字符串数组转换为字符串并以符号拼接

哭哭啼

已于 2023-09-15 09:45:43 修改

阅读量304

点赞数

分类专栏： Java 文章标签： java

于 2023-09-05 16:20:57 首次发布

本文链接：https://blog.youkuaiyun.com/jg_csdn/article/details/132694851

版权

Java 专栏收录该内容

15 篇文章

订阅专栏

本文介绍了Java中几种字符串连接的方法，包括StringJoiner用于可变分隔符，String.join处理List，StreamAPI的collect方法，以及使用StringBuffer逐个添加元素。展示了如何在循环中构建字符串

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

StringJoiner

  public static void main(String[] args) {
      StringJoiner joiner =new StringJoiner(",","[","]");
      joiner.add("str1");
      joiner.add("str2");
      joiner.add("str3");
      System.out.println(joiner);
    }

String.join方式

List<String> list = new ArrayList<>(Arrays.asList("1","2","3","4","5"));
String result = String.join(",",list);
System.out.println(result);

Stream流

List<String> list = new ArrayList<>(Arrays.asList("1","2","3","4","5"));        
String result2 = list.stream().collect(Collectors.joining(","));
System.out.println(result2);

StringBuffer

StringBuffer sb = new StringBuffer();
for(String str : list){
   sb.append(str).append(",");
}
String result3 = sb.toString().substring(0,sb.length()-1);
System.out.println(result3);

for遍历

List<String> list = new ArrayList<>(Arrays.asList("1","2","3","4","5"));
String result4 = "";
for(int i = 0;i < list.size();i++){
     if(i == list.size() - 1){
           result4 += list.get(i);
      }else{
            result4 += list.get(i) + ",";
           }
      }
System.out.println(result4);