Java naming conventions for variables, methods and reference types are where things get a little more complicated. For example, you can start a Java variable with a dollar sign or an underscore -- but ...

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.

Java stores object values in heap memory; references to the value are stored in the stack. Another way to create strings is to use the new keyword, as in the following example. String s1 = new String( ...