Search code examples
javaant

'"java.exe"' is not recognized as an internal or external command,

I have downloaded both Java jdk1.7.0_06 and Java jre7. and i added the following system variable JAVA_HOME C:\Program Files\Java\jdk1.7.0_06\bin to my windows 7. But when I type the following in the CMD command line on my windows 7 C:\activiti-5.10\activiti-5.10\setup>ant demo.start to run a demo application I got the following error in the command line '

"java.exe"' is not recognized as an internal or external command, operable program or batch file

So does anyone know how i can solve this problem ? BR

Solution

  • If you look at the "ant.bat" file, you will see that it looks for the "java" command in the following way:

    1. If the %JAVACMD% environment variable is set, then it uses that.
    2. Otherwise, if the %JAVA_HOME% environment variable is set, it tries to use %JAVA_HOME%\bin\java.exe
    3. Otherwise, it tries to use java.exe; i.e. it will look on your %PATH%.

    In your case, you have %JAVA_HOME% set ... but set to the Java installation's "bin" directory, not to the root of the installation. So the Ant.bat script looks in the wrong place for java.exe.

    Just set %JAVA_HOME% correctly, and it should work.

    JAVA_HOME C:\Program Files\Java\jdk1.7.0_06

    As you can see from the above, you do not need to have the Java "bin" directory on your %PATH% for Ant to work, but it is a good idea to set it anyway. That way you can run the Java commands simply from the command line.

    The setting of %CLASSPATH% is not relevant to this problem. Indeed, unless the build.xml file is broken, Ant will ignore your %CLASSPATH% environment variable.