How can I identify an anonymous inner class in a NotSerializableException

Board$1 is the first anonymous class encountered in Board.java. For example:

class Board {
  public static void main(String[] args) {
    new Object() {}; // Board$1
    new Object() {}; // Board$2
  }
}

With an IDE like Eclipse, it’s easy to spot those anonymous classes in the outline view. I’m sure NetBeans has similar views:

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