错误信息：
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:
C:\Program Study\eclipse\jre\bin\javaw.exe
javaw.exe in your current PATH
解决方法：
查看JDK环境配置，JAVA_HOME（重点，检查一下JDK的引导安装目录是否正确） 、CLASSPATH、Path