.join()

The .join() method returns a new string composed of the elements joined together with the specified delimiter.

String.join(delimiter, element1, element2...elementN);

• delimiter (required): The delimiter that is used to join the elements.
• elements(required): The elements to be joined together.

The example below uses .join() to concatenate several names with a pipe delimiter:

// JoinPipe.java
class JoinPipe {
  public static void main(String[] args) {
    String names = String.join(" | ", "Carl", "Jonas", "Emily", "Daniel", "Nina");
    System.out.println(names);
  }
}

The output would be:

Carl | Jonas | Emily | Daniel | Nina