------------------------ StringJoiner | ------------------------ # JDK9µÄÐÂÀà¿â # ¼¸ÐдúÂë¿´Ã÷°× StringJoiner stringJoiner = new StringJoiner(",","[","]"); for(int x = 0 ;x < 10 ; x++) { stringJoiner.add(x + ""); } System.out.println(stringJoiner.toString()); // [0,1,2,3,4,5,6,7,8,9]