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ANT could not find class for <junit>

 
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I defined a <junit> task in my build.xml, then try to run ANT within Eclipse. But I got the following error.


Ant could not find the task or a class this task relies upon.

This is common and has a number of causes; the usual
solutions are to read the manual pages then download and
install needed JAR files, or fix the build file:
- You have misspelt 'junit'.
Fix: check your spelling.
- The task needs an external JAR file to execute
and this is not found at the right place in the classpath.
Fix: check the documentation for dependencies.
Fix: declare the task.
- The task is an Ant optional task and the JAR file and/or libraries
implementing the functionality were not found at the time you
yourself built your installation of Ant from the Ant sources.
Fix: Look in the ANT_HOME/lib for the 'ant-' JAR corresponding to the
task and make sure it contains more than merely a META-INF/MANIFEST.MF.
If all it contains is the manifest, then rebuild Ant with the needed
libraries present in ${ant.home}/lib/optional/ , or alternatively,
download a pre-built release version from apache.org
- The build file was written for a later version of Ant
Fix: upgrade to at least the latest release version of Ant
- The task is not an Ant core or optional task
and needs to be declared using <taskdef>.
- You are attempting to use a task defined using
<presetdef> or <macrodef> but have spelt wrong or not
defined it at the point of use

Remember that for JAR files to be visible to Ant tasks implemented
in ANT_HOME/lib, the files must be in the same directory or on the
classpath


My ant-junit.jar is inside the Eclipse ANT plugin lib folder:

C:\eclipse\plugins\org.apache.ant_1.6.5\lib\ant-junit.jar

I have put junit-4.5.jar inside this folder as well.

According to what is explained in this web site http://ant.apache.org/manual/OptionalTasks/junit.html, I can simply put both junit.jar and ant-junit.jar in ANT_HOME/lib.

How can I resolve this problem? Thanks.
 
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You need to add the jar file(s) to the Ant classpath in Eclipse: Window/Preferences/Ant/Runtime
 
Edmund Yong
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Thanks Ilja, now it works.
 
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