socket

[Patrick Wallingford]

Hm, I can seem to compile this in Eclipse, but not in command line tools.
What am I missing?

SSLSocket.java:17: incompatible types
found : java.net.Socket
required: SSLSocket
SSLSocket socket =
SSLSocketFactory.getDefault().createSocket(TARGET_HTTPS_SERVER,
TARGET_HTTPS_PORT);

-- code --

import java.io.*;
import java.net.*;
import javax.net.*;
import javax.net.ssl.*;
import java.security.*;
import java.security.cert.Certificate;

public class SSLTest {

private SSLSession sslSession = null;

public static final String TARGET_HTTPS_SERVER = "localhost";
public static final int TARGET_HTTPS_PORT = 8443;

public static void main(String[] args) throws Exception {

SSLSocket socket = (SSLSocket) SSLSocketFactory.getDefault().
createSocket(TARGET_HTTPS_SERVER, TARGET_HTTPS_PORT);

SSLSession sslSession = socket.getSession();

Certificate[] localCerts = null;
Certificate[] peerCerts = sslSession.getPeerCertificates();

etc...

 

[wesley.hall]

Hm, I can seem to compile this in Eclipse, but not in command line tools.
What am I missing?

You seem to be compiling two different versions of the source code...
look...

SSLSocket.java:17: incompatible types
found : java.net.Socket
required: SSLSocket
SSLSocket socket =
SSLSocketFactory.getDefault().createSocket(TARGET_HTTPS_SERVER,
TARGET_HTTPS_PORT);

Notice how the line here does NOT have the cast to SSLSocket?

-- code --

SSLSocket socket = (SSLSocket) SSLSocketFactory.getDefault().
createSocket(TARGET_HTTPS_SERVER, TARGET_HTTPS_PORT);

Notice how this one does!

The cast is required because createSocket returns a Socket not an
SSLSocket.

 

[Chris Uppal]

Patrick Wallingford wrote:

Error message

found : java.net.Socket
required: SSLSocket
SSLSocket socket =
SSLSocketFactory.getDefault().createSocket(TARGET_HTTPS_SERVER,
Code:
SSLSocket socket = (SSLSocket) SSLSocketFactory.getDefault().
createSocket(TARGET_HTTPS_SERVER, TARGET_HTTPS_PORT);

Note that the error message doesn't match the code. The code you posted has an
explicit cast of the returned value from createSocket(), whereas the code the
compiler is moaning about lacks that cast. So the compiler refuses the
assignment of a Socket reference to a SSLSocket variable.

-- chris

 

[Patrick Wallingford]

Whoa,

My bad. The actual error is, when I do make the cast, it works on Eclipse
but fails on command line compiling giving the following error:

SSLSocket.java:17: inconvertible types
found : java.net.Socket
required: SSLSocket
SSLSocket socket = (SSLSocket)
SSLSocketFactory.getDefault().createSocket(TARGET_HTTPS_SERVER,
TARGET_HTTPS_PORT);

 

[Chris Uppal]

My bad. The actual error is, when I do make the cast, it works on Eclipse
but fails on command line compiling giving the following error:

SSLSocket.java:17: inconvertible types
found : java.net.Socket
required: SSLSocket
SSLSocket socket = (SSLSocket)
SSLSocketFactory.getDefault().createSocket(TARGET_HTTPS_SERVER,
TARGET_HTTPS_PORT);

I can't think of anything specific. It /should/ work (the IDE is correct). It
seem that the problem must be some sort of configuration/classpath issue with
the command-line tools, but I can't guess what from here.

Two things to try:

Execute
java -version
and
javac -J-showversion

to check that both commands, "java" and "javac", are actually resolving to the
Java installation that you expect. If you are using, say, Ant to build, then
you'll have to work harder to find out what's really going on :-(

Try (if you haven't already) being explicit about
import javax.net.ssl.SSLSocket;
in your Java source, just in case "SSLSocket" is resolving to something weird.
(Since you are using Eclipse, the chances are that you /are/ doing that
already).

Beyond that, I'm afraid, I have no other suggestions.

-- chris