Link toInsert = new Link(data); lastLink = toInsert; Link traversal= new Link(firstLink); traversal = traversal.next; System.out.println("LastLink = " + <
在org.apache.tinkerpop.gremlin.process.traversal.Traversal$Exceptions.traversalIsLocked(Traversal.java:245) at org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal.addStep(DefaultTraversal.java:274) at org.apache.tinkerpop.gremlin.process.traver