Accesing static variable from another class in java

Question

I had a queue implemented as linked list in my multithreaded server. I want to access this queue from another class. Both classes are in the same package. I tried making thi

Answer 1

You should be able to access if directly, or using static getter methods...

If this is your Queue class...

public class Queue {
    public static LinkedList myList = new LinkedList();

    public static ListedList getMyList(){
        return myList;
    }
}

Then you could access your list be either calling Queue.myList or Queue.getMyList() - both will do the same thing. The benefit of using a getter method would be that you can control access to the list, such as by making the method synchronized, preventing calls to the list being out of order.

Answer 2

You can access a public static member of another class directly, using the notation ClassName.memberName:

public class Foo {
    public static String bar = "hi there";
}

public class Thing {
    public static void main(String[] args) {
        System.out.println(Foo.bar); // "hi there"
   }
}

public static data members are usually not a great idea (unless they've final), but if you need one, that's how you do it.