找不到Javac

Question

I'm running Windows 8 and I can not get javac to work.

I have set my PATH in environmental variables to

C:\\Program Files (x86)\\Java\\jdk1.7.0_17\\bin

I have tried both with and without ';' but to no avail.

I recently had this issue on my desktop and adding ; worked but it's not in this case.

I have made sure that javac does exist in the bin too.

Any suggestions on fixes would be greatly appreciated.

EDITS echo %PATH% gives:

C:\Users\Arktri\Desktop>echo %PATH%

C:\Program Files (x86)\Intel\iCLS Client\;
C:\Program Files\Intel\iCLS Client\;
C:\Windows\system32;C:\Windows;
C:\Windows\System32\Wbem;
C:\Windows\System32\WindowsPowerShell\v1.0\;
C:\Program Files (x86)\Intel\OpenCL SDK\2.0\bin\x86;
C:\Program Files (x86)\Intel\OpenCL SDK\2.0\bin\x64;
C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;
C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;
C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;
C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;;
C:\Program Files (x86)\Java\jre7\bin

And the exact error is: 'javac' is not recognized as an internal or external command, operable program or batch file.

Answer 1

As far as I can see you have the JRE in your PATH , but not the JDK .

From a command prompt try this:

set PATH=%PATH%;C:\Program Files (x86)\Java\jdk1.7.0_17\bin

Then try javac again - if this works you'll need to permanently modify your environment variables to have PATH include the JDK too.

Answer 2

1. Go to my computer;
2. Right click properties;
3. Go to advanced system settings;
4. Go to environment variables;
5. In user variables for user click on new(top new button, not on system variables);
6. Set variable name as: Path
7. Set the value of that variable to: C:\\Program Files\\Java\\jdk1.7.0_76\\bin
8. Click ok;
9. Click ok;
10. Click ok.

Now you're set. Type javac in cmd. All javac options will be displayed.

Answer 3

I'm searched many answers that suggest me to type in cmd:

set path = "%path%;c:program files\java\jdk1.7.0\bin"

but this is WRONG!

the right solution is that you leave "set" and just type

path = %path%;c:program files\java\jdk1.7.0\bin

P/s: of course you have to replace "jdk1.7.0" folder by your current java version folder. This works well on win 7 32bit, but I think it also works on win 8 - try it!

Answer 4

Start off by opening a cmd.exe session, changing directory to the "program files" directory that has the javac.exe executable and running .\\javac.exe.

If that doesn't work, reinstall java. If that works, odds are you will find (in doing that task) that you've installed a 64 bit javac.exe , or a slightly different release number of javac.exe , or in a different drive, etc. and selecting the right entry in your path will become child's play.

Only use the semicolon between directories in the PATH environment variable, and remember that in some systems, you need to log out and log back in before the new environment variable is accessible to all environments.

Answer 5

You don't have jdk1.7.0_17 in your PATH - check again. There is only JRE which may not contain 'javac' compiler.

Besides it is best to set JAVA_HOME variable, and then include it in PATH.

Answer 6

do this: 1. run CMD (WIN+R then type in CMD) 2. Type this:

set PATH=%PATH%; java installation path\\bin

Replace "java installation path" with the directory JDK is installed in, such as C:\\Program Files (x86)\\Java. Be sure to add the \\bin after the JDK directory, because this points to "javac" and "java" (BIN stands for "binaries")

This way, you can run the Java compiler from anywhere. It is impossible to CD to the JDK directory because it has a space in Program Files, and DOS will not let you CD to these directories.

Answer 7

Easiest way: search for javac.exe in windows search bar. Then copy and paste the entire folder name and add it into the environmental variables path in advanced system settings.