/*
Java SequenceInputStream class is used to read data 
from multiple streams. 
It reads data sequentially (one by one).

*/
import java.io.*;    
class SeqInputTest{    
  public static void main(String args[])throws Exception{    
   FileInputStream fin1=new FileInputStream("test1.txt");    
   FileInputStream fin2=new FileInputStream("test2.txt");    
   FileOutputStream fout=new FileOutputStream("testout.txt");      
   SequenceInputStream sis=new SequenceInputStream(fin1,fin2);    
   int i;    
   while((i=sis.read())!=-1)    
   {    
     fout.write(i);        
   }    
   sis.close();    
   fout.close();      
   fin1.close();      
   fin2.close();       
   System.out.println("Success..");  
  }    
}    


/*
FileInputStream fin=new FileInputStream("a.txt");    
FileInputStream fin2=new FileInputStream("b.txt");    
FileInputStream fin3=new FileInputStream("c.txt");    
FileInputStream fin4=new FileInputStream("d.txt");       
Vector v=new Vector();    
v.add(fin);    
v.add(fin2);    
v.add(fin3);    
v.add(fin4);                 
Enumeration e=v.elements();       
SequenceInputStream bin=new SequenceInputStream(e);    
*/