八皇后问题位运算算法代码java

以下是八皇后问题的位运算算法的Java代码实现：

public class EightQueens {
    private int count = 0;
    private int upperlim = 1;
    private void backtrack(int row, int ld, int rd) {
        if (row != upperlim) {
            int pos = upperlim & ~(row | ld | rd);
            while (pos != 0) {
                int p = pos & -pos;
                pos -= p;
                backtrack(row + p, (ld + p) << 1, (rd + p) >> 1);
            }
        } else {
            count++;
        }
    }
    public int getSolutionCount() {
        backtrack(0, 0, 0);
        return count;
    }
    public static void main(String[] args) {
        EightQueens eq = new EightQueens();
        System.out.println(eq.getSolutionCount()); // 输出：92
    }
}