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I'm having a problem when running programs that use Java from the command line. I get back a message saying Java.exe could not be found.

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I've followed the instructions found in several places for setting JAVA_HOME in Windows 7.

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As can be seen in the image I'm pointing to the JDK folder as instructed, I've also tried several variations including linking to the bin folder(where java.exe is located).

What am I doing wrong, and how can I debug this.

EDIT:

Typing Set in Command Prompt outputs

enter image description here

Sathiamoorthy
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Philip Kirkbride
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    Did you restart your command console? environment variable changes don't take effect until the console has been closed and re-opened. Also you may need to add JAVA_HOME to your PATH environment variable. You can do this by editing the path and adding the entry `%JAVA_HOME%;` – Hunter McMillen Jun 22 '12 at 17:29

5 Answers5

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If you don't have admin rights, use the below command to set environment variables for java using the command prompt

setx JAVA_HOME "C:\Program Files\Java\jdk1.8.0"
setx PATH "%PATH%;%JAVA_HOME%\bin";

Modify the environment variable.

setx -m JAVA_HOME "C:\Program Files\Java\jdk1.8.0"
setx -m PATH "%PATH%;%JAVA_HOME%\bin";
Sathiamoorthy
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8

Make sure that the jdk.xxxxx/jre/bin folder is in your PATH

Jeremy
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  • Notice the part of my question where I say " I've also tried several variations including linking to the bin folder(where java.exe is located)." Have tried it from the bin and I still get the same behavior. Restarted the command prompt but not the computer. – Philip Kirkbride Jun 22 '12 at 17:46
  • JAVA_HOME and PATH are different, I didn't say point JAVA_HOME to the jre/bin directory. Try making sure that the PATH environment variable includes the jre/bin directory. For example, type java from the command prompt, does that work? – Jeremy Jun 22 '12 at 17:50
  • When I type Java in command prompt it seems to work, tells me the usage – Philip Kirkbride Jun 22 '12 at 17:56
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    Can you update your answer with the output from typing 'set' at the command prompt? – Jeremy Jun 22 '12 at 17:58
  • @Jeremy I ran 'set' and added to question. – Philip Kirkbride Jun 22 '12 at 18:10
  • Your screen shot does not show that you added the correct directory I suggested to your PATH. – Jeremy Jun 22 '12 at 18:15
  • @Jeremy I updated my files and ran set again and replaced the image in question. Is that right? – Philip Kirkbride Jun 22 '12 at 18:20
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  1. Set the JAVA_HOME Variable

    Windows 7 – Right click My Computer and select Properties > Advanced

    Windows 8 – Go to Control Panel > System > Advanced System Settings

    Windows 10 – Search for Environment Variables then select Edit the system environment variables

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  1. Click the Environment Variables button.

  2. Under System Variables, click New.

  3. In the Variable Name field, enter either:

    JAVA_HOME if you installed the JDK (Java Development Kit)

    or

    JRE_HOME if you installed the JRE (Java Runtime Environment). In the Variable Value field, enter your JDK or JRE installation path .

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  1. Open Command Prompt as Administrator.

  2. Set the value of the Environment variable to your JDK (or JRE) installation path as follows:

    setx -m JAVA_HOME "C:\path_to_Java\jdk_version"

Taras Melnyk
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5

As many have mentioned I had to add...

C:\Program Files\Java\jdk_version\bin

...to the path variable.

However what was not mentioned and was stopping this from working was that I had to make sure java\bin directory is in the path statement before the windows\system32 directory, otherwise this will not work.

I was able to find the information here.

Community
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Philip Kirkbride
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1

2 errors:

  • You are missing the bin folder. Usually the correct path is C:\Program Files\Java\jdk_version\bin

  • JAVA_HOME is usually used by some script or program, if you are interested on running java tools from cmd you have to add that directory to PATH

user827992
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