编写一个程序，将a.txt文件中的单词与b.txt文件中的单词交替合并到c.txt文件中，a.txt文件中的单词用回车符分隔，b.txt文件中用回车或空格进行分隔

 package sundemo2;

 import java.io.File;
 import java.io.FileReader;
 import java.io.FileWriter;  

 public class MainClass{
     public static void main(String[] args) throws Exception{
         FileManager a = new FileManager("E:\\WorkSpace\\SunDemo\\data\\demo\\a.txt",new char[]{'\n'});
         FileManager b = new FileManager("E:\\WorkSpace\\SunDemo\\data\\demo\\b.txt",new char[]{'\n',' '});
         FileWriter c = new FileWriter("E:\\WorkSpace\\SunDemo\\data\\demo\\c.txt");
         String aWord = null;
         String bWord = null;
         while((aWord = a.nextWord()) !=null ){
             c.write(aWord + "\n");
             bWord = b.nextWord();
             if(bWord != null)
                 c.write(bWord + "\n");
         }  

         while((bWord = b.nextWord()) != null){
             c.write(bWord + "\n");
         }
         c.close();
     }
 }  

 class FileManager{
     String[] words = null;
     int pos = 0;
     public FileManager(String filename,char[] seperators) throws Exception{
         File f = new File(filename);
         FileReader reader = new FileReader(f);
         char[] buf = new char[(int)f.length()];
         int len = reader.read(buf);
         String results = new String(buf,0,len);
         String regex = null;
         if(seperators.length > 1 ){
             regex = "" + seperators[0] + "|" + seperators[1];
         }else{
             regex = "" + seperators[0];
         }
         words = results.split(regex);
     }  

     public String nextWord(){
         if(pos == words.length)
             return null;
         return words[pos++];
     }
 }