write

Writes count or one byte to target stream/buffer.

write(int oneByte);
write(byte[] buffer, int offset, int length);

      try(    //Try-with-resource-block
            FileWriter stream = new FileWriter("output.txt"); // create file 
            BufferedWriter output = new BufferedWriter(stream);
         ) {
 
        output.write("Hello Harddisk");             // Write to Stream
       //This is an auto-closable block so no need of "output.close();"
       }
       catch (Exception e){
 
            System.err.println("Error: " + e.getMessage());
       }

  file content: Hello Harddisk
  
  or on console, e.g. on a Android System
  System.err Error: /output.txt (Read-only file system)