As the output shows, the recommended “indent” approach prevents inlining of the constant variables and allows the updated Constants.java constants to be fully reflected in the executed code.

There are other ways you can categorize variables in Java, and other ways you can manipulate data. For instance, a constant is a variable whose value never changes.

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.