本來以為在明年3月可以嘗鮮的Java 9卻要延遲了，據外媒報道，甲骨文宣布原定于2017年3月推出的Java 9將再延至2017年7月發布，主要原因是Java 9內置的模組化架構Jigsaw需要更長的時間來開發。
Despite this progress, at this point it’s clear that Jigsaw needs more time. We recently received critical feedback that motivated a redesign of the module system’s package-export feature , without which we’d have failed to achieve one of our main goals. There are, beyond that, still many open design issues , which will take time to work through. Looking at the release as a whole, the number of open bugs that are new in JDK 9 is quite a bit larger than it was at this point in JDK 8. The maintainers of many popular projects are now actively testing against the JDK 9 EA builds , but we’d like to see even more in order to be confident that potential issues have been found and reported. For these reasons I hereby propose a four-month extension of the JDK 9 schedule, moving the General Availability (GA) milestone to July 2017.
Mark Reinhold稱，由于收到使用者反饋，需要重新設計模組化架構Jigsaw中的Package-Export功能，更重要的是Java 9中還存在大量安全漏洞和Bug需要修復。