在8×8的国际象棋棋盘上放置8个皇后，要求任意两个皇后不能在同一行、同一列或同一条对角线上。

在8X8空棋盘上摆放八个皇后，并使其中任意两个皇后不能在同一行或同一列或同一对角线

代码：

package test;

import javax.swing.JOptionPane;
import javax.swing.JTextArea;

public class Queen {
	int[] a = new int[8];
	int[] b = new int[15];
	int[] c = new int[15];
	int[][] Queen = new int[8][8];

	void next(int i) {
		for (int j = 0; j < 8; j++) {
			if (a[j] == 0 && b[i + j] == 0 && c[i - j + 7] == 0) {
				a[j] = b[i + j] = c[i - j + 7] = 1;
				Queen[i][j] = 1;
				if (i < 7)
					next(i + 1);
				else {
					String output = new String();
					for (int m = 0; m < 8; m++) {
						for (int n = 0; n < 8; n++)
							output += "   " + Queen[m][n] + "   ";
						output += "\n";
					}
					JTextArea outputArea = new JTextArea();
					outputArea.setText(output);
					JOptionPane.showMessageDialog(null, outputArea,
							"One possible distribution",
							JOptionPane.INFORMATION_MESSAGE);
				}
				a[j] = b[i + j] = c[i - j + 7] = Queen[i][j] = 0;
			}
		}
	}

	public static void main(String args[]) {
		Queen one = new Queen();
		one.next(0);
		System.exit(0);
	}
}