Gradle does not find tools jar

Question

I am using javadoc doclets with gradle  so I need to use the package tools jar  which is in the lib folder from the jdk  1 6 0 26 in my case    The point is that gradle does not take it automatically  so I was adding that tools package to my libs folder  and then adding it to dependencies gradle     Now I want to take it directly from my JDK home into my dependencies gradle  Is there a way to do that  I have tried the next in my dependencies gradle   compile files    System properties  java home    lib tools jar     But it does not find it while compiling

User · Answer

For me this error ocurred after trying to use audioplayers flutter library. To solve i got tools.jar of the folder:

C:\Program Files\Android\Android Studio\jre\lib

and pasted on

C:\Program Files\Java\jre1.8.0_181\lib.

After this the build worked fine.

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Linux  Open  etc environment in any text editor like nano or gedit and add the following line   JAVA HOME   usr lib jvm open-jdk    Windows         Start the System Control Panel applet  Start - Settings - Control Panel - System    Select the Advanced tab   Click the Environment Variables button   Under System Variables  click add button  then past the following lines   in Variable Name   JAVA HOME  in Variable Value    C  Program Files Java jdk1 x x xxx   where x x xxx jdk version you can get your jdk version from here C  Program Files Java Under System Variables  select Path  then click Edit then click new button then past the following line    JAVA HOME  bin

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With Centos 7  I have found that only JDK has tools jar  while JRE has not  I have installed the Java 8 JRE yum install java-1 8 0-openjdk   but not the JDK yum install java-1 8 0-openjdk-devel    Installing the latter solves the problem  Also  remember to set JAVA HOME

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Did you make sure that tools jar made it on the compile class path  Maybe the path is incorrect   task debug  lt  lt        configurations compile each   println it

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I solved problem on this way    download file tools-1 8 0 jar on http   www java2s com Code Jar t Downloadtools180jar htm unzip file and rename to tools jar copy to C  Program Files Java jre1 8 0 191 lib folder Retry

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Like other answers I set org gradle java home property in gradle properties file  But path with   separators did not work  building on windows 10        Java home supplied via  org gradle java home  is invalid  Invalid   directory  C Program FilesJavajdk1 8 0 65   So instead of      org gradle java home C  Program Files Java jdk1 8 0 65   i had to use     org gradle java home C  Program Files Java jdk1 8 0 65   then the build was successful  Problem is that project is build with JRE instead of JDK and since I was building it from eclipse this also worked    In Window Preferences Gradle Arguments specify Workspace JRE and specify your JDK   In Window Preferences Java InstalledJREs specify your JDK as default

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It may be two years too late  but I ran into the same problem recently and this is the solution I ended up with after finding this post   import javax tools ToolProvider  dependencies     compile       files   URLClassLoader  ToolProvider getSystemToolClassLoader    getURLs                     It should work if java home points to a directory that s not under the JDK directory and even on Mac OS where you d have classes jar instead of tools jar

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My solution on Mac  add this line to gradle properties  org gradle java home  Library Java JavaVirtualMachines jdk1 8 0 271 jdk Contents Home  not this one  org gradle java home  Library Internet Plug-Ins JavaAppletPlugin plugin Contents Home  you can open the last home directory and will find that there is no lib tools jar file existence  so change the path to JavaVirtualMachines jdk1 8 0 271 jdk and it works for me  By the way  in the terminal  I echo the  JAVA HOME and it gets the first path  not the second one  I think this is why my Gradle cannot work properly

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If you use terminal to build and you have this error you can point to jdk bundled with android studio in your gradle properties file   org gradle java home  usr local android-studio jre

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I ve tried most of the top options but it seems that I had something wrong with my environment setup so they didn t help  What solved the issue for me was to re-install jdk1 8 0 201 and jre1 8 0 201 and this solved the error for me  Hope that helps someone

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In CentOS7 the development package will install tools jar  The file is not present in java-1 8 0-openjdk  sudo yum install java-1 8 0-openjdk-devel

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This worked for me   I was getting message      Execution failed for task   app compileDebugJavaWithJavac             Could not find tools jar  Please check that C  Program Files Java jre1 8 0 121 contains a valid JDK installation        In Android Studio  check your SDK Location  File  Project Structure  SDK Location  JDK Location  Example  C  android-studio android-studio jre Copy the tools jar file in the C  android-studio android-studio jre lib folder into the C  Program Files Java jre1 8 0 121 lib folder  Retry

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On windows 10  I encounter the same problem and this how I fixed the issue    Access Advance System Settings gt Environment Variables gt System Variables  Select PATH overwrite the default     C  ProgramData Oracle Java javapath  With your own jdk installation that is JAVA HOME C  Program Files Java jdk1 8 0 162

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Adding JDK path through JAVA HOME tab in  Open Gradle Run Configuration  will solve the problem

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I got the same error using Eclipse trying to execute a Gradle Task  Every time I run a command  i e  war  the process threw an exception like       Could not find tools jar  Please check that C  Program Files Java Jre8  is a valid JDK install    I tried the solution listed in this post but none of them solved this issue  Here my solution     Go to the  Gradle Task  view  Right Click on the task you want to execute Select Open Gradle Run Configuration In the tab  Java Home  select your local JDK repository then click OK   Run again  Enjoy

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In my case  Windows 10  after Java update I lost my Enviroment Variables  so I fixed added the variables again  based in the following steps https   confluence atlassian com doc setting-the-java home-variable-in-windows-8895 html

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I had a similar case using Ubuntu  The machine had only the JRE installed  So  I just executed the command below to install the JDK   sudo apt install openjdk-8-jdk

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Found it  System property  java home  is not JAVA HOME environment variable  JAVA HOME points to the JDK  while java home points to the JRE  See that page for more info   Soo    My problem was that my startpoint was the jre folder  C  jdk1 6 0 26 jre  and not the jdk folder  C  jdk1 6 0 26  as I thought tools jar is on the C  jdk1 6 0 26 lib folder    The compile line in dependencies gradle should be   compile files    System properties  java home       lib tools jar

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I just added a gradle properties file with the following content   org gradle java home C   Program Files  Java  jdk1 8 0 45

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I had this problem when I was trying to run commands through CLI    It was a problem with system looking at the JRE folder i e   D  Program Files Java jre8 bin  If we look in there  there is no Tools jar  hence the error    You need to find where the JDK is  in my case  D  Program Files Java jdk1 8 0 11  and if you look in the lib directory  you will see Tools jar   What I did I created a new environment variable JAVA HOME    And then you need to edit your PATH variable to include JAVA HOME  i e    JAVA HOME  bin    Re-open command prompt and should run

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Put in gradle properties file the following code line  org gradle java home C   Program Files  Java  jdk1 8 0 45  Example image

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On my system  Win 10  JRE 1 8 0  Android Studio 3 1 2  Gradle 4 1  there is no tools jar in the JRE directory  C  Program Files Java jre1 8 0 171    However  I found it in C  Program Files Android Android Studio jre lib and tried setting JAVA HOME C  Program Files Android Android Studio jre  That works  for me

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I was struggling as well for this Solution  Found a better way to it with Gradle as described here  We can get the JVM JDK information from Gradle itself   dependencies      runtime files org gradle internal jvm Jvm current   toolsJar      So simple

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Add this to gradle properties      org gradle java home C  Program Files Java jdk1 8 0 91

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What solved it for me was the following   found tools jar in C  Program Files Android Android Studio jre lib copy paste to C  Program Files  x86  Java jre1 8 0 271 lib ran the code again and it worked

[java] Gradle does not find tools.jar

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