Plain Old Java Switch Expression, but with a twist. This twist or update has been added to the core library of Java since Java 13. And If you are using Java version 13 or after, you can surely convert that old switch with the new one.
On 22 March 2022, The JDK 18 or Java 18 is released to the public (from Oracle). Java 18 does have something very interesting
An interview cant be complete without this question. HashMap working contains most of the concept we used in our codes. It need hashcode and equals.