InputStreamReader & OutputStreamWriter

I thought InputStreamReader is supposed to convert bytes to characters and OutputStreamWriter is supposed to convert characters to bytes thereby bridging the gap between byte and character streams. But when i run this code i just get the same character output that i read in the first place just outputted to another file.
Shouldent the output be bytes instead of characters?

Code:

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    import java.io.*;     
 
    public class X{
      public static void main(String[] args){
      try{
        FileReader fr = new FileReader("C:\\Java\\test.txt");
        File file = new File("C:\\Java\\test.txt");
        FileOutputStream fos = new FileOutputStream("C:\\Java\\test1.txt");
        OutputStreamWriter osw = new OutputStreamWriter(fos);
       
        char[] buffer = new char[(int)file.length()];
     
      fr.read(buffer);
      osw.write(buffer);
      osw.close();
    }catch(Exception e){System.out.println(e);}
    }
  }

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