Essentially, an “if statement” is what you use for “flow control.” If statements allow for branching code that lets programs react dynamically to inputs.

A method might accept a specific type and its subclasses, but you want to restrict usage to a select few implementations of your own design. Java's open inheritance model can feel like an open ...

Java Mission Control also provides embedded access to the Java Diagnostic Command tool jcmd. Developers can use it to execute a variety of VM operations against a running JVM, such as the following ...