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Java8-如何将List转变为逗号分隔的字符串

时间:2020-01-26 21:00:13      阅读:236      评论:0      收藏:0      [点我收藏+]
List<String> cities = Arrays.asList("Milan", 
                                    "London", 
                                    "New York", 
                                    "San Francisco");
String citiesCommaSeparated = String.join(",", cities);
System.out.println(citiesCommaSeparated);
//Output: Milan,London,New York,San Francisco

使用流的方式:

String citiesCommaSeparated = cities.stream()
                                    .collect(Collectors.joining(","));
System.out.println(citiesCommaSeparated);

使用流的方式,在连接之前操作字符串

String citiesCommaSeparated = cities.stream()
                                    .map(String::toUpperCase)
                                    .collect(Collectors.joining(","));
//Output: MILAN,LONDON,NEW YORK,SAN FRANCISCO

 

Java8-如何将List转变为逗号分隔的字符串

原文:https://www.cnblogs.com/qingmuchuanqi48/p/12234787.html

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