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

Question

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

Answer 1

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 ; ie 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.

Answer 2

您需要将文件 java.exe 放在 PATH 变量中，但将 JRE 放在 JAVA_HOME 中

Answer 3

Typically JAVA_HOME should be the parent directory of the "bin" folder.(jre or jdk)

In this case ant expects the java to be from the JDK.

try following in a cmd window

set JAVA_HOME=C:\Program Files\Java\jdk1.7.0_06
set path="%JAVA_HOME%/bin;%path%;
ant

(side note: adding java.exe to path is not a requirement for ant; it is a convenience thing for the user)

Answer 4

JAVA_HOME is the path of JDK root folder.eg: C:\\Program Files\\Java\\jdk1.7.0_06 but path define C:\\Program Files\\Java\\jdk1.7.0_06\\bin

JAVA_HOME C:\Program Files\Java\jdk1.7.0_06
JRE_HOME C:\Program Files\Java\jre1.7.0_06
path = C:\Program Files\Java\jdk1.7.0_06\bin;C:\Program Files\Java\jre1.7.0_06\bin

Answer 5

Just delete the following set of files from your %windir/System32 folder. Actually deleting java.exe is enough but for consistency sake just delete all the java related binaries.

1. java.exe
2. javaw.exe
3. javaws.exe

Actually oracle windows installer places a copy of these files into %windir/System32 folder (which I don't understand why) but looks like they are not needed (as they are available anyway under JDK folder where you install them).

I have tried all the various solutions posted in the SO and other forums as well but none of them worked for me. I have also set all the relevant environment variables (JAVA_PATH, CLASS_PATH etc) correctly as well. Finally this is the only solution that has worked for me.

Answer 6

Go to the \\squirrel-sql-3.9.0>squirrel-sql.bat .open that squirrel-sql.bat in Notepad and comment out the existing logic which is

=======================================
if exist "%IZPACK_JAVA%\bin\javaw.exe" (
  set LOCAL_JAVA=%IZPACK_JAVA%\bin\javaw.exe
) else (
  set LOCAL_JAVA=javaw.exe
)

echo Using java: %LOCAL_JAVA%
=================================

and add the below logic

@echo off

set LOCAL_JAVA=C:\Program Files (x86)\Java\jre7\bin\javaw.exe

echo Using java: %LOCAL_JAVA%
================================

make sure you add the correct path of javax.exe while adding above logic set LOCAL_JAVA=

and start the .bat file from CMD ..that's it. It should work. It worked for me.

Answer 7

I started getting this error in Android Studio after I updated it to version "Electric Eel".

It happened because Android Studio has changed where they put their JRE:

• it used to be C:\Program Files\Android\Android Studio\jre
• but now it is C:\Program Files\Android\Android Studio\jbr

To fix:

1. updated my JAVA_HOME environment variable to point to the new java location ( C:\Program Files\Android\Android Studio\jre )
2. and then restarted Android Studio , and now it is fixed.

Answer 8

我同意上面的解释，但如果问题仍然存在，请尝试设置：CLASSPATH = C:\\Program Files\\Java\\jdk1.7.0_06\\bin