That is an error I got when I created a "web service client" in Eclipse. Here are the details:

Java Code:
oracle.eclipse.tools.webservices.ant.GeneratedAntScriptFailedException: Generated ant script failed:
 /home/echipbk/workspace/.metadata/.plugins/oracle.eclipse.tools.webservices/ant/build.xml 
Log file:
 /home/echipbk/workspace/.metadata/.plugins/oracle.eclipse.tools.webservices/ant/build_log.txt
 Log contents:
 Buildfile: /home/echipbk/workspace/.metadata/.plugins/oracle.eclipse.tools.webservices/ant/build.xml
Trying to override old definition of datatype wsgen

fork_build_client:
     [java] Buildfile: /home/echipbk/workspace/.metadata/.plugins/oracle.eclipse.tools.webservices/ant/build.xml
     [java] 
     [java] build_client:
     [java] Trying to override old definition of datatype clientgen
     [java] [clientgen] System property "weblogic.wsee.client.ssl.stricthostchecking" is not supported
     [java] [clientgen] Ignoring JAX-RPC options - building a JAX-WS client
     [java] [clientgen] 
     [java] [clientgen] *********** jax-ws clientgen attribute settings ***************
     [java] [clientgen] 
     [java] [clientgen] wsdlURI: http://www-student.it.uts.edu.au/~chw/cc.php?wsdl
     [java] [clientgen] packageName : null
     [java] [clientgen] destDir : /tmp/_vhn32z
     [java] [clientgen] 
     [java] [clientgen] *********** jax-ws clientgen attribute settings end ***************
     [java] [clientgen] Consider using <depends>/<produces> so that wsimport won't do unnecessary compilation
     [java] [clientgen] parsing WSDL...
     [java] [clientgen] 
     [java] [clientgen] 
     [java] [clientgen] 
     [java] [clientgen] Generating code...
     [java] [clientgen] 
     [java] [clientgen] 
     [java] [clientgen] Compiling code...
     [java] [clientgen] 
     [java] [clientgen] [ERROR] com.sun.tools.javac.Main is not available in the classpath, requires Suns JDK version 5.0 or latter.
     [java] [clientgen] 
     [java] [clientgen] 
     [java] [clientgen] compilation failed, errors should have been reported
     [java] [clientgen] Command invoked: wsimport /home/echipbk/Oracle/Middleware/Oracle_Home/oracle_common/jdk/jre/bin/java -d /tmp/_vhn32z -extension -XuseBaseResourceAndURLToLoadWSDL -keep -s /tmp/_vhn32z http://www-student.it.uts.edu.au/~chw/cc.php?wsdl