域名翻转

package com.baobaotao.ditype;

import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test
{
    public static String reverse(String str,int start,int end)
    {
        char s[]=str.toCharArray();
        while(start<=end)
        {
            char t=s[start];
            s[start]=s[end];
            s[end]=t;
            start++;
            end--;
        }
        str=new String(s);
        
        return str;
    }
    public static String reverseDomain(String str)
    {
        str=reverse(str,0,str.length()-1);
        int index[]=new int[10];
        for(int i=0;i<index.length;i++)
        {
            index[i]=-1;
        }
        int j=-1;
        for(int i=0;i<str.length();i++)
        {
            char c=str.charAt(i);
            if(c=='.')
            {
                j++;
                index[j]=i;
            }
        }
        index[++j]=str.length();//设置结束位置
        int start=0;
        int end;
        for(int ind=0;ind<index.length&&index[ind]!=-1;ind++)
        {
            end=index[ind]-1;
            str=reverse(str,start,end);
            start=index[ind]+1;
        }
        return str;
        
    }
    public static void main(String[] args)
    {

        String str="www.baibaitao.comm";
        str=reverseDomain(str);
        System.out.println(str);
        
    }
}