Conventions used

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

Code in text: 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: “Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system.”

A block of code is set as follows:

public interface Payment { void processPayment(double amount); }

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

public Book implements ValidateIsbn, Publication{
    void displayInfo(){ ... } 
    void validateIsbn(String isbn){ ... } 
}
Voicemail(s0)

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

keytool -genkeypair -alias myappkey -keyalg RSA -keysize 2048 -keystore mykeystore.jks -validity 365

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Select System info from the Administration panel.”

Tips or important notes

Appear like this.