The Java environment variable configuration (windows 10)

1. Right-click the Computer -> Properties
2. Advanced System Settings
   • 
3. Advanced -> Environment Variables
   • 
4. Configure the environment variables (recommended: system variables)
1. 　　New JAVA_HOME
   • 
2. Create / Modify CLASSPATH
   • .;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;
   • 
3. Modify the PATH variable

   • %JAVA_HOME%\bin %JAVA_HOME%\jre\bin

     
5. cmd run java, javac detect whether the installation is successful
   •