Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.java.help > #2076
| From | Knute Johnson <nospam@knutejohnson.com> |
|---|---|
| Newsgroups | comp.lang.java.help |
| Subject | Re: Newbie is puzzled over CLASSPATH |
| Date | 2012-09-02 18:32 -0700 |
| Organization | A noiseless patient Spider |
| Message-ID | <k211av$j6m$1@dont-email.me> (permalink) |
| References | <aai5hsFppkU1@mid.individual.net> |
On 9/2/2012 3:39 PM, Redcat wrote:
> I've been programming for a good while, but am new to Java. I've been
> trying to answer my own questions by doing online research, but I've seem
> to hit a wall.
>
> I have Java EE installed at /usr/local/glassfish3. I've got JAVAHOME set
> to /usr/local/glassfish3/jdk7 and CLASSPATH set to /usr/local/glassfish3/
> jdk7/lib. All was seeming to go smoothly with my Java development until I
> installed Apache HTTPComponents. I copied the jar files to /usr/local/
> glassfish3/jdk7/lib.
>
> I've got a simple HTTPComponents example program that I grabbed off the
> web. When I run javac against it I get errors reporting that the
> HTTPComponents files can't be found. Another simple Java program that
> displays my classpath, and it shows the path I set it to.
>
> My example program is:
> package org.apache.http.examples.client;
>
> import org.apache.http.HttpEntity;
> import org.apache.http.HttpResponse;
> import org.apache.http.auth.AuthScope;
> import org.apache.http.auth.UsernamePasswordCredentials;
> import org.apache.http.client.methods.HttpGet;
> import org.apache.http.impl.client.DefaultHttpClient;
> import org.apache.http.util.EntityUtils;
>
> /**
> * A simple example that uses HttpClient to execute an HTTP request
> against
> * a target site that requires user authentication.
> */
> public class ClientAuthentication {
>
> public static void main(String[] args) throws Exception {
> DefaultHttpClient httpclient = new DefaultHttpClient();
> try {
> httpclient.getCredentialsProvider().setCredentials(
> new AuthScope("50.17.237.39", 80),
> new UsernamePasswordCredentials("test", "test"));
>
> HttpGet httpget = new HttpGet("http://50.17.237.39/test");
> System.out.println("executing request" +
> httpget.getRequestLine());
> HttpResponse response = httpclient.execute(httpget);
> HttpEntity entity = response.getEntity();
>
> System.out.println
> ("----------------------------------------");
> System.out.println(response.getStatusLine());
> if (entity != null) {
> System.out.println("Response content length: " +
> entity.getContentLength());
> }
> EntityUtils.consume(entity);
> } finally {
> // When HttpClient instance is no longer needed,
> // shut down the connection manager to ensure
> // immediate deallocation of all system resources
> httpclient.getConnectionManager().shutdown();
> }
> }
> }
>
> The error message I get is:
> dan@dan-Aspire-4730Z:~/development$ javac ClientAuthentication.java
> ClientAuthentication.java:3: error: cannot find symbol
> import org.apache.http.HttpEntity;
> ^
> symbol: class HttpEntity
> location: package org.apache.http
> ClientAuthentication.java:4: error: cannot find symbol
> import org.apache.http.HttpResponse;
> ^
> symbol: class HttpResponse
> location: package org.apache.http
> ClientAuthentication.java:5: error: package org.apache.http.auth does not
> exist
> import org.apache.http.auth.AuthScope;
> ^
> ClientAuthentication.java:6: error: package org.apache.http.auth does not
> exist
> import org.apache.http.auth.UsernamePasswordCredentials;
> ^
> ClientAuthentication.java:7: error: package org.apache.http.client.methods
> does not exist
