How to send a string array using sockets and objectoutputstream

Question

I have this to send string or integer but if i want to send a string array what should i use?

  // A string ("Hello, World").
    out.write("Hello, World".getBytes());

    // An integer (123).
    out.write(ByteBuffer.allocate(4).putInt(123).array());

Thanks in advance

I highly recommend using .getBytes( "UTF-8" ) to get safe byte encoding for your string. — Alexander Pogrebnyak
– Alexander Pogrebnyak, Commented Aug 19, 2011 at 20:53

skaffman · Accepted Answer · 2011-08-19 20:48:36Z

6

Just write the array

ObjectOutputStream out = ...
String[] array = ...     
out.writeObject(array);

If you're using ObjectOutputStream, there's no need to muck about with byte arrays - the class provides high-level methods to read and write entire objects.

Similarly:

out.writeInt(123);
out.writeObject("Hello, World");

You only need to use the write(byte[]) methods if you're using the raw, low-level OutputStream class.

answered Aug 19, 2011 at 20:48

skaffman

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3 Comments

Alexander Pogrebnyak Over a year ago

Not to mention safe string encoding.

Kushal Over a year ago

how can one read the same written array using ObjectInputStream readObject()?

skaffman Over a year ago

@Kush: By casting it. Arrays are objects.

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