How do I add jvm arguments and configure properties with IcedTea

[saurabhqhr]

I want to add few jvm arguments to support java 11 . These arguments are mostly related to access module & package. For example --add-opens=java.base/sun.misc=ALL-UNNAMED . I also want to set the default locale java.locale.providers to COMPAT,SPI I have set this in the jnlp file but when I launch application using IcedTea , these configuration are not applied.

 <property name="java.locale.providers" value="COMPAT,SPI"/>
  <j2se version="11"  java-vm-args="--add-opens=java.base/sun.misc=ALL-UNNAMED"  />

I found another way to apply above configuration by adding it to the itw-modularjdk.args file located inside C:\Program Files\IcedTeaWeb\WebStart\bin. But updating itw-modularjdk.args file is not ideal solution for us, since all our clients needs to manually update their icedTea configuration. Is there any way to solve the above problem programmatically ?