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What are optional packages?

Started by NAREN, Sep 30, 2008, 08:37 PM

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What are optional packages?

Optional Packages are created by Java developers much like any other Java code. Optional Packages are then made available to the Java Virtual Machine.
Java classes stored within Optional Packages can be used by the JVM without the need to be explicitly included in the CLASSPATH.
Optional Packages are usually stored in JAR files.

In earlier versions of Java, Optional Packages were known as Standard Extensions.

Installed Optional Packages

Installed Optional Packages are optional packages which have been copied into the JRE or JVM.

JAR files containing Installed Optional Packages are copied into the lib/ext subdirectory.

Download Optional Packages

Download Optional Packages are optional packages which are loaded from outside the JRE/JVM file structure via a Class-Path header in a Manifest file.
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