As shown below:
double[] features3 = {1,2,3};//If it is a basic type, you must first convert it to an object. <span style="font-family:Arial;font-size:14px;">commons-lang3 package is available</span> Double[] features4 = ArrayUtils.toObject(features3); public String listToString(List list, char separator) { return org.apache.commons.lang.StringUtils.join(list.toArray(),separator); }The above example of Java using delimiters to connect each element in an array is all the content I share with you. I hope you can give you a reference and I hope you can support Wulin.com more.