格雷码源码~~

package action;

import java.util.*;

public class GrayCode {

public static String[] grayCode(int n) {

String[] array = new String[(int) Math.pow(2, n)];

if (n == 1) {

array[0] = "0";

array[1] = "1";

return array;

}

String[] last = grayCode(n - 1);

for (int i = 0; i < last.length; i++) {

array[i] = "0" + last[i];

array[array.length - 1 - i] = "1" + last[i];

}

return array;

}

public static void main(String[] args) {

do{

Scanner in = new Scanner(System.in);

int n;

n = in.nextInt();

String[] arr = grayCode(n);

for (int i = 0; i < arr.length; i++) {

System.out.print(arr[i] + "  ");

}

}while(true);

}

}