如何使用stream api和嵌套的foreach循环来计算总和,其中每个循环都有一个过滤条件? //java7
Double sum = null;
for (FirstNode first : response.getFirstNodes()) {
if (first.isValid()) {
for (SndNnode snd : first.getSndNodes
在一个文件中缺少内容我有这样的结构: 192.168.1.53 # hostname, city, state
192.168.1.101 # hostname, city, state
192.168.1.10 # hostname, city, state
192.168.1.18 # hostname, city, state
192.168.1.19
192.168.1.104