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\jre6/lib and C:\Program Files\java\jre6/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
JAAS	Java Authentication and Authorization Service	com.sun.security.auth javax.security.auth	rt.jar jaas.jar	bundled with JRE. Pluggable interface. Also bundled with jwsdp.
JAF	Java Activation Framework (MIME)	com.sun.activation javax.activation	activation.jar	http://java.sun.com/products/javabeans/glasgow/jaf.html
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://java.sun.com/products/javamail/
JAXP	Java API for XML Processing	javax.xml com.sun.org.apache.xerces.internal.impl	rt.jar jaxp.jar	Includes all kinds of XML, SAX, DOM, XSD etc. classes and the Xerces implementation. Bundled with JDK 1.5+. Also bundled with resin. Sun’s JDK Technote Guide on JAXP for recent JDKs : available: on the web at java.sun.com in the current JDK 1.6.0_17 on your local Windows J: drive. Sun’s Glassfish community webservice: JAXP for early JDKs
JCE	Java Cryptography Extensions	javax.crypto	jce.jar	bundled with JRE. Pluggable interface with default implementation.
JDBC	Java Data Base Connectivity (SQL)	java.sql	rt.jar	Bundled with the JRE. It requires a companion specific JDBC plugin 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 lookup, Email server lookup, LDAP, NIS, NDS, RMI and CORBA)	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 plugin from a vendor other than Sun. Sun’s Product Info on Sun’s Vendor List . Most appear to have discontinued or sidelined JSAPI. The most promising is FreeTTS.
JTA	Java Transaction API	javax.transaction	jta.jar	http://java.sun.com/products/jta/
JWSDP	Java Web Services Developer Pack	javax.xml.*	many jars	Sun’s Glassfish community webservice: JWSDP download Includes JAX, JAXP, JAXB, JAXWS.
Servlet	HTTP 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 code like this:

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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