Eclipse uses path variables in build configuration scripts to create portable projects.
Environment variables are defined within a hierarchy, which defines each one’s scope of access.
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The operating system. These are the current user’s environment variables (UserDomain.UserName). For Example,
USERNAME = Chris
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The Eclipse IDE and the Java Virtual Machine ( referred to as System Properties of the Java Platform). To maximize portability, never refer to an environment variable when the same value is available in a System Property. For example, if the operating system provides a user name, it will always be available in the system property user.name.
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The current Workspace in Eclipse.
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The current Project within the current workspace. These are the environment variables that the build configuration can access directly. For example,
Path: /java_3rdParty
To see and create Path Variables for a particular java project:
- Right-click the java project in Project Explorer, and click Properties.
- Navigate to Resources > Linked Resources > Path Variables.
Use PROJECT_LOC as a starting point, and create
JAVADOC_LOC = ${PROJECT_LOC}\doc LIBRARIES_LOC = ${PROJECT_LOC}\libs SOURCE_LOC = ${PROJECT_LOC}\src
Note: To use these in an Ant script, you have to define and assign equivalent local variables.
5 replies on “Java Path, System, and Environment Variables”
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