JAVA_HOME从jdk8变到jdk7错误：Error: Registry key 'Software\JavaSoft\Java Runtime Environment'\CurrentVersi

电脑装了jdk8,JAVA_HOME也是设置的8. 
不删除8变回7. 
改了JAVA_HOME，并且path值里的C:\ProgramData\Oracle\Java\javapath也删了 
运行java -version，报错 
Error: Registry key ‘Software\JavaSoft\Java Runtime Environment’\CurrentVersion’

has value ‘1.8’, but ‘1.7’ is required. 
Error: could not find java.dll 
Error: Could not find Java SE Runtime Environment.

solution 
1. 打开开始菜单，搜索regedit，打开注册表 
2. 打开”HKEY_LOCAL_MACHINE” 
3. 点击”SOFTWARE” 
4. 点击”JavaSoft” 
5. 点击”Java Runtime Environment” 
6. 选中”CurrentVersion” ，右键点击更改，改成”1.7” 
问题解决了