1,首先先将环境变量里的变量值JAVA_HOME,JRE_HOME都改成是1.6的。
Win+R cmd 输入java -version发现版本依然是1.8
2,打开控制面板–>程序–>Java–>Java(Java控制面板中)–>如下
![5edeb798d0ee4ff2963bf604b7642367.png 5edeb798d0ee4ff2963bf604b7642367.png](https://ucc.alicdn.com/pic/developer-ecology/d48ef9e62bc54417ba9babf923a2af65.png?x-oss-process=image/resize,w_1400/format,webp)
3,接着打开注册表进行如下操作
![ab87e2a7ee6d4f5faafbd7a5a384cb1f.png ab87e2a7ee6d4f5faafbd7a5a384cb1f.png](https://ucc.alicdn.com/pic/developer-ecology/d148a7088a0349db9edb475e7e78a552.png?x-oss-process=image/resize,w_1400/format,webp)
4,然后先查看使用java -veison依然不行,查看java的路径
![2c84d6bc24974f7fbef679890f248eac.png 2c84d6bc24974f7fbef679890f248eac.png](https://ucc.alicdn.com/pic/developer-ecology/2735405df18e4fc2b5201d49951354e7.png?x-oss-process=image/resize,w_1400/format,webp)
5,进入如上目录
C:\Program Files (x86)\Common Files\Oracle\Java\javapath
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6,把jdk6下的如下文件,覆盖到上面的目录下
![53b4cbfe0f014bfdba5b671ff5e061bc.png 53b4cbfe0f014bfdba5b671ff5e061bc.png](https://ucc.alicdn.com/pic/developer-ecology/2d38b208c2794b868f93c03a0a7140c5.png?x-oss-process=image/resize,w_1400/format,webp)
7,接着查看一下版本,修改成功。
![97cc0d78f3954055992be530b8b2e3e7.png 97cc0d78f3954055992be530b8b2e3e7.png](https://ucc.alicdn.com/pic/developer-ecology/e8cf9f1350424d6690c29cbbe2df6849.png?x-oss-process=image/resize,w_1400/format,webp)