Java8 :: String Join

1.java

private static final String COMMA_DELIMITER = ",";

//แบบที่ 1
String[] names = {"I", "love", "You"};
System.out.println( String.join(COMMA_DELIMITER, names) );

//แบบที่ 2        
System.out.println(String.join(COMMA_DELIMITER, "I", "love", "You"));

2.java

List<String> inputs = new ArrayList<String>();
inputs.add("I");
inputs.add("love");
inputs.add("You");
        
System.out.println(String.join(COMMA_DELIMITER, inputs));

3.java

StringJoiner joiner = new StringJoiner(":", "[", "]");
joiner.add("192");
joiner.add("168");
joiner.add("1");
joiner.add("234");
System.out.println(joiner.toString());

4.java

List<String> inputs = new ArrayList<String>();
inputs.add("I");
inputs.add("love");
inputs.add("You");

String output = inputs.stream().map( messgae -> messgae.toString()).collect(Collectors.joining(COMMA_DELIMITER));
System.out.println( output );

5.java

List<String> datas = Arrays.asList("192", "168", "1", "234"); 
String output = datas.stream().map( messgae -> messgae.toString()).collect(Collectors.joining(":", "[", "]"));
System.out.println( output );