基于位运算的求解NQueen问题的一个实例。 提供了基于单线程和多线程两种方式计算的代码，分别见NQueen.java和MultiThreadNQueen.java-Bitwise-based problem solving NQueen a case in point. Provided based on the single-threaded and multi-threaded code calculated in two ways, respectively, see NQueen.