One interesting technical nuance discovered by the community around this release involved native code handling. Some organizations running highly specialized native libraries (JNI) noticed behavioral changes in how the JVM handled stack frames during certain error conditions.
Since Java 9, Oracle no longer distributes a separate JRE for desktop users. Instead: java runtime 18 u241 work
| Feature | Java 8u241 | Java 18 | Workaround | |---------|-----------|---------|-------------| | com.sun.image.codec.jpeg | Yes | No (removed) | Use ImageIO | | Internal APIs (JDK internals) | Yes (with warnings) | No (encapsulated) | Add --add-exports | | finalize() methods | Yes | Deprecated | Use Cleaner or try-with-resources | | javax.xml.bind (JAXB) | Yes (built-in) | No | Add Jakarta EE or JAXB separately | One interesting technical nuance discovered by the community