Java序列化：如何使用对象InputStream /对象输出流

Question

i'm learning Java language thanks "to Deitel & Deitel How To Program in Java 10ed". But i have some problem about understanding the stream of object in file . I understand that ObjectOutputStream enables you to write Object in file. Using Book's words : ObjectOutputStream is initialized with a Stream Object , because it writes byte in the file. Instead ObjectInputStream enable you to read Object in the file . And ObjectInputStream is initialized with aa Stream Object for catch bytes from file. But what is a Stream object ? This is the code to Output:

output = new ObjectOutputStream(Files.newOutputStream( Paths.get("clients.ser")));

this is the code to input:

input = new ObjectInputStream(Files.newInputStream(Paths.get("clients.ser"));

What is Files.newOutputStream ? What Does it return ?

Thanks for Attention (if you tell me books for learning java better than mine it's very good!)

(i'm italian, so maybe my english would be not so good )

Answer 1

This method opens or creates a file and return an output stream that may be used to write bytes to the file. This returned stream is threadsafe.

For detailed description please visit: Java Doc

Answer 2

Files.newOutputStream创建一个OutputStream对象，使您可以在newOutputStream(Path path, OpenOption... options) path参数所表示的Path上写入File 。