JDK Issue - Javac not recognised

Nic'name

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

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

JDK installation instructions : Updating the PATH Environment Variable

Buford T Justice

what os are you using?

TarfHead

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

Update your notepad++, the java plugin is looking for an out of date version.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

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

srsly78

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

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