Palindrome Permutation 带测试版

import java.util.*;
public class Solution266 {
public static String getPermutation(int n,int k)
{
k–;
int time=n-1;
int index,i,j;
int fac=1;
List list=new ArrayList();
for(i=1;i<=n;i++)
list.add(i);
StringBuffer str=new StringBuffer();
for(i=2;i