Global variables in Java

Question

How do you define Global variables in Java ?

Answer 1

To define Global Variable you can make use of static Keyword

public final class Tools {
  public static int a;
  public static int b;
}

now you can access a and b from anywhere by calling

Tools.a;
Tools.b;

Yoy are right...specially in J2ME... You can avoid NullPointerException by putting inside your MidLet constructor (proggy initialization) this line of code:

new Tools();

This ensures that Tools will be allocated before any instruction that uses it.

That's it!