> import org.apache.http.client.methods.HttpGet;
> ^
> ClientAuthentication.java:8: error: package org.apache.http.impl.client
> does not exist
> import org.apache.http.impl.client.DefaultHttpClient;
> ^
> ClientAuthentication.java:9: error: package org.apache.http.util does not
> exist
> import org.apache.http.util.EntityUtils;
> ^
> ClientAuthentication.java:18: error: cannot find symbol
> DefaultHttpClient httpclient = new DefaultHttpClient();
> ^
> symbol: class DefaultHttpClient
> location: class ClientAuthentication
> ClientAuthentication.java:18: error: cannot find symbol
> DefaultHttpClient httpclient = new DefaultHttpClient();
> ^
> symbol: class DefaultHttpClient
> location: class ClientAuthentication
> ClientAuthentication.java:21: error: cannot find symbol
> new AuthScope("50.17.237.39", 80),
> ^
> symbol: class AuthScope
> location: class ClientAuthentication
> ClientAuthentication.java:22: error: cannot find symbol
> new UsernamePasswordCredentials("test", "test"));
> ^
> symbol: class UsernamePasswordCredentials
> location: class ClientAuthentication
> ClientAuthentication.java:24: error: cannot find symbol
> HttpGet httpget = new HttpGet("http://50.17.237.39/test");
> ^
> symbol: class HttpGet
> location: class ClientAuthentication
> ClientAuthentication.java:24: error: cannot find symbol
> HttpGet httpget = new HttpGet("http://50.17.237.39/test");
> ^
> symbol: class HttpGet
> location: class ClientAuthentication
> ClientAuthentication.java:27: error: cannot find symbol
> HttpResponse response = httpclient.execute(httpget);
> ^
> symbol: class HttpResponse
> location: class ClientAuthentication
> ClientAuthentication.java:28: error: cannot find symbol
> HttpEntity entity = response.getEntity();
> ^
> symbol: class HttpEntity
> location: class ClientAuthentication
> ClientAuthentication.java:35: error: cannot find symbol
> EntityUtils.consume(entity);
> ^
> symbol: variable EntityUtils
> location: class ClientAuthentication
> 16 errors
>
> I even tried to point the compiler to the directory into which I
> extracted the file, with:
> javac -cp /home/dan/Downloads/httpcomponents-client-4.2.1/lib:$CLASSPATH
> ClientAuthentication.java
> and get the same results.
>
> I'm obviously missing something. Could anyone point me to what I might be
> overlooking?
>
The CLASSPATH, whether the environment variable or the -cp option, must
point to the directory where there are .class files and/or the specific
jar(s) themselves where those .class files reside. Don't forget the
current working directory.
--
Knute Johnson
Back to comp.lang.java.help | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Newbie is puzzled over CLASSPATH Redcat <redcat@catfolks.net> - 2012-09-02 22:39 +0000
Re: Newbie is puzzled over CLASSPATH Jeff Higgins <jeff@invalid.invalid> - 2012-09-02 19:53 -0400
Re: Newbie is puzzled over CLASSPATH Jeff Higgins <jeff@invalid.invalid> - 2012-09-02 20:22 -0400
Re: Newbie is puzzled over CLASSPATH Jeff Higgins <jeff@invalid.invalid> - 2012-09-02 20:01 -0400
Re: Newbie is puzzled over CLASSPATH Jeff Higgins <jeff@invalid.invalid> - 2012-09-02 20:08 -0400
Re: Newbie is puzzled over CLASSPATH Lew <noone@lewscanon.com> - 2012-09-04 03:13 -0700
Re: Newbie is puzzled over CLASSPATH markspace <-@.> - 2012-09-02 18:04 -0700
Re: Newbie is puzzled over CLASSPATH Lew <noone@lewscanon.com> - 2012-09-04 03:17 -0700
Re: Newbie is puzzled over CLASSPATH Knute Johnson <nospam@knutejohnson.com> - 2012-09-02 18:32 -0700
Re: Newbie is puzzled over CLASSPATH Roedy Green <see_website@mindprod.com.invalid> - 2012-09-03 02:07 -0700
csiph-web