Java - Revision history

Mbaney at 13:39, 23 October 2024

2024-10-23T13:39:23Z

← Older revision		Revision as of 13:39, 23 October 2024
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	Java can be obtained in one of two flavors: Java Runtime Environment (JRE) or Java Development Kit (JDK). Unless you do programming in Java, JRE is usually sufficient for running programs and applets written in Java. JRE is also included in JDK so there is no need to install both. There are two main flavors of Java that we have support for [http://www.oracle.com/us/technologies/java/overview/index.html Oracle Java] and [http://openjdk.java.net/ OpenJDK].		Java can be obtained in one of two flavors: Java Runtime Environment (JRE) or Java Development Kit (JDK). Unless you do programming in Java, JRE is usually sufficient for running programs and applets written in Java. JRE is also included in JDK so there is no need to install both. There are two main flavors of Java that we have support for [http://www.oracle.com/us/technologies/java/overview/index.html Oracle Java] and [http://openjdk.java.net/ OpenJDK].

	==RHEL/Ubuntu==		==[[RHEL]]/[[Ubuntu]]==
	The version of Java running can be checked by running the following command on any RHEL/Ubuntu machine. Alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>. <pre>bash-4.2$ java -version</pre>		The version of Java running can be checked by running the following command on any RHEL/Ubuntu machine. Alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>. <pre>bash-4.2$ java -version</pre>

	==Windows==		==[[Windows]]==
	JRE is installed on all supported workstations by default and auto-updated to the latest version periodically. If for some reason your machine does not have Java, you may send a request to [mailto:staff@umiacs.umd.edu staff] to have JRE or JDK installed on your machine.		JRE is installed on all supported workstations by default and auto-updated to the latest version periodically. If for some reason your machine does not have Java, you may send a request to [mailto:staff@umiacs.umd.edu staff] to have JRE or JDK installed on your machine.

Mbaney at 20:19, 8 September 2016

2016-09-08T20:19:52Z

← Older revision		Revision as of 20:19, 8 September 2016
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	Java can be obtained in one of two flavors: Java Runtime Environment (JRE) or Java Development Kit (JDK). Unless you do programming in Java, JRE is usually sufficient for running programs and applets written in Java. JRE is also included in JDK so there is no need to install both. There are two main flavors of Java that we have support for [http://www.oracle.com/us/technologies/java/overview/index.html Oracle Java] and [http://openjdk.java.net/ OpenJDK]. For the Java6 spec OpenJDK was not the same codebase and had some issues with some code that would run in the normal Oracle Java6 JVM. The Java7 versions of OpenJDK is much closer if not the same codebase for Oracle Java and OpenJDK.		Java can be obtained in one of two flavors: Java Runtime Environment (JRE) or Java Development Kit (JDK). Unless you do programming in Java, JRE is usually sufficient for running programs and applets written in Java. JRE is also included in JDK so there is no need to install both. There are two main flavors of Java that we have support for [http://www.oracle.com/us/technologies/java/overview/index.html Oracle Java] and [http://openjdk.java.net/ OpenJDK].

	~~'''Note''': Support for Sun~~ JDK ~~1.6.0 has ended~~ and ~~we will~~ be ~~purged from UMIACS supported systems~~ in ~~March 2013 due to many security vulnerabilities. This does not impact the OpenJDK 1.6~~.~~0 versions as they are still maintained at this point~~.		==RHEL/Ubuntu==
			The version of Java running can be checked by running the following command on any RHEL/Ubuntu machine. Alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>. <pre>bash-4.2$ java -version</pre>

	=~~RHEL~~=		==Windows==
	~~The default Java on these systems currently is Oracle Java 1.7.0. We additionally have support for OpenJDK 1.6.0. The alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>.~~		JRE is installed on all supported workstations by default and auto-updated to the latest version periodically. If for some reason your machine does not have Java, you may send a request to [mailto:staff@umiacs.umd.edu staff] to have JRE or JDK installed on your machine.

	=~~Ubuntu~~=
	~~The~~ default ~~Java on Ubuntu systems is OpenJDK 1.6.0~~ and ~~1.7.0 is available in~~ the ~~default repositories~~.

	~~=Windows=~~
	~~For PCs~~, you may send a request to [mailto:staff@umiacs.umd.edu staff] to have JRE or JDK installed on your machine.

Jlent at 14:24, 27 June 2014

2014-06-27T14:24:52Z

← Older revision		Revision as of 14:24, 27 June 2014
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	=RHEL=		=RHEL=
	The default Java on these systems currently is ~~Sun Java 1.6.0 which will be replaced by~~ Oracle Java 1.7.0 ~~in March 2013~~. We additionally have support for OpenJDK 1.6.0. The alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>.		The default Java on these systems currently is Oracle Java 1.7.0. We additionally have support for OpenJDK 1.6.0. The alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>.

	=Ubuntu=		=Ubuntu=

Derek at 15:44, 8 March 2013

2013-03-08T15:44:45Z

← Older revision		Revision as of 15:44, 8 March 2013
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	=RHEL=		=RHEL=
	The default Java on these systems currently is Sun Java 1.6.0 which will be replaced by Oracle Java 1.7.0 in March 2013. We additionally have ~~available~~ OpenJDK 1.6.0 ~~which is shipped and is currently at version 1.6.0 on RHEL5 and RHEL6~~. The alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>.		The default Java on these systems currently is Sun Java 1.6.0 which will be replaced by Oracle Java 1.7.0 in March 2013. We additionally have support for OpenJDK 1.6.0. The alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>.

