Because the compiler doesn’t check that runtime exceptions are handled or documented to be handled elsewhere, you can think of a runtime exception as an unchecked exception.

Runtime exceptions, or unchecked exceptions Compiler-enforced (checked) exceptions are instances of the Exception class or one of its subclasses — excluding the RuntimeException branch.

Azul Systems (Azul), the award-winning leader in Java runtime solutions, today announced the immediate availability of Zing 17.03, including its new "Falcon" Just-in-Time (JIT) compiler.