How to delete spaces between each characters of a string in a file

Question

In my program, I have a string, for example: str='abcdefg', when I print the string in command window, there is no space, everything is Ok But when I use the following method to write the string in a file(Mystring.txt):
File file= new File("C:\\MyString.txt");
fos = new FileOutputStream(file);
dos=new DataOutputStream(fos);
dos.writeChars(str);
when I open the file, between each character , there is a space, like "a b c d e f g", how to solve this problem? any idea or method?

Answer 1

The spaces appear because you are using a DataOutputStream.
In fact, a DataOutputStream uses a specific way to encode primitive types. Moreover, data written through a DataOutputStream are supposed to be read back using a DataInputStream.
You should better use a FileWriter (or an OutputStreamWriter) instead.