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jPOS upgraded to Java 26

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Java 26 reached General Availability on March 17, 2026. jPOS, jPOS-EE, and the tutorial projects have been updated to run on it, alongside Gradle 9.4.1.

Notable in this release:

  • HTTP/3 support in the standard HttpClient API (JEP 517)
  • Ahead-of-Time Object Caching with any GC (JEP 516), improving startup latency
  • G1 GC throughput improvements via reduced synchronization (JEP 522)
  • PEM encoding of cryptographic objects (JEP 524, second preview)
  • Structured Concurrency continues to mature (JEP 525, sixth preview)
  • Applet API removed (JEP 504)

No source changes were required in jPOS or jPOS-EE. The tutorial projects needed a minor import path correction: ISOUtil had moved from org.jpos.util to org.jpos.iso in an earlier jPOS release and the tutorials hadn't caught up yet.