public String getRandomString()
	{
		StringBuffer buffer = new StringBuffer();
		  Random random = new Random();
		 
		  String chars[] = 
		    "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z".split(",");
		 
		  for (int i=0 ; i<chars.length ; i++)
		  {
		    buffer.append(chars[random.nextInt(chars.length)]);
		  }
		 return buffer.toString();
	}