-jar option and the modulepath (original) (raw)

Alan Bateman Alan.Bateman at oracle.com
Fri Nov 23 08:06:23 UTC 2018

On 22/11/2018 19:27, Richard Hillegas wrote:

Can I scribble something in a jar file manifest which will cause "java -jar" to boot with a modulepath rather than a classpath? I do not see any support for a modulepath attribute in the Java 9 jar file documentation at https://docs.oracle.com/javase/9/docs/specs/jar/jar.html. My sense is that the -jar option commits the JVM to using a classpath. There is no support for executable modular JARs at this time. It's part of a bigger topic that is tracked as #MultiModuleExecutableJARs. Some prototypes during JDK 9 but the decision at the time was to defer it to some future effort. So when you run with java -jar then it puts the JAR file on the class path (exactly as it did in all previous releases).

-Alan

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