There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "The first call invokes onSubscribe(), which stores Subscription locally and then notifies Publisher about their readiness to receive newsletters via the request() method."

A block of code is set as follows:

@Override
public long maxElementsFromPublisher() {
    return 1;
}

Any command-line input or output is written as follows:

./gradlew clean build

Bold: Indicates a new term, an important word, or words that you see onscreen.