Searching for: Global Variables in Java
A constant is a variable which cannot have its value changed after declaration. It uses the 'final' keyword.
Class methods are methods that are called on the class itself, not on a specific object instance. The static modifier ensures implementation is the same across all class instances. Many standard built-in classes in Java (for example, Math) come with static methods (for example, Math.abs(int value)) that are used in many Java programs.
A method is a block of code that can be called from another location in the program or class. It is used to reduce the repetition of multiple lines of code. The return statement concludes the execution of the block of code, returning something of type provided in the method header, or null (void method).