Gartner Research

Assessing the Architecture Impact of the Java 9 Module System

Published: 19 January 2018

ID: G00343222

Analyst(s): Kirk Knoernschild


JPMS, Java 9's major new feature, is a disruption for the Java ecosystem. It impacts existing applications, development, popular frameworks, the JDK and the JVM. Technical professionals responsible for software architecture must assess JPMS's impact on existing applications and the Java ecosystem.

Table Of Contents


  • Other Key Features of Java 9
  • Fixing Platform Limitations With JPMS
    • Enabling Greater Agility Requires Modularity
    • JPMS by Example
    • Building Extensible and Scalable Software With Advanced JPMS Capabilities
  • Missing JPMS Features
    • Managing Different Versions of the Same Module
    • Dynamic Updates Without Restarting the JVM
  • Changes Impacting Developers
  • Migrating Custom Applications to JPMS
    • Bottom-Up Migration Using Unnamed Modules
    • Top-Down Migration Using Automatic Modules
  • Modularize Existing Applications Today
  • Compile Your Application Using Java 9
  • Use Utilities to Understand Module Dependencies
  • Use Basic JMPS Features First
  • Wait for an LTS Release Offering Java 9 Features Before Adopting


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