How to change the language of jDeveloper UI

Q: 1.How can you start your jDeveloper in a different language other than the OS language setting?If you want to change the display of your jdeveloper to a different language (i.e Japanese, French, English).

A: You can try the following:
Modified the jdev.conf file in jdev/bin folder to add the following JVM parameter.
In japanese case
AddVMOption -Duser.language=ja
AddVMOption -Duser.country=JP

In french case
AddVMOption -Duser.language=fr
AddVMOption -Duser.country=FR

In english case
AddVMOption -Duser.language=en
AddVMOption -Duser.country=US

For example, In japanese case,













Then,when you start the jDeveloper again, you can get japanese language UI like following.