InputStreamReader & OutputStreamWriter

[Dillinger4]

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?

    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);}
     }
   }