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To begin with I carefully copied and pasted the pathway for javac into the System Variable Editing box in Advanced System Settings, making sure to carefully put it at the beginning and placing a ; after bin, before the other parts.

Then I followed the Oracle tutorial for the HelloWorldApp to the letter, setting up a my application folder and creating a notepad file inside.

Subsequent to all this, I opened the command shell in windows and punched in my script; hit dir; got the spiel about files and such; entered javac HelloWorldApp.java to only end invariably with:

"Javac not a recognised command"

Arrgh what am I doing wrong? Is it, as I suspect--that the Java SE12 isn't loaded properly (there is no .exe after my javac file).

  • Am I not saving the notepad file correctly? (ie HelloWorld?)
  • Am I not editing the path for the javac compiler properly?

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norbjd
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D.Perez
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    You forgot to add your screenshots. With that little detail, we can only guess, which is outside of the frame defined by [answer]. Your question might get down-voted or closed, please see [ask], thanks. – Zabuzard Apr 12 '19 at 17:15
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    Can we see your path entry? Looks like you're on Windows 10 and you wouldn't need to add the ; as Windows 10 does that for you. – dimwittedanimal Apr 12 '19 at 17:54
  • After editing the Path environment variable, you might want to restart the computer for it to reread the added entry – Trash Can Apr 12 '19 at 17:54
  • Yes we need more information on question and I understand your frustration. Try giving screenshots and meanwhile as a workaround, instead of javac HelloWorldApp.java try giving HelloWorldApp.java. For example if javac is in C:\jdk\bin\ then give C:\jdk\bin\javac HelloWorldApp.java – Praveen E Apr 12 '19 at 17:56
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    @AlmostHandsome: There's no need to reboot. Just restarting the command prompt is fine. – Jon Skeet Apr 12 '19 at 17:57
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    `javac` is an executable file placed under the `bin` folder for your **JDK** installation. The first thing to check, is that you installed a JDK. If you have a "simple" JRE, `javac` is not included. Go to the folder where Java is installed, then under `bin`, and check if `javac.exe` is present. – Daniele Apr 12 '19 at 18:08
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    Then, check if `javac` is available from the command line by using `javac -version`.. It should print something like `javac 1.8.0_60`; if `javac` is not found, you have to double check your `%PATH%` variable. – Daniele Apr 12 '19 at 18:10
  • @JonSkeet Last time what you said did not do it for me, had to kill the current session by logging out and in again – Trash Can Apr 12 '19 at 18:14
  • @AlmostHandsome: If you've set environment variables via the control panel applet, a new command prompt definitely picks them up. I do that regularly. – Jon Skeet Apr 12 '19 at 18:30

1 Answers1

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The first step will be to verify Java is set up correctly.

  1. Open the command prompt.
  2. Type "java -version".

  3. Press enter. This should return the version of java you are running. Something like: java version "1.8.0_151" Java(TM) SE Runtime Environment (build 1.8.0_151-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)

  4. Add the path to java to your system path.

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See these two links if you have trouble adding java to the system path.

https://warwick.ac.uk/fac/sci/dcs/people/research/csrcbc/teaching/howto/javapath/

Environment variables for java installation

  1. Once this is set try "java -version" again. (make sure to open a new command window) Only after this works try the "javac" command.
Jortega
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