Example:
Professional Java developers who've come as far as they can without exploiting threads will find their skills bumped up a few notches by the time they finish Paul Hyde's Java Thread Programming. In a five-and-a-half-page first chapter, the book gives a basic concept briefing, then gets down to business with an example-rich education from the starting thread through inter-thread communication, thread groups, thread pooling, threads and Swing, and more. You'll get an experienced voice on how to gracefully exit from a thread — and find out when to use the lead-between-the-eyes SureStop class instead. You'll even find out when multiple threads aren't a good idea. If you're serious about learning what it takes to do Java really, really well, this book is a good place to invest your time.
A simple Google search reveals nothing. What do you think the author is trying to say?
Best Answer
The meaning is "deadly" or "lethal" (adjective). Deadly to the thread that you want to quickly and surely halt.
The SureStop class apparently can be used to forcefully and rapidly shut down a thread - like putting a bullet (= lead) between someone's eyes.
Bullets are made of lead. The word "bullet" has been substituted with "lead" to make the sentence more expressive.
We can also say that this method is "deadly efficient", like last-resort methods often are. A method with a great "stopping power".
Hereunder goes a wholesale crib of a great comment by talrnu: