Java创建双向循环链表报java.lang.OutOfMemoryError: Java heap space，是什么问题？

Question

public class DoublyLinkedNode {
private char data;
private DoublyLinkedNode prior;
private DoublyLinkedNode next;

public DoublyLinkedNode() {
}

public DoublyLinkedNode(char data, DoublyLinkedNode prior, DoublyLinkedNode next) {
    this.data = data;
    this.prior = prior;
    this.next = next;
}
}

 /**
 * 线性表的链式存储结构-双向循环链表
 */
public class DoublyCircularLinkedList implements LinearLinkedList {

    private DoublyLinkedNode head;

    public DoublyCircularLinkedList() {
        head = new DoublyLinkedNode();
        head.setPrior(head);
        head.setNext(head);
    }

            /**
     * 尾插法建表
     *
     * @param data
     */
    @Override
    public void createListTail(char data) {
        DoublyLinkedNode temp = new DoublyLinkedNode(data, head.getPrior(), head);
        head.getPrior().setNext(temp);
        head.setPrior(temp);
    }
}

Answer 1

head.getPrior()代码在哪里？其中是不是有递归调用自身的代码造成内存溢出