在eclipse中设置$JAVA_HOME，但ANT找不到JAVA编译器

我将这一行添加到

/home/{user}/.bashrc

文件：

 export JAVA_HOME=/usr/lib/jvm/java-6-openjdk

但当我想在eclipse中运行ant文件时，出现了以下错误：

BUILD FAILED
/home/bakish/Work/new/hadoop-0.20.2/build.xml:316: Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK.
It is currently set to "/usr/lib/jvm/java-6-openjdk/jre"

我该怎么办

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谢谢

转到preferences/java/installed jre's

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->添加一个新的jre并选择您的jre/jdk的位置

如果答案对您有帮助，请不要忘记投票支持它，但如果我将ANT jar文件添加到jre/jdk，则会出现相同的错误->windows/preferences/ANT/runtime->add jar