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| NNTP-Posting-Date | Mon, 01 Jul 2013 03:36:27 -0500 |
| Date | Mon, 01 Jul 2013 09:36:24 +0100 |
| From | lipska the kat <"nospam at neversurrender dot co dot uk"> |
| Organization | Trollbusters 3 |
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| Subject | Re: Exception in thread “main” java.lang.NoClassDefFoundError Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.Task |
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On 01/07/13 08:14, morpheous.sigma@gmail.com wrote: > I am new to Java, although I have several years experience with other langs (e.g. C/C++ etc). I am trying to run an example program, which uses Ant for its build. I have struggled to get rid of the ClassNotFoundException being thrown for the last four days and despite trying various solutions posted elsewhere on the Internet, I have been unable to solve the problem. > > I wonder if anyone on here can help. > > Here is the stack trace, (as well as my attempts to solve the problem): Ubuntu 12.04 apache-ant-1.8.4 Firstly, the class org/apache/tools/ant/Task.class lives in ../lib/ant.jar You can use jar -tf <filename> to inspect a jar file. Setting your classpath to /usr/local/apache-ant-1.9.1/lib won't include ant.jar, try adding ant.jar to your classpath /usr/local/apache-ant-1.9.1/lib/ant.jar I think you may be able to do *.jar but you'd need to test that. I mostly use Ant in Eclipse these days where it 'just works' but I notice that all the jars in apache-ant-1.8.4/lib are explicitly added to the ant classpath in the build configuration window thingy in Eclipse. A quick DuckDuckGo tells me that opengamma is some kind of open source risk analysis thing, so I presume you downloaded a jar file[s] ... is the jar on your classpath? If not it needs to be. Strangely enough, the classpath causes a lot of problems to new users so you might find this useful http://docs.oracle.com/javase/tutorial/essential/environment/paths.html You also need to be careful when running builds from shell scripts as a new shell will be created that may not have the same environment setup as the calling shell. <snip> HTH lipska -- Lipska the Kat©: Troll hunter, sandbox destroyer and farscape dreamer of Aeryn Sun
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Exception in thread “main” java.lang.NoClassDefFoundError Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.Task morpheous.sigma@gmail.com - 2013-07-01 00:14 -0700
Re: Exception in thread “main” java.lang.NoClassDefFoundError Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.Task lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-07-01 09:36 +0100
Re: Exception in thread “main” java.lang.NoClassDefFoundError Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.Task markspace <markspace@nospam.nospam> - 2013-07-01 09:03 -0700
Re: Exception in thread “main” java.lang.NoClassDefFoundError Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.Task Lew <lewbloch@gmail.com> - 2013-07-01 17:25 -0700
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