How does Java Garbage Collection work with Circular References?

From my understanding, garbage collection in Java cleans up some objects if nothing else is ‘pointing’ to that object.

My question is, what happens if we have something like this:

class Node {
    public object value;
    public Node next;
    public Node(object o, Node n) { value = 0; next = n;}

//...some code
    Node a = new Node("a", null), 
         b = new Node("b", a), 
         c = new Node("c", b); = c;
} //end of scope
//...other code

a, b, and c should be garbage collected, but they are all being referenced by other objects.

How does the Java garbage collection deal with this? (or is it simply a memory drain?)

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