Ant error when trying to build file can t find tools jar

Question

When I run ant it says   Unable to locate tools jar  Expected to find it in C  Program Files Java jre6 lib tools jar Buildfile  build xml does not exist  Build failed   What package can I use to download the file required   C  Program Files Java jre6 lib tools jar  I just downloaded this one      jre-6u19-windows-i586-s exe   but unfortunately it appears that it was not on it

User · Answer

Using suggestions from answers on this page and this other one (ANT_HOME is set incorrectly or ant could not be located), the ultimate fix was the following:

Adding a ANT_HOME environment variable that points to the ROOT directory of your Apache ant directory location. (Not the bin sub-dir!)
Adding a JAVA_HOME environment variable that points to the ROOT directory of your Java JDK (or SDK) directory location. (NOT your JRE and not the bin sub-dir!)
Appended %ANT_HOME%\bin;%JAVA_HOME%\bin to the PATH environment variable.
Make sure you close any command window(s) that were open prior to the changes above. Only command windows opened after the changes will have the updated environment variables.

User · Answer

I was having the same problem  none of the posted solutions helped   Finally  I figured out what I was doing wrong   When I installed the Java JDK it asked me for a directiy where I wanted to install   I changed the directory to where I wanted the code to go   It then asked for a directory where it could install the Runtime Environment and I selected the SAME DIRECTORY where I installed the JDK   It over wrote my lib folder and erased the tools jar   Be sure to use different folders during the install   I used my custom folder for the JDK and the default folder for the RE and everything worked fine

User · Answer

Java ships in 2 versions  JRE  amp  SDK  used to be called JDK   The JRE in addition to not containing the compiler  also doesn t contain all of the libraries available in the JDK  tools jar is one of them   When you download Java at  http   java sun com javase downloads index jsp  make sure to select the JDK version and install it  If you have both a JDK  amp  JRE  make sure that ANT is using the JDK  you can check JAVA HOME  environment variable   and on the commandline if you do  javac -version  you should get a version description

User · Answer

I was also getting the same problem  but i uninstalled all updates of java and now it is working very fine

User · Answer

Just set your java home property with java home  eg C  Program Files Java jdk1 7 0 25  directory  Close command prompt and reopen it  Then error relating to tools jar will be solved  For the second one  build xml not found    you should have to ensure your command line also at the directory where your build xml file resides

User · Answer

You need JDK for that   Set JAVA HOME to point to the JDK

User · Answer

I found that even though my path is set to JDK  the ant wants the tools jar from jre folder  So just copy paste the tools jar folder from JDK to jre

User · Answer

Sometimes while installing JDK  you may get a dll is missing error  Because of this  it won t copy the tools jar file to the java folder   So please reinstall the JDK in a different location and if it is successful then you will see the tools jar file

[java] Ant error when trying to build file, can't find tools.jar?

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