JAVA_HOME 指向无效的 Java 安装

Question

I set JAVA_HOME in my windows 10. When I check java version I get next:

C:\>java -version
java version "1.8.0_221"
Java(TM) SE Runtime Environment (build 1.8.0_221-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)

Although, I can check the javac version:

C:\>javac -version
javac 1.8.0_221

I can start any jar:

D:\>java -jar authTest.jar
Hello world!!!

But when I try start elastic search I get an exception:

D:\elasticsearch-2.3.0>bin\service.bat install
JAVA_HOME points to an invalid Java installation (no java.exe found in "C:\Program Files\Java\jdk1.8.0_221;"). Exiting...

But if set JAVA_HOME manually in console

D:\elasticsearch-2.3.0>set JAVA_HOME=C:\Program Files\Java\jdk1.8.0_221

Service start successfully:

D:\elasticsearch-2.3.0>bin\service.bat install
Installing service      :  "elasticsearch-service-x64"
Using JAVA_HOME (64-bit):  "C:\Program Files\Java\jdk1.8.0_221"
The service 'elasticsearch-service-x64' has been installed.

But if when I reopen cmd - I need to repeat all steps. Why do I need to set JAVA_HOME each time in cmd?

Answer 1

If I see right, there is a ";" at the end of your JAVA_HOME path. Running Jars and javac use PATH environment variable, and are not affected by this.

You can delete the trailing ";" by clicking "edit text" when you are in the windows that allows you to add or remove values of your JAVA_HOME.

Answer 2

Hi I think PROPERTIES for JAVA_HOME is not setting which may cause getting this error. either you can set this in environment variable and then restart your system. or u open cmd run > set and enter this will work.

Answer 3

您可能未定义 java 路径，但在 $PATH 中定义了 jvm 的绝对路径，因此只需进入您的资源管理器 > 这台电脑 > 高级设置 > 环境变量 > 并添加一个带有路径的 JAVA_HOME 变量jvm 可执行文件是