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JDK 18 has been released as a GA short‑term support version with six months of maintenance, introducing nine major JEPs—including UTF‑8 as the default charset, a simple HTTP server, a Vector API incubator, and a Foreign Function & Memory API—while preparing for JDK 19 in September and the next LTS, JDK 21, in 2023.
JDK 18, released on March 22, 2022, introduces nine new JEPs—including default UTF‑8 charset, a simple web server, @snippet for Javadoc, method‑handle based reflection, Vector API, internet address resolution SPI, foreign function & memory API, switch pattern matching, and deprecation of finalization—while being a short‑term feature release.
JDK 18, released on March 22 2022, introduces nine new JEPs—including default UTF‑8 charset, a simple web server, code snippet support in JavaDoc, vector API, external function and memory API, and switch pattern matching—while being a short‑term feature release following the LTS JDK 17.