错误：无法运行“javac -version”，请确保已安装JDK

Question

Error: Failed to run "javac -version", make sure that you have a JDK installed. You can get it from: http://www.oracle.com/technetwork/java/javase/downloads . Your JAVA_HOME is invalid: C:\\Program Files\\Java\\jdk1.8.0_152;

[ERROR] An error occurred while running cordova run android (exit code 1)

My JAVA_HOME : C:\\Program Files\\Java\\jdk1.8.0_152;C:\\Program Files\\Java\\jdk1.8.0_152\\bin;

ANDROID_HOME: C:\\Users\\Felipe\\AppData\\Local\\Android\\sdk;

Path: %SystemRoot%\\system32;%SystemRoot%;%SystemRoot%\\System32\\Wbem;%SYSTEMROOT%\\System32\\WindowsPowerShell\\v1.0\\;%JAVA_HOME%\\bin;%ANDROID_HOME%\\tools;%ANDROID_HOME%\\platform-tools;C:\\Program Files (x86)\\NVIDIA Corporation\\PhysX\\Common;C:\\Program Files (x86)\\ATI Technologies\\ATI.ACE\\Core-Static;C:\\Program Files (x86)\\Windows Live\\Shared;C:\\Program Files (x86)\\Skype\\Phone\\;C:\\Program Files\\PuTTY\\;C:\\Program Files\\Git\\cmd;C:\\Program Files\\Git\\mingw64\\bin;C:\\Program Files\\Git\\usr\\bin;C:\\Program Files\\nodejs\\;C:\\apache-ant-1.9.6\\bin;%JAVA_HOME%;C:\\Users\\Felipe\\AppData\\Local\\Android\\sdk\\build-tools\\27.0.0;C:\\Users\\Felipe\\AppData\\Local\\Android\\sdk\\tools;

Any idea why returns me this error when i try to use ionic cordova run android?

Answer 1

Search for "edit environment variables" in start. and under user variables add a new variable with name "JAVA_HOME" and value with path_to_jdk_bin.

like this

Now under system variables, the path variable should contain(add if not added) the entry %JAVA_HOME%.

Like this

Answer 2

Firstly make sure you don't have multiple java versions installed

Once you're done with that open Environment Variables tab under My computers

Create a new user variable and name it PATH

Set the user variable value as C:\\Program Files\\Java\\jdk1.8.0_151\\bin(may change depending on where you have installed java)

open cmd type javac

This should be enough to make it work

Answer 3

I've been trying to figure this out and just found a solution I haven't seen elsewhere.

I noticed I had a second version of Java installed in my Program Files (x86) directory.

Pointing the variables to that location instead, ie C:\\Program Files (x86)\\Java\\jdk1.8.0_131 and now everything works fine.

Answer 4

Try This:

In VS, open Tools menu and select Options.

In Tools for Apache Cordova select Environment Variable Overrides .

Select JAVA_HOME checkbox and browse for JDK directory.