Java join list of string

/**
 * @author lautturi.com 
 * Java example: java concat/concatenate strings in list 
 */

import java.util.*;

public class Lautturi {
	public static void main(String[] args) {

		List<String> list = Arrays.asList("hello","lautturi","java","python");
		String str = String.join(",", list);

		System.out.println(str);
		
	}
}

output:

hello,lautturi,java,python