The Java virtual machine (JVM) is a program whose sole purpose is to execute other programs. This simple idea has made Java one of the most successful and long-lived platforms of all time.

James Ward is a Java Champion and Google’s Kotlin product manager. In this interview, he speaks about the state of Java, JVM languages, mutability, and functional programming.

In this Java performance tuning guide, learn how to put together an application performance manifesto and how to investigate shared resources that might cause a Java performance problem.