FileOutputStream fos = new FileOutputStream("table.xml", false);
PrintWriter pw = null;
pw = new PrintWriter(fos);

char[] chars = lines.toCharArray();

for (int i=0; i<chars.length; i++) 		
{			
System.out.println(i);			
pw.print(chars[i]);			
pw.flush();		
}

Note: lines is a string