pack)	javax.xml.*	many jars	Oracle’s Technetwork JWSDP download Includes JAX, JAXP, JAXB (Java Api for XML data Binding), JAXWS.
Servlet	HTTP (Hypertext Transfer Protocol) transaction processing	javax.servlet	servlet.jar	The real classes come with your Servlet womb. They are not plug-ins the way most other packages are.

Finding Classes

If the class you are looking for is on the classpath, you can find out which directory or jar or URL it came from with

To discover what your program is using as the classpath use:

classpath
JAAS
JAF
JAI
JavaMail
JCE
JDBC
JDK
JMF
JNDI
JRE
JTA
path
pathtool: student project
ProtectionDomain
Servlet
servlet womb
web container
Where to find classes
which: student project

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