The correct way to convert a String to long in Java is with the parseLong method of the wrapper class. The constructor conversion approach is deprecated! Use parseLong instead.

The Java String class contains a length () method that returns the total number of characters a given String contains. This value includes all blanks, spaces, and other special characters.

Get a deep dive into using method references in your Java programs, including stream operations, event listeners, and constructors and factories.

Method and variable handles vs. Java reflection To truly understand MethodHandles and VarHandles —what they do and why they are useful—it’s helpful to know a few things about reflection in Java.