Today, most of the companies rely on this private API to get their Java development job to be done. According to experts, Java 9 would be completely focused on modularization concept so they have decided to eliminate access to private APIs. API can cause big data interruption and it will bring instability to JVM. So Private API is not to be used by novice players but it should be utilized by expert developers only.
The team is working together to standardize safe parts and retiring unsafe part of APIs. The statement clearly proves that some of the APIs are still available to access by default but most of them that were considered unsafe have been eliminated by default.
According to Oracle’s expert team, they have been taken this decision after careful observation only. However, Oracle has denied commenting further on preventing access to private APIs ad how it would for upcoming versions.