for循环迭代-如何避免逗号

Question

我想将字符串与“，”一起从2到6。当我执行下面的代码时，我得到了输出，但是它以逗号开头。    String name="";    String s = "1,two,three,four,five,six,seven"; //this is a sample string, original string might contain more words separated by ","    String[] split = s.split(",");    System.out.println("Splitted Length: " +split.length);    if(split.length>2) {        for(int i=1; i<split.length-1;i++) {            name = name+","+split[i];        }    }    System.out.println(name);输出：  Splitted Length: 7 ,two,three,four,five,six如何避免第一个逗号

Answer 1

请停止使用那些for循环。不要发明新事物。知道API。

List<String> valuesList = Arrays.asList(array).subList(x, y);
String newValuesString = String.join(",", valuesList);

Answer 2

您可以使用Java8Stream和Pattern为。

String result = Pattern.compile(",").splitAsStream(s)

    .skip(1)

    .collect(Collectors.joining(","));