JAVA

java join list

List<String> list = Arrays.asList("foo", "bar", "baz");
String joined = String.join(" and ", list); // "foo and bar and baz"

java join list of strings

String result = String.join(",", list);

java join list as string

List<String> list = Arrays.asList("a","b","c");
String result = String.join(",", list);

System.out.println(result);		//prints a,b,c

java join list

String[] data = { "First", "Second", "Third" };
StringBuilder sb = new StringBuilder();
for (String item : data) {
  sb.append(item).append(", ");
}
sb.setLength(sb.length() - 2);

// generates output:
// First, Second, Third