Is there any way to get list of directories which are included in module-path with use of -p or --module-path arguments at runtime similar to how I whold get all classpath directories using System.getProperty("java.class.path")?
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Naman
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Artem Petrov
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Why do you need the `modulepath`? What use case do you have? – ZhekaKozlov May 26 '18 at 15:00
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@ZhekaKozlov Just for debug purposes – Artem Petrov May 26 '18 at 15:21
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4The system property is `jdk.module.path`, documented in System.getProperties(). For completeness, you may want to look at the value of `jdk.module.upgrade.path`, also documented in System.getProperties(). – Alan Bateman May 26 '18 at 16:04
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@AlanBateman But why I don't have such systems properties even when `--module-path` was actually used? I am using java.runtime.version=9+181 – Artem Petrov May 27 '18 at 06:32
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From Javadoc of System.getProperties:
In addition to the standard system properties,
the system properties may include the following keys:
Key Description of Associated Value
jdk.module.path The application module path
jdk.module.upgrade.path The upgrade module path
jdk.module.main The module name of the initial/main module
jdk.module.main.class The main class name of the initial module
So you should use System.getProperty("jdk.module.path")
ZhekaKozlov
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2A better way would be [as suggested by Alan](https://stackoverflow.com/questions/50543982/inspect-module-path-value-at-runtime#comment88100258_50543982) – Naman May 26 '18 at 16:18