[JAVA] List와 String (문자열, 배열) 변환

List -> String

List<String> test = new ArrayList<>();

String testString = String.join(",", test);

 

String -> List

String s = "test";

String[] tests = s.split("")

List<String< list = new ArrayList<String>(Arrays.asList(tests);

 

String[] -> List

String[] test = new String[] {"a", "b", "c"}

List<String> list = new ArrayList<>();

list = Arrays.stream(test).collect(Collectors.toList());

혹은 list = new Arraylist<>(Arrays.asList(tests));

 

List -> STring[]

String[] tests = list.toArray(new String[list.size]);