java 字符转 转换成数组

Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
//        String trim = next.trim();
//        str = str.trim();
        str = str.substring(1, str.length() - 1);
        String[] arr = str.split(",");
//        for (int i = 0; i < arr.length; i++) {
//            System.out.println(arr[i]);
//        }
        int[] arr1 = new int[arr.length];
        for (int i = 0; i < arr.length; i++) {
            String n = arr[i].trim();
//            System.out.println(arr[i]);
//            arr1[i]  =arr[i];
            arr1[i] = Integer.parseInt(n);
        }
        for (int i = 0; i < arr1.length; i++) {
            System.out.println(arr1[i]);
        }