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Java Cookbook
book

Java Cookbook

by Ian F. Darwin
June 2001
Intermediate to advanced content levelIntermediate to advanced
888 pages
21h 1m
English
O'Reilly Media, Inc.
Content preview from Java Cookbook

Returning Object Information

Problem

You need to return an object.

Solution

Create the object you need, and write it using an ObjectOutputStream created on top of the socket’s output stream.

Discussion

In the previous chapter, you saw a program that read a Date object over an ObjectInputStream. This code is the other end of that process, the DaytimeObjectServer . Example 16-5 is a server that constructs a Date object each time it’s connected to, and returns it.

Example 16-5. DaytimeObjectServer.java

/*
 */
public class DaytimeObjectServer {
    /** The TCP port for the object time service. */
    public static final short TIME_PORT = 1951;

    public static void main(String[] argv) {
        ServerSocket sock;
        Socket  clientSock;
        try {
            sock = new ServerSocket(TIME_PORT);
            while ((clientSock = sock.accept(  )) != null) {
                System.out.println("Accept from " + 
                    clientSock.getInetAddress(  ));
                ObjectOutputStream os = new ObjectOutputStream(
                    clientSock.getOutputStream(  ));

                // Construct and write the Object
                os.writeObject(new Date(  ));

                os.close(  );
            }

        } catch (IOException e) {
            System.err.println(e);
        }
    }
}
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Publisher Resources

ISBN: 0596001703Supplemental ContentCatalog PageErrata