ubuntu下JDK已安装成功，但eclipse无法安装啊！

这是我的配置：

mrholiday@ubuntu:~$ echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/mrholiday/Develop/JDK/jdk1.7.0_07/bin

mrholiday@ubuntu:~$ echo $CLASSPATH
.:/home/mrholiday/Develop/JDK/jdk1.7.0_07/lib:/home/mrholiday/Develop/JDK/jdk1.7.0_07/jre/lib

mrholiday@ubuntu:~$ java -version
java version "1.7.0_07"
Java(TM) SE Runtime Environment (build 1.7.0_07-b10)
Java HotSpot(TM) 64-Bit Server VM (build 23.3-b01, mixed mode)

在打开eclipse的时候还是出现：
A Java Runtime Environment (JRE) or Java Development Kit (JDK)
must be available in order to run Eclipse. No Java virtual machine
was found after searching the following locations:
/home/mrholiday/Develop/eclipse/jre/bin/java
java in your current PATH

我看它说的是在eclipse文件夹下的jre。。。
我需要把JDK中的jre复制过来然后添加这样一个路径吗？