static class WorkerNode { Worker worker; WorkerNode next; },该如何解决

static class WorkerNode { Worker worker; WorkerNode next; }
static class WorkerNode {
Worker worker;
WorkerNode next;
}
如题，这介是什么类，静态类？还有这种类的吗？

[解决办法]
JAVA 内部静态类--解析静态内部类的使用目的与限制
http://blog.csdn.net/vange/article/details/5407625