Unable to locate tools.jar_问答_开发者_运维开发者技术经验分享

I am building a project in Java.

I have this error:

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

I have installed a JDK and the folder: C:\Program Files\Java\jre6\lib is in my s开发者_JAVA技巧ystem but the file tools.jar is not there.

Yes, you've downloaded and installed the Java Runtime Environment (JRE) instead of the Java Development Kit (JDK). The latter has the tools.jar, java.exe, javac.exe, etc.

In case this is still an issue for anyone, I have a bit of clarification on the previous answers. I was running into this same issue using ant with only a JDK installed. Although, the JDK installer gave me a directory structure like this:

 Directory of C:\Program Files\Java

05/08/2012  09:43 AM    <DIR>          .
05/08/2012  09:43 AM    <DIR>          ..
05/08/2012  09:46 AM    <DIR>          jdk1.7.0_04
05/08/2012  09:19 AM    <DIR>          jre6
05/08/2012  09:44 AM    <DIR>          jre7
               0 File(s)              0 bytes

and when I ran ant, it complained about not finding tools.jar under the jre7 subdirectory. It wasn't until I set "JAVA_HOME=C:\Program Files\Java\jdk1.7.0_04" that the error went away.

Install the Java SDK.
Add a System Environment Variable called JAVA_HOME with the value of JDK location.
Go to Control Panel\System and Security\System. Advanced System Settings, Environment Variables, System Variables, New... Example:
Variable Name:JAVA_HOME
Variable Value: C:\Program Files\Java\jdk1.7.0_21
Close/reopen your CMD window so that the new variable takes effect before attempting to re-run the ant command.

I had the same problem and copying C:\Program Files\Java\jdk1.6.0_26\lib\tools.jar to C:\Program Files\Java\jre6\lib\ext worked for me

If you have installed JDK 9.0.1 you will also have this problem as the tools.jar has been deprecated. See migration document.

Set your JAVA_HOME environmental variable to point to C:\Program Files\Java\jdk1.7.0_02.

If you are in Linux you can solve this by installing java on the system:

sudo apt-get install openjdk-7-jdk openjdk-7-jre

No, according to your directory structure, you have installed a JRE, not a JDK. There's a difference.

C:\Program Files\Java\jre6\lib
                      ^^^^

It should be something like:

C:\Program Files\Java\jdk1.6.0_24

Don't spend too much time looking for tools.jar. If you get an error like that, don't be upset.

If you already have java JDK 1.5, go to your lib folder, and the tools.jar should be available there. Copy and paste it in your ant bin folder, then try to use the command ant -version.

You should see the expected result.

I had the same issue on a linux machine. I was quite frustrated at first, because I have installed both the JDK and JRE. I am using version 1.6, 1.7 and 1.8 simultaneously, and I have played a lot with the alternatives to have everything set properly.

The problem was quite stupid to solve, yet counter-intuitive. While I was using the correct JDK, I paid attention to the path of the tools jar maven complained about - it was expecting it to be

$JAVA_HOME\..\lib\tools.jar

The $JAVA_HOME variable pointed directly to my jdk folder (/usr/local/java which was also the correct $PATH entry and alternative sym link). It actually searches for the lib folder outside the java directory, because:

$JAVA_HOME\..\lib\tools.jar

will resolve to

/usr/local/lib/tools.jar

and that is not a valid location.

To solve this, the $JAVA_HOME variable should instead point to this location /usr/local/java/jre (assuming the JDK path is /usr/local/java) -- there is actually jre folder inside the JDK installation directory, that comes with each JDK. This new setup will cause maven to look at the JRE directory, that is part of the JDK:

$JAVA_HOME\..\lib\tools

which now resolves to

/usr/local/java/jre/../lib/tools.jar

and finally to

/usr/local/java/lib/tools.jar

which is where the tools.jar really resides.

So, even if you are indeed using the JDK instead of the JRE, the $JAVA_HOME has to point to the JRE. Remember, the OS alternative should still refer to the JDK.

go to your jdk path where you installed your java

For e.g In my PC JDK installed in the following path

"C:\Program Files\Java\jdk1.7.0_17\";

After go to the lib folder e.g "C:\Program Files\Java\jdk1.7.0_17\lib"

in the lib directory there is tool.jar file

Copy this file and past it in the lib forlder of jre7 directory for e.g

"C:\Program Files\Java\jre7\lib"

You may face similar problem on Ubuntu:

Embedded error: tools.jar not found: /usr/lib/jvm/java-7-openjdk-amd64/jre/../lib/tools.jar

The problem is with JAVA_HOME that is not set properly.

So, on Ubuntu 14.04 x64 using Java8:

sudo apt-get install openjdk-8-jdk openjdk-8-jre
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64

As many people mentioned, it looks like you are looking in your JRE instead of the JDK for the tools.jar file.

