This post explains how to use variables in Java. Learn the primitive types (and what that means) ... For the most part, you are safe to use String just the same as any other variable.

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.

Call the Java String length() method; Hold the value of the String length in a variable for future use; Java String length method() The Java String class contains a length() method that returns the ...

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

The program declares a variable named result, and assigns it to the value returned by the Java ternary operator. The ternary operator evaluates to see if a randomly generated number is less than zero.