无法通过套接字传输文件，java

here's a little code. This class runs on two computers, one side sends a file (send()) and the other one recieves it (read()). I know send() works because when i run school solution (its an assignment) it can download a file from me, but for some reason when i try to download the file is created (by the constructor) but read doesn't write anything into the file. here's a little code. This class runs on two co