	=Ubuntu=		=Ubuntu=

Derek at 15:44, 8 March 2013

2013-03-08T15:44:07Z

← Older revision		Revision as of 15:44, 8 March 2013
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	=RHEL=		=RHEL=
	The default Java on ~~the system~~ currently Sun Java 1.6.0 which will be replaced by Oracle Java 1.7.0 in March 2013. We additionally have available OpenJDK 1.6.0 which is shipped and is currently at version 1.6.0 on RHEL5 and RHEL6. The alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>.		The default Java on these systems currently is Sun Java 1.6.0 which will be replaced by Oracle Java 1.7.0 in March 2013. We additionally have available OpenJDK 1.6.0 which is shipped and is currently at version 1.6.0 on RHEL5 and RHEL6. The alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>.

	=Ubuntu=		=Ubuntu=

Derek: /* RHEL */

2013-03-08T15:43:43Z

RHEL

← Older revision		Revision as of 15:43, 8 March 2013
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	=RHEL=		=RHEL=
	The default Java on the system currently Sun Java 1.6.0 which will be replaced by Oracle Java 1.7.0 in March 2013. We additionally have available OpenJDK 1.6.0 which is shipped and is currently at version 1.6.0 on RHEL5 and RHEL6.		The default Java on the system currently Sun Java 1.6.0 which will be replaced by Oracle Java 1.7.0 in March 2013. We additionally have available OpenJDK 1.6.0 which is shipped and is currently at version 1.6.0 on RHEL5 and RHEL6. The alternative JDK and JRE options can be found in <tt>/usr/lib/jvm</tt>.

	=Ubuntu=		=Ubuntu=

Derek: Derek moved page JavaVersions to Java

2013-03-08T15:41:45Z

Derek moved page JavaVersions to Java

← Older revision	Revision as of 15:41, 8 March 2013
(No difference)

Derek at 15:41, 8 March 2013

2013-03-08T15:41:37Z

← Older revision		Revision as of 15:41, 8 March 2013
Line 1:		Line 1:
	Java can be obtained in one of two flavors: Java Runtime Environment (JRE) or Java Development Kit (JDK). Unless you do programming in Java, JRE is usually sufficient for running programs and applets written in Java. JRE is also included in JDK so there is no need to install both.		Java can be obtained in one of two flavors: Java Runtime Environment (JRE) or Java Development Kit (JDK). Unless you do programming in Java, JRE is usually sufficient for running programs and applets written in Java. JRE is also included in JDK so there is no need to install both. There are two main flavors of Java that we have support for [http://www.oracle.com/us/technologies/java/overview/index.html Oracle Java] and [http://openjdk.java.net/ OpenJDK]. For the Java6 spec OpenJDK was not the same codebase and had some issues with some code that would run in the normal Oracle Java6 JVM. The Java7 versions of OpenJDK is much closer if not the same codebase for Oracle Java and OpenJDK.

	~~Versions available~~		'''Note''': Support for Sun JDK 1.6.0 has ended and we will be purged from UMIACS supported systems in March 2013 due to many security vulnerabilities. This does not impact the OpenJDK 1.6.0 versions as they are still maintained at this point.

	* JDK 1.6.0~~: /opt/jdk1.6.0~~		=RHEL=
	* JDK 1.5.0~~: /opt/jdk1.5~~.0*		The default Java on the system currently Sun Java 1.6.0 which will be replaced by Oracle Java 1.7.0 in March 2013. We additionally have available OpenJDK 1.6.0 which is shipped and is currently at version 1.6.0 on RHEL5 and RHEL6.
	* JRE 1.4.~~1: /opt/j2re-~~1.4.1
	* JDK 1.4.1: /opt/j2sdk-1.4.1
	* JDK 1.3.0: /opt/j2sdk1_3_0_02

	~~'''NOTE''' Some versions may not be installed~~ on ~~all our supported OSs~~. ~~We will not be installing~~ 1.~~3 or before on any newer OSs~~. ~~Please also note that there are sometimes many minor version numbers~~ in the ~~directories~~.		=Ubuntu=
			The default Java on Ubuntu systems is OpenJDK 1.6.0 and 1.7.0 is available in the default repositories.

	For PCs, you may send a request to [mailto:staff@umiacs.umd.edu staff] to have JRE or JDK installed on your machine~~. Please specify whether you would like JRE or JDK and the version number~~.		=Windows=
			For PCs, you may send a request to [mailto:staff@umiacs.umd.edu staff] to have JRE or JDK installed on your machine.

Derek at 18:43, 6 March 2007

2007-03-06T18:43:41Z

New page

Java can be obtained in one of two flavors: Java Runtime Environment (JRE) or Java Development Kit (JDK). Unless you do programming in Java, JRE is usually sufficient for running programs and applets written in Java. JRE is also included in JDK so there is no need to install both.

Versions available

* JDK 1.6.0: /opt/jdk1.6.0
* JDK 1.5.0: /opt/jdk1.5.0*
* JRE 1.4.1: /opt/j2re-1.4.1
* JDK 1.4.1: /opt/j2sdk-1.4.1
* JDK 1.3.0: /opt/j2sdk1_3_0_02

'''NOTE''' Some versions may not be installed on all our supported OSs. We will not be installing 1.3 or before on any newer OSs. Please also note that there are sometimes many minor version numbers in the directories.

For PCs, you may send a request to [mailto:staff@umiacs.umd.edu staff] to have JRE or JDK installed on your machine. Please specify whether you would like JRE or JDK and the version number.