架构师训练营 - 第八周 - 作业

 public Node mergeList(Node head1, Node head2) {
        if (head1 == null || head2 == null) {
            System.out.println("没有公共节点");
            return null;
        }
        Node longNode;
        Node shortNode;
        int gapCount = 0;
        int head1Length = getLength(head1);
        int head2Length = getLength(head2);

        if (head1Length > head2Length) {
            longNode = head1;
            shortNode = head2;
            gapCount = head1Length - head2Length;
        } else {
            longNode = head2;
            shortNode = head1;
            gapCount = head2Length - head1Length;
        }

        for (int i = 0; i <gapCount; i++) {
            longNode = longNode.next;
        }
            while (longNode != null && shortNode != null && longNode != shortNode) {
                System.out.println("long---"+longNode.data);
                System.out.println("short----"+shortNode.data);
                longNode = longNode.next;
                shortNode = shortNode.next;
                if(longNode.data==shortNode.data){
                    head=longNode;
                    System.out.println("第一个公共节点是"+head.data);
                    return head;
                }
            }
        return longNode;
    }