問(wèn)題描述

描述：取出 cp中非 DataTime，下面代碼是否合理，是否存在對(duì)deviceDataMap 并發(fā)問(wèn)題？

Map<String,Map<String,String>> deviceDataMap = new HashMap<>(); String cp = 'DataTime=20040506010101;SB1-RT=1.1;SB2-RT=2.1';

List<String> cpValusList = Arrays.asList(cp.split(';'));

cpValusList.stream().filter(item -> !item.contains('DataTime=')).forEach(item ->{String deviceId = item.substring(0,item.indexOf('-'));if(!deviceDataMap.containsKey(deviceId)){ Map<String,String> oneDeviceIdValusMap = new HashMap<>(); List<String> deviceIdValueList = Arrays.asList(item.split(',')); deviceIdValueList.forEach(value->{String[] temp = value.split('=');oneDeviceIdValusMap.put(temp[0], temp[1]); });deviceDataMap.put(deviceId, oneDeviceIdValusMap);} });

問(wèn)題解答

并行流就是一個(gè)把內(nèi)容分成多個(gè)數(shù)據(jù)塊，并用不不同的線程分別處理每個(gè)數(shù)據(jù)塊的流

上面代碼應(yīng)該不存在并發(fā)問(wèn)題，看樣還是對(duì)java8 stream的原理沒(méi)搞明白啊》》》》http://blog.csdn.net/sunjin94...