相关疑难解决方法(0)

我正在HashMap调用testMap哪个包含String, String.

HashMap<String, String> testMap = new HashMap<String, String>();

迭代地图时,if value与指定的字符串匹配,我需要从地图中删除该键.

即

for(Map.Entry<String, String> entry : testMap.entrySet()) {
  if(entry.getValue().equalsIgnoreCase("Sample")) {
    testMap.remove(entry.getKey());
  }
}

testMap包含"Sample"但我无法从中删除密钥HashMap.
而是得到错误:

"Exception in thread "main" java.util.ConcurrentModificationException
    at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
    at java.util.HashMap$EntryIterator.next(Unknown Source)
    at java.util.HashMap$EntryIterator.next(Unknown Source)"