1 package sundemo2; 2  3 import java.io.File;   4 import java.io.FileReader;   5 import java.io.FileWriter;   6    7 public class MainClass{   8     public static void main(String[] args) throws Exception{   9         FileManager a = new FileManager("E:\\WorkSpace\\SunDemo\\data\\demo\\a.txt",new char[]{‘\n‘});  10         FileManager b = new FileManager("E:\\WorkSpace\\SunDemo\\data\\demo\\b.txt",new char[]{‘\n‘,‘ ‘});        11         FileWriter c = new FileWriter("E:\\WorkSpace\\SunDemo\\data\\demo\\c.txt");  12         String aWord = null;  13         String bWord = null;  14         while((aWord = a.nextWord()) !=null ){  15             c.write(aWord + "\n");  16             bWord = b.nextWord();  17             if(bWord != null)  18                 c.write(bWord + "\n");  19         }  20           21         while((bWord = b.nextWord()) != null){  22             c.write(bWord + "\n");  23         }     24         c.close();  25     }       26 }  27   28 class FileManager{   29     String[] words = null;  30     int pos = 0;  31     public FileManager(String filename,char[] seperators) throws Exception{  32         File f = new File(filename);  33         FileReader reader = new FileReader(f); 34         char[] buf = new char[(int)f.length()];  35         int len = reader.read(buf);  36         String results = new String(buf,0,len);  37         String regex = null;  38         if(seperators.length > 1 ){  39             regex = "" + seperators[0] + "|" + seperators[1];  40         }else{  41             regex = "" + seperators[0];  42         }  43         words = results.split(regex);  44     }  45       46     public String nextWord(){  47         if(pos == words.length)  48             return null;  49         return words[pos++];  50     }  51 }