java.util.ConcurrentModificationException 异常说明

今天碰到一个奇怪的问题。

List<Channels> lstChannels = cmsManager.getNewsDao().findAllActiveChannels2();
        for (Channels c : lstChannels) {
            if (c.getChannelUrl().equals("meeting")) {
                lstChannels.remove(c);
            }
        }

抛出如题异常

解决办法1

List<Channels> lstChannels = cmsManager.getNewsDao().findAllActiveChannels2();
        for (int i = 0; i < lstChannels.size(); i++) {
            Channels c = lstChannels.get(i);
            if (c.getChannelUrl().equals("meeting")) {
                lstChannels.remove(c);
                i--;
            }
        }

解决办法2

List<Channels> lstChannels = cmsManager.getNewsDao().findAllActiveChannels2();
        Iterator<Channels> ite = lstChannels.iterator();
        while(ite.hasNext()) {
            if(ite.next().getChannelUrl().equals("meeting")) {
                ite.remove();
            }
        }

解决办法3

List<Channels> lstChannels = cmsManager.getNewsDao().findAllActiveChannels2();
        List<Channels> tempChannels = new ArrayList<Channels>();
        for (int i = 0; i < lstChannels.size(); i++) {
            Channels c = lstChannels.get(i);
            if (c.getChannelUrl().equals("meeting")) {
                tempChannels.add(c);
            }
        }
        lstChannels.removeAll(tempChannels);