正则表达式通配符.如何转化为普通字符的点

package com.popoaichuiniu.jacy;

public class Test {

    public static void main(String[] args) {
        String fileName="xxxx.jpg";
        String fileNames []=fileName.split("\\.");
        System.out.println(fileNames.length);
        for(int i=0;i<fileNames.length;i++)
        {
            System.out.println(fileNames[i]+i);
        }

    }

}

结果： 2 xxxx0 jpg1