Unable to locate tools.jar [duplicate]

Question

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Unable to locate tools.jar

I'm trying to use ant to compile using this command :

 ant compile

I don't know if the problem comes from my windows 64bit, or by something else. Because I have java Installed in the 64 & 32 prog files.

I downloaded apache-ant-1.8.2-bin and putted it in C:\Program Files\apache-ant-1.8.2

I tried to put ant everywhere, I switched also the ENV PATH between java 64 and 32 but everytime I get this error message :

Unable to locate tools.jar. Expected to find it in C:\Program Files\Java\jre6\lib\tools.jar

I searched for tools.jar in the ant lib folder, in the java 64 and 32, but no trace of it in the system.

What do you think ?

Junie

Answer 1

A JRE doesn't have a tools.jar, you need a JDK. Set your JAVA_HOME and PATH variables so that they point to a JDK, not a JRE.

Pitiful

Adding "C:\Program Files\Java\jdk1.7.0_65" to JAVA_HOME and "C:\Program Files\Java\jdk1.7.0_65\bin" to PATH did the trick. (jdk1.7.0_65 is for JDK 1.7 Update 65 and can vary) – Abe

@Abe actually, it's more elegant to add %JAVA_HOME%/bin to path. that way you need to change only one variable when you upgrade – Pitiful

on Windows try restarting your computer, worked for me after. – Yoshida

Is Windows the only OS where restarting means you lose your currently open Windows? I just restart the cmd console until I see changes propagated there. Unless of course you've elected to be elegant and some rogue script is overriding your JAVA_HOME path so that it's still pointing at the JRE – Pisciform

For me, adding JAVA_HOME in the windows classpath/path did not help - rather i had to create a new environment variable - JAVA_HOME within the eclipse and point it to JDK7 - that worked – Macrocosm

Answer 2

I had similar issue and got solved by doing following ,

1) set JAVA_HOME as C:\Program Files (x86)\Java\jdk1.7.0\

2) ANT_HOME as F:\ant\apache-ant-1.8.4-bin\apache-ant-1.8.4

3) add both to 'path ' in system variables

Savagism

Is there a reason why 1) ends with "\" and 2) doesn't? – Koy

Answer 3

Please make sure that you are pointing to JDK and not a JRE. For example, you should set JAVA_HOME as "C:\Program Files\java\jdk1.6.0_26" and have %JAVA_HOME%\bin in your system path.

Aparejo

In my case the variable CLASSPATH pointing to %JAVA_HOME%\jre\lib was missing, see https://mcmap.net/q/46645/-how-to-set-the-environment-variables-for-java-in-windows – Acquisitive

Answer 4

I had to copy C:\Program Files\Java\jdk1.6.0_26\lib\tools.jar to C:\Program Files\Java\jre6\lib\ext

Thanks anyway.

Junie

You should not do such a thing. A JRE is a JRE and a JDK is a JDK. Don't mix the two, or you'll get strange, non-reproducible behaviour – Pitiful

I have the jdk and jre in my %PATH%. you think I should remove the jre ? – Junie

I would even suggest removing all of Java installs on your dev machine except for single JDK you will be using :) Unless some of existing product installs don't depend on existing JREs. – Playback

Caution: IN SOME CASES YOU MUST REMOVE THE JRE PATH FOR IT TO WORK. – Photoreconnaissance

Answer 5

tools.jar comes with JDK, but what happens in your case it looks for it within /Java/jre6. Change JAVA_HOME env var to one of your JDK home.

Playback