The remedy is install mvn 3.3.9 from 2015 same as NetBeans.
instructions : https://www.vultr.com/docs/how-to-install-apache-maven-on-ubuntu-16-04
On 04/01/2020 16:13, Peter L. Berghold wrote:
what is Maven on about here? WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.google.inject.internal.cglib.core.$ReflectUtils$1 (file:/usr/share/maven/lib/guice.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java. security.ProtectionDomain) WARNING: Please consider reporting this to the maintainers of com.google.inject.internal.cglib.core.$ReflectUtils$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release
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