Why are there no global variables in Java? [closed]

Question

Why are there no global variables in Java?

Answer 1

The answer is to your question is, because Java doesn't support global variables, by design. Java was designed with object-oriented principles in mind and as such, every variable in Java is either local or a member of a class.

Static class members are globally-accessible, which is certainly one possible definition of a global variable, depending upon your interpretation of the term. To be pedantic, whilst Static class members are accessible via the class name and therefore across multiple scopes, they are still class members; and therefore not truly global variables as such.

Java's lack of support for global variables is a good thing, as using global variables is a design anti-pattern.

Answer 2

Global variables are usually a design flaw.

Your components should be self-contained and should not need any global state.
Instead, use private static fields.