How is the replacement of the deprecated Metaspace implemented in the latest JVM versions?

In the latest versions of JVM (starting from Java 8 and onwards), Metaspace replaced PermGen and is an off-heap memory area used for storing class metadata.

However, Metaspace is not deprecated; on the contrary, it has replaced PermGen. If the question concerns changes after Metaspace, then in newer JVM versions (e.g., Java 14+), dynamic tuning of Metaspace has been improved, and mechanisms for more efficient management of metadata memory have been introduced, including:

• Automatic expansion and compression of Metaspace as needed.
• Improved garbage collection for classes and metadata.

Thus, Metaspace is not replaced but evolves with improvements in memory management. If referring to the replacement of PermGen, that is what Metaspace is.