JDK Issue - Javac not recognised

Nic'name · 04-10-2014 4:32pm #1

I'm using a different laptop and have installed the JDK and for some reason I'm getting the "javac is not recognised" error when I try and compile my programs in command prompt. I've specified the path files in environmental variables. Any ideas of other solutions I should look into? Thanks in advance.

counterpointaud · 04-10-2014 7:13pm

Post the contents of your PATH variable, and also the location(s) of javac.exe

echo %PATH%

dir javac.exe /s /p

(might take a while)

Talisman · 05-10-2014 2:29am

JDK installation instructions : Updating the PATH Environment Variable

Buford T Justice · 05-10-2014 10:46am

what os are you using?

TarfHead · 05-10-2014 8:51pm

I have a similar, but different, problem.

I am new to Java, just started tuition in 2 weeks ago. I was provided with instructions for installing the SE Development kit on my PC (Win7, 64 bit) and for using Notepad++ to write code and macros for Compile, Run & Compile & Run.

Everything is installed and the Notepad++ macros defined. JDK installed using 'jdk-8u20-windows-x64.exe'

The Compile option runs OK, i.e. no reported errors. In other words, the macro is able to locate javac.exe.

The Run macro fails with message;

Process started >>>
Error: Registry key 'Software\JavaSoft\Java Runtime Environment'\CurrentVersion'
has value '1.7', but '1.8' is required.
Error: could not find java.dll
Error: Could not find Java SE Runtime Environment.
<<< Process finished. (Exit code 2)

The 'Run' macro comprises;

cd "$(CURRENT_DIRECTORY)"
java $(NAME_PART)

When I look at the Windows Registry, using regedit, I see a value of 1.8 for Current Version in \HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Development Kit.

I have seperately downloaded and installed the Java Runtime environment, but the error remains. JRE installed using 'jre-8u20-windows-x64.exe'

And, when I run 'javac' and 'java' on the command line, they both work.

Any hints, tips ?

srsly78 · 06-10-2014 8:18am

Update your notepad++, the java plugin is looking for an out of date version. Alternatively just edit the registry yourself. Maybe it's looking for 32bit java?

TarfHead · 06-10-2014 8:23am

Thanks
The registry shows 1.8 and Notepad++ is 'reading' 1.7. I have uninstalled and installed Notepad++ several times.

srsly78 · 06-10-2014 8:23am

Notepad++ does not work with the latest java it seems, so you have to manually hack it - or download the old java that it expects.

Try following all the steps here: https://www3.ntu.edu.sg/home/ehchua/programming/howto/JDK_Howto.html

Notepad++ config info here, mess around with this until fixed: https://www3.ntu.edu.sg/home/ehchua/programming/howto/CMD_Survival.html#NotePadPP
Try editing JavaRun.bat and JavaCompile.bat.

TarfHead · 06-10-2014 8:55am

I copped on to a different solution. Instead of just the 'java' command and relying on Notepad++/Windows to resolve the path, I put in the full directory reference to java.exe and it now works fine.

replace java $(NAME_PART)
with C:\Program Files\Java\jdk1.8.0_20\bin\java $(NAME_PART)

Thanks for your help

JDK Issue - Javac not recognised

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