Java – Convert List to comma-separated String
This tutorial shows several ways for converting a List to a comma-separated String in Java. 1- Java 7 The traditional way of converting a List to a comma-separated String in Java 7 and older versions is through using StringBuilder as the following:
1 2 3 4 5 6 7 8 9 | public static String convertUsingStringBuilder(List<String> names) { StringBuilder namesStr = new StringBuilder(); for(String name : names) { namesStr = namesStr.length() > 0 ? namesStr.append(",").append(name) : namesStr.append(name); } return namesStr.toString(); } |
2- Java 8 In Java 8, there are 2 conversion ways. 2.1. String.join() The most common way is...