Global variables in Java [duplicate]

This question already has answers here: 开发者_开发百科 Closed 11 years ago.

Possible Duplicates:

Why are there no global variables in Java?

Global variables in Java

Hi,

Is there any way to declare global Variables in java? or something with a wide scope like them? can anybody explain me why are global variables considered bad? any articles about this are really appreciated.

thank you

---

On any class, you can declare static variables:

class MyClass {

    public static String MyString = "Some String";

    ...
}

And then reference them via:

MyClass.MyString;

---

You can create 'global' variables by declaring them within the scope of the class ie

public class Example {
    String globalString = "this is global";
    public static void main(String[] args){
       String localString = "this is a local variable";
    }
}

You can also create static variables which can be accessed by a method which has been declared static too.

---

A good discussion can be found here, Static Methods or Not? Global variables?

---

public static will give enough scope to your variable for them to act as global variable. But think twice before doing so.