Unable to locate tools jar when running ant

Question

When running ant  I get the following message   Unable to locate tools jar  Expected to find it in C  Program Files Java jre6 lib tools jar  I have JAVA HOME set to C  Program Files Java jdk1 7 0 02  PATH includes C  Program Files  x86  Java jdk1 7 0 02 bin  CLASSPATH includes C  Program Files  x86  Java jdk1 7 0 02  and ANT HOME is set to C  ant   It seems that ant is ignoring all of these settings and looking for the tools jar somewhere else   There are no environment variables which point to the jre6 path   Any ideas why

User · Answer

There are two directories that looks like JDK.

  C:\Program Files\Java\jdk1.7.0_02
  C:\Program Files (x86)\Java\jdk1.7.0_02\

This may be due to both 64 bit and 32 bit JDK installed? What ever may be the case, the java.exe seen by ant.bat should from the JDK. If the JRE's java.exe comes first in the path, that will be used to guess the JDK location.

Put 'C:\Program Files (x86)\Java\jdk1.7.0_02\bin' or 'C:\Program Files\Java\jdk1.7.0_02' as the first argument in the path.

Further steps:

You can take output of ant -diagnostics and look for interesting keys. (assuming Sun/Oracle JDK).

 java.class.path 
 java.library.path
 sun.boot.library.path

(in my case tools.jar appears in java.class.path)

User · Answer

I was also having the same problem So I just removed the JDK path from the end and put it in start even before all System or Windows 32 paths   Before it was like this      C  Windows system32 C  Windows C  Windows System32 Wbem C  Windows System32 WindowsPowerShell v1 0  C  Program Files Microsoft SQL Server 100 Tools Binn  C  Program Files Microsoft SQL Server 100 DTS Binn  C  Program Files Microsoft SQL Server 100 Tools Binn VSShell Common7 IDE  C  Users Rajkaran AppData Local Smartbar Application  C  Users Rajkaran AppData Local Smartbar Application  C  Program Files doxygen bin  JAVA HOME  bin  ANT HOME  bin   So I made it like this       JAVA HOME  bin C  Windows system32 C  Windows C  Windows System32 Wbem C  Windows System32 WindowsPowerShell v1 0  C  Program Files Microsoft SQL Server 100 Tools Binn  C  Program Files Microsoft SQL Server 100 DTS Binn  C  Program Files Microsoft SQL Server 100 Tools Binn VSShell Common7 IDE  C  Users Rajkaran AppData Local Smartbar Application  C  Users Rajkaran AppData Local Smartbar Application  C  Program Files doxygen bin  ANT HOME  bin

User · Answer

The order of items in the PATH matters  If there are multiple entries for various java installations  the first one in your PATH will be used    I have had similar issues after installing a product  like Oracle  that puts it s JRE at the beginning of the PATH   Ensure that the JDK you want to be loaded is the first entry in your PATH  or at least that it appears before C  Program Files Java jre6 bin appears

User · Answer

Make sure you use the root folder of the JDK   Don t add   lib  to the end of the path  where tools jar is physically located   It took me an hour to figure that one out   Also  this post will help show you where Ant is looking for tools jar   Why does ANT tell me that JAVA HOME is wrong when it is not

User · Answer

Try to check it once more according to this tutorial  http   vietpad sourceforge net javaonwindows html Try to reboot your system   If nothing  try to run  cmd  and type there  java   does it print anything

[java] "Unable to locate tools.jar" when running ant

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