我知道如果尝试使用简单的循环从集合中删除元素,就会抛出 java.util.ConcurrentModificationException
异常。但我正在使用迭代器,仍然会生成此异常。有任何想法为什么会这样,以及如何解决?
HashSet<TableRecord> tableRecords = new HashSet<>();
...
for (Iterator<TableRecord> iterator = tableRecords.iterator(); iterator.hasNext(); ) {
TableRecord record = iterator.next();
if (record.getDependency() == null) {
for (Iterator<TableRecord> dependencyIt = tableRecords.iterator(); dependencyIt.hasNext(); ) {
TableRecord dependency = dependencyIt.next(); //Here is the line which throws this exception
if (dependency.getDependency() != null && dependency.getDependency().getId().equals(record.getId())) {
tableRecords.remove(record);
}
}
}
}