JAVA 取自增序号（可用于实体类排序） 

 1 //import java.util.concurrent.atomic.AtomicInteger; //引入
 2 
 3 
 4 //将List按照某一字段升序排序
 5 List<SrmSfdBidItemLadderVO> itemRank=itemRank.stream().sorted(Comparator.comparing(SrmSfdBidItemLadderVO::getLadderNoTaxPrice)).collect(Collectors.toList());
 6 
 7 //设置自增值
 8 AtomicInteger index = new AtomicInteger(0);
 9 
10 //设置序号
11 itemRank.stream().forEach(ro->{  
12 ro.setLadderBidRank(index.incrementAndGet());
13                             });

 //输出展示

AtomicInteger index = new AtomicInteger(0);
System.out.println(index.incrementAndGet());
System.out.println(index.incrementAndGet());
System.out.println(index.incrementAndGet());
System.out.println(index.incrementAndGet());

 

posted @ 2021-02-01 10:49  哎丫丫呀喂  阅读(3520)  评论(0)  编辑  收藏  举报