linux系统下jdk是已经安装好的情况之下软件出现
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:
/usr/local/eclipse/jre/bin/java java in your current PATH
解决办法是在终端进入你的eclipse目录，然后输入：
mkdir jre
cd jre
ln -s 你的JDK目录/bin