jdk環境變量配置:
![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsIyZuBnL1MzNyITMygDM3IjMwEjMwIzLc52YucWbp5GZzNmLn9Gbi1yZtl2Lc9CX6MHc0RHaiojIsJye.png)
JAVA_HOME
C:\Program Files\Java\jdk1.8.0_181
CLASSPATH
.%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar
java -version
javac
java ![在這裡插入圖檔描述](https://img-blog.csdnimg.cn/20210227083132690.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyMjk4Njcx,size_16,color_FFFFFF,t_70)