Java in Gentoo: Difference between revisions
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== Libraries (JAR) locations | = Installing a JDK = | ||
* For some applications, you may need the jce USE flag set for the sun-jdk (Java Cryptography Extension). Note that emerging sun-jce-bin is not enough. | |||
= Libraries (JAR) locations = | |||
* Java packages are VERY often SLOTed. | * Java packages are VERY often SLOTed. | ||
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* If a package is SLOTed, the jar go to /usr/share/package-name-SLOT/package-name.jar. Note that in the JAR there should not be any version number. Beware that some old/badly written ebuilds can forget to specify a SLOT, thus, the jar end in /usr/share/package-name/package-name.jar. This can be confusing when using java-config -p which report the location of the JAR (since it may mask the fact that another version of the package exist). | * If a package is SLOTed, the jar go to /usr/share/package-name-SLOT/package-name.jar. Note that in the JAR there should not be any version number. Beware that some old/badly written ebuilds can forget to specify a SLOT, thus, the jar end in /usr/share/package-name/package-name.jar. This can be confusing when using java-config -p which report the location of the JAR (since it may mask the fact that another version of the package exist). | ||
= Classpath = | |||
* The java command on Gentoo honors the CLASSPATH variable. So often the best way to specify the classpath is via this variable. | * The java command on Gentoo honors the CLASSPATH variable. So often the best way to specify the classpath is via this variable. | ||
Revision as of 20:17, 16 December 2009
Installing a JDK
- For some applications, you may need the jce USE flag set for the sun-jdk (Java Cryptography Extension). Note that emerging sun-jce-bin is not enough.
Libraries (JAR) locations
- Java packages are VERY often SLOTed.
- If a package is SLOTed, the jar go to /usr/share/package-name-SLOT/package-name.jar. Note that in the JAR there should not be any version number. Beware that some old/badly written ebuilds can forget to specify a SLOT, thus, the jar end in /usr/share/package-name/package-name.jar. This can be confusing when using java-config -p which report the location of the JAR (since it may mask the fact that another version of the package exist).
Classpath
- The java command on Gentoo honors the CLASSPATH variable. So often the best way to specify the classpath is via this variable.