I would also like to mention that on recent versions of the JDK, there is no more tools.jar file. I downloaded the most recent JDK as of today (JDK version 12) and I could not find any tools.jar. I had to download JDK version 8 (1.8.0) here https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html to get the tools.jar file. I downloaded that version, took the tools.jar file and put it into my recent version's lib folder.

It's worth observing that tools.jar has been removed from the JDK since Java 9. https://docs.oracle.com/javase/9/migrate/toc.htm#JSMIG-GUID-055EA9F4-835E-463F-B9E1-9081B3D9E55D

If people are facing this issue compiling a Java program with JDK 9+, you may need to review the dependencies of your projects.

In my case, I was trying to compile a project using AspectJ and the Maven plugin org.codehaus.mojo:aspectj-maven-plugin:1.11. After searching online, I found an alternative that supports Java 9+: dev.aspectj:aspectj-maven-plugin:1.13.M3.

I had the same problem even after installing Java JDK and set JAVA_HOME to ..\jdk1.6.0_45\bin folder.

Ant is still trying to find tools.jar in C:\Program Files\Java\jre6\lib folder.
I've fixed it by adding JAVACMD environment variable and set path for it to java.exe in the jdk folder.
In my case it was C:\Program Files\Java\jdk1.6.0_45\bin\java.exe

it has been solved with me in windows os by setting the JAVA_HOME variable before running as follows:

set JAVA_HOME=C:\Program Files\Java\jdk1.8.0_111

Make sure that both the %JAVA_HOME% and %JAVA_HOME%/bin paths are added to your PATH variable.

All the answers about copying tools.jar into the correct position is a poor idea at best.

Make sure that your IDE can find these jars the way it was designed and intended for.

In eclipse window> preferences>Java> Installed JRE, I pointed the directory to the jre directory in the jdk 1.7 and i worked file for me e.g C:\Program Files\Java\jdk1.7.0_71\jre

I had my JDK_path (C:\Program Files\Java\jdk1.7.0_79) in my JAVA_HOME and also the JDK_path\bin in my PATH. But, still my ant was using the JRE instead of JDK.

The issue was I had C:\ProgramData\Oracle\Java\javapathbefore my JDK_path in PATH variable. I simply moved my JDK_path before the oracle one and the issue solved.

solving this problem I have simply copied the tools.jar file from C:\Program Files\Java\jre1.8.0_112\lib to C:\Program Files\Java\jdk1.8.0_112\lib so that I have two tools.jar files instead of one and problem disappeared.

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

if you have installed jdk then

..Java/jdkx.x.x

folder must exist there so in stall it and give full path like

C:\Program Files\Java\jdk1.6.0\lib\tools.jar

Make sure that your classpath is set correctly and pointing to the correct version of the JDK that you have installed. Also, are you using Open JDK? I have had this issue before after I tried to move from open JDK to Suns JDK. This is an example of how that issue could be fixed.

maven-compiler-plugin use jdk ,not jre, tools.jar is in C:\Program Files\Java\jdk1.6.0\lib\tools.jar you must config project JRE System Libary with jdk,not jar. This is the simplest solution.

Right click on your ant file
Go to "Run as" then click on "Ant Build..."
Go to the "JRE" tab
Select a JDK and not a JRE

For me what's working: I downloaded an old version of Java 1.7

I actually set my JAVA_HOME from C:/program files X86/Java BUT after I installed the 1.7 version I had another Java in program files/Java. And at this moment I found the tools.jar here. Then I changed for this new path and it's working

I was also facing the same error. This was removed after setting Java_Home path to C:\Program Files\Java\jdk1.8.0_121. Please ensure bin is not included in the path and no slash is there after jdk1.8.0_121 after you have defined %JAVA_HOME%\bin in the system path variable.

If you're in a RHEL environment the package name containing tools.jar would end with "openjdk-devel".

This is the solution for Windows: in Computer > Advanced system settings > Advanced > Environment variables..., add this in System variables:

Unable to locate tools.jar

I have downloaded tools.jar and after that I copied it into path in error message.

C:\Program Files\Java\jdk-11.0.1\bin > paste here tools.jar

After that I have restarted Spring Tool Suit 4 and everything was working. When I was trying to fix that problem I have made new environmental variable: Control Panel / System / Advenced / Environmental variables / new Name : JAVA_HOME Value: C:\Program Files\Java\jdk-11.0.1 But I do not know is it necessary.

maybe you have updated the JREs in the OS, and the addition has added in the "path" of the environment variables an entry ".../Oracle/jer" that overwrites your JAVA_HOME. try to remove it from the "path" by leaving JAVA_HOME.