Java Serialization : How use Object InputStream / Object Output Stream

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 a a 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 )

A very important source of information is the Javadoc of the classes : docs.oracle.com/javase/8/docs/api/java/nio/file/… — Arnaud
– Arnaud, Commented Jun 20, 2017 at 12:54

Mohit Tyagi · Accepted Answer · 2017-06-20 13:15:14Z

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

answered Jun 20, 2017 at 13:15

Mohit Tyagi

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2 Comments

Christian Over a year ago

Is correct think that say "return an output stream" is like say "return a reference to file" ? Maybe my problem is that i started to program in C so it easier for me think to a a FILE pointer

Mohit Tyagi Over a year ago

Yes you are right, it will return a reference to file.

V. Singh · Accepted Answer · 2017-06-20 13:02:03Z

0

Files.newOutputStream creates an OutputStream object enabling you to write to a File on the Path denoted by path argument of newOutputStream(Path path, OpenOption... options).

answered Jun 20, 2017 at 13:02

V. Singh

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