我有以下方法:
//Cleans any stop words at the beginning of the sentence, returns the remaining
//sentence.
public static String cleanBeginning(String sentence, boolean skipEmpty)
{
List<String> words = Common.getWords(sentence, skipEmpty);
int i = 0;
Iterator<String> iterator = words.iterator();
while (iterator.hasNext() )
{
String word = iterator.next();
if ( stopWords.contains( word.toLowerCase() ) )
{
words.remove(i);
continue;
}
break;
}
StringBuilder sb = new StringBuilder();
for (String cleanedWord : words)
{
sb.append(cleanedWord ).append(" ");
}
return sb.toString().trim();
}
在线:
String word = iterator.next();
我得到java.util.ConcurrentModificationException
。这是为什么?我认为iterator.next()
应该是一种安全的方式来绕过一个arraylist?我做错了吗?
答案 0 :(得分:4)
您需要使用迭代器从集合中删除,而您没有这样做。
变化:
words.remove(i);
为:
iterator.remove();