Ubuntu上跑apache ant 出現錯誤 - Linux

大家好, 本身還是Linux新手
使用的是Ubuntu12.10
最近在安裝一套軟體的時候出了一點錯誤
我找了好久都找不到問題出現在那裏
還煩請各位高手幫我解決!!

================以下正文=========

我現在再裝一個execution monitor
他需要JDK跟Apache ant才能安裝
所以我安裝了JDK1.7.0 還有ant1.9.1
問題出在於我打ant build的時候出現了這些錯誤

/home/sugarfree/桌面/sctg_2013_01_23/sources/execution_monitor/build.xml:153:
java.lang.ClassCastException: com.sun.codemodel.JCodeModel$JReferencedClass
cannot be cast to java.lang.Comparable
at java.util.TreeMap.compare(TreeMap.java:1188)
at java.util.TreeMap.put(TreeMap.java:531)
at java.util.TreeSet.add(TreeSet.java:255)
at com.sun.codemodel.JMethod._throws(JMethod.java:104)
at com.sun.codemodel.JMethod._throws(JMethod.java:109)
at
com.sun.tools.xjc.generator.ObjectFactoryGenerator.<init>(ObjectFactoryGenerator.java:191)
at com.sun.tools.xjc.generator.PackageContext.<init>(PackageContext.java:68)
at
com.sun.tools.xjc.generator.SkeletonGenerator.<init>(SkeletonGenerator.java:143)
at
com.sun.tools.xjc.generator.SkeletonGenerator.generate(SkeletonGenerator.java:108)
at com.sun.tools.xjc.Driver.generateCode(Driver.java:366)
at com.sun.tools.xjc.XJCTask._doXJC(XJCTask.java:336)
at com.sun.tools.xjc.XJCTask.doXJC(XJCTask.java:283)
at com.sun.tools.xjc.XJCTask.execute(XJCTask.java:227)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:435)
at org.apache.tools.ant.Target.performTasks(Target.java:456)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
at
org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38)
at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:440)
at org.apache.tools.ant.taskdefs.SubAnt.execute(SubAnt.java:303)
at org.apache.tools.ant.taskdefs.SubAnt.execute(SubAnt.java:221)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:435)
at org.apache.tools.ant.Target.performTasks(Target.java:456)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
at
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
at org.apache.tools.ant.Main.runBuild(Main.java:851)
at org.apache.tools.ant.Main.startAnt(Main.java:235)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)

Total time: 1 second
make: *** [execution_monitor] Error 1

這看起來像是JDK的某個部分沒有被找到
不過我已經有設定JAVA_HOME,PATH也有指到JDK下的bin資料夾
連CLASSPATH都設定到JDK下的tools.jar及dt.jar

結果還是失敗....這問題真的困擾我好久!!!
感覺我再找不出來就要被老師砍頭了>口<

不知道各位版上高手有什麼解法呢....
有問題也請發問!!

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如果有緣，轉了地球一圈我們還會相遇的。

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