Lambda expressions sort list objects in multiple fields

1、 Code up

// Carry out positive joint sorting according to the year and number 
// Year ascending 
Comparator<ReplyInfoVo> year = Comparator.comparing(ReplyInfoVo::getCaseNo3);

// Number ascending 
Comparator<ReplyInfoVo> num = Comparator.comparing(ReplyInfoVo::getCaseNo4);

//  Joint sort 
Comparator<ReplyInfoVo> finalComparator = year.thenComparing(num);

replyInfoVoArrayList = replyInfoVoArrayList.stream().sorted(finalComparator).collect(Collectors.toList());

You can arrange the fields in positive order by year first , Then arrange them in positive order , Try it yourself .

2、 Explain in detail

java Code using lambda Sort by