Creating global variables - Java

Question

I am getting a compiling error for this code:

public class Matching {        
    public static int match = (int) Math.floor(Math.random()*cities.size()); //Error is here
}

I'm want to make "match" a global variable.

My compiling error is:

"Illegal static declaration in inner class testingProgram.Matching modifier 'static' is only allowed in constant variable declarations

Usage of static non-final variable during initialization."

Don't know what the error means, nor do I know how to fix it.

Answer 1

This happens because your Matching class is located inside another class called testingProgram, and is not static.

Java allows static fields inside an inner class only when the inner class itself is static. You can fix this problem in several ways:

• By making Matching a static inner class,
• By making Matching a top-level class, or
• By making static int match final, i.e. final static int match