java.util.NoSuchElementException解决办法

最近在做一个项目，项目运行时,总是提示:java.util.NoSuchElementException.错误没有具体到code的行号,所以不容易debug.
今天总算找到了root cause,so share it:

报错信息：

[java] Exception in thread "main" java.util.NoSuchElementException
     [java]         at java.util.AbstractList$Itr.next(AbstractList.java:350)
     [java]         at sprint.reporter.SprintReporter.process(Unknown Source)
     [java]         at sprint.main.SprintMain.main(Unknown Source)
     [java] Java Result: 1

报错位置：
猜测是某个interator出现了越界.
        while(iter.hasNext()) {
             
ArrayList<SprintUserStory> undoneUserStoriesList =
SprintUtil.getUndoneUserStoriesList(iter.next().getID(),iter.next().getPkey());
//Root cause
              if(undoneUserStoriesList.size() >0){
                  willdonefeautre--;
               }

改正：

Root cause其实就是多用了一次iter.next()，所以报了迭代器错误。

while (iter.hasNext()) {
               JIRAFeature jirafeaturetemp = iter.next();
              
ArrayList<SprintUserStory> undoneUserStoriesList =
SprintUtil.getUndoneUserStoriesList(jirafeaturetemp.getID(),jirafeaturetemp.getPkey());
                if(undoneUserStoriesList.size() >0){
                   willdonefeautre--;
                }