The most common adjustment is performance-tuning the JVM’s memory settings. Before Java, all program memory was managed by the programmer. In Java, program memory is managed by the JVM.

The easiest way to optimize your Java runtime is to supply correct JVM options and parameters. In honor of the Java 21 release, we examine the 21 most important Java JVM options you can configure.

Java 22 arrives with previews of scoped values, structured concurrency, stream gatherers, and the ability to execute multi-file programs.