[JSch-users] Provide More Information in Exception

[温. <we...@fo...>]

Hi,

I am reading code of below method and found there is one exception thrown with little information which is not helpful for end users.
com.jcraft.jsch.Session.connect(int)

        while (true) {
            buf = read(buf);
            if (kex.getState() == buf.getCommand()) {
                kex_start_time = System.currentTimeMillis();
                boolean result = kex.next(buf);
                if (!result) {
                    //System.err.println("verify: "+result);
                    in_kex = false;
                    throw new JSchException("verify: " + result);
                }
            } else {
                in_kex = false;
                throw new JSchException("invalid protocol(kex): " + buf.getCommand());
            }
            if (kex.getState() == KeyExchange.STATE_END) {
                break;
            }
        }

The JSchException("verify:"+result) will result in below stack trace when it is thrown:

    Caused by: com.jcraft.jsch.JSchException: verify: false     	at com.jcraft.jsch.Session.connect(Session.java:305)     	at com.jcraft.jsch.Session.connect(Session.java:158)     	at com.ericsson.commonlibrary.nealservices.fault.NodeSftp.connect(NodeSftp.java:44)     	... 37 more
This kind of exception message is almost useless for end users, especially for those newbies. So, could you please refine this and make it more readable and understandable? Thanks!