# "Unable to locate the Javac Compiler" when building with Eclipse **URL:** \ **Category:** Development\ **Tags:** java, eclipse\ **Created:** [July 16, 2015, 5:24am UTC](https://talk.openmrs.org/t/unable-to-locate-the-javac-compiler-when-building-with-eclipse/2484 "2015-07-16T05:24:38Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![psin0609](https://talk.openmrs.org/letter_avatar/psin0609/32/5_5575768a8748004e209b776fc1b2916d.png) [@psin0609](https://talk.openmrs.org/u/psin0609)\ **Post date:** [July 16, 2015, 5:24am UTC](https://talk.openmrs.org/t/unable-to-locate-the-javac-compiler-when-building-with-eclipse/2484/1 "2015-07-16T05:24:38Z")
``` [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Reactor Build Order: [INFO] [INFO] OpenMRS [INFO] openmrs-tools [INFO] openmrs-test [INFO] openmrs-api [INFO] openmrs-web [INFO] openmrs-webapp [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building OpenMRS 1.12.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ openmrs --- [INFO] [INFO] --- buildnumber-maven-plugin:1.1:create (default) @ openmrs --- [INFO] Checking for local modifications: skipped. [INFO] Updating project files from SCM: skipped. [INFO] ShortRevision tag detected. The value is '6'. [INFO] Executing: cmd.exe /X /C "git rev-parse --verify --short=6 HEAD" [INFO] Working directory: D:\openmrs-core\openmrs-core-master [INFO] Storing buildNumber: 0 at timestamp: 1436978170908 [INFO] ShortRevision tag detected. The value is '6'. [INFO] Executing: cmd.exe /X /C "git rev-parse --verify --short=6 HEAD" [INFO] Working directory: D:\openmrs-core\openmrs-core-master [INFO] Storing buildScmBranch: UNKNOWN_BRANCH [INFO] [INFO] --- build-helper-maven-plugin:1.5:parse-version (parse-version) @ openmrs --- [INFO] [INFO] --- maven-jar-plugin:2.3.2:test-jar (default) @ openmrs --- [WARNING] JAR will be empty - no content was marked for inclusion! [INFO] Building jar: D:\openmrs-core\openmrs-core-master\target\openmrs-1.12.0-SNAPSHOT-tests.jar [INFO] [INFO] --- license-maven-plugin:2.6:check (default) @ openmrs --- [INFO] Checking licenses... [INFO] [INFO] --- maven-install-plugin:2.4:install (default-install) @ openmrs --- [INFO] Installing D:\openmrs-core\openmrs-core-master\pom.xml to C:\Users\Piyush\.m2\repository\org\openmrs\openmrs\1.12.0-SNAPSHOT\openmrs-1.12.0-SNAPSHOT.pom [INFO] Installing D:\openmrs-core\openmrs-core-master\target\openmrs-1.12.0-SNAPSHOT-tests.jar to C:\Users\Piyush\.m2\repository\org\openmrs\openmrs\1.12.0-SNAPSHOT\openmrs-1.12.0-SNAPSHOT-tests.jar [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building openmrs-tools 1.12.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ openmrs-tools --- [INFO] Deleting D:\openmrs-core\openmrs-core-master\tools\target [INFO] [INFO] --- buildnumber-maven-plugin:1.1:create (default) @ openmrs-tools --- [INFO] [INFO] --- build-helper-maven-plugin:1.5:parse-version (parse-version) @ openmrs-tools --- [INFO] [INFO] --- maven-resources-plugin:2.4:resources (default-resources) @ openmrs-tools --- [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] Copying 7 resources [INFO] [INFO] --- maven-compiler-plugin:2.1:compile (default-compile) @ openmrs-tools --- [INFO] Compiling 1 source file to D:\openmrs-core\openmrs-core-master\tools\target\classes [INFO] ------------------------------------------------------------- [ERROR] COMPILATION ERROR : [INFO] ------------------------------------------------------------- [ERROR] Unable to locate the Javac Compiler in: C:\Program Files\Java\jre7\..\lib\tools.jar Please ensure you are using JDK 1.4 or above and not a JRE (the com.sun.tools.javac.Main class is required). In most cases you can change the location of your Java installation by setting the JAVA_HOME environment variable. [INFO] 1error [INFO] ------------------------------------------------------------- [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] OpenMRS ............................................ SUCCESS [2.541 s] [INFO] openmrs-tools ...................................... FAILURE [0.422 s] [INFO] openmrs-test ....................................... SKIPPED [INFO] openmrs-api ........................................ SKIPPED [INFO] openmrs-web ........................................ SKIPPED [INFO] openmrs-webapp ..................................... SKIPPED [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.312 s [INFO] Finished at: 2015-07-15T22:06:12+05:30 [INFO] Final Memory: 19M/355M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.1:compile (default-compile) on project openmrs-tools: Compilation failure [ERROR] Unable to locate the Javac Compiler in: [ERROR] C:\Program Files\Java\jre7\..\lib\tools.jar [ERROR] Please ensure you are using JDK 1.4 or above and [ERROR] not a JRE (the com.sun.tools.javac.Main class is required). [ERROR] In most cases you can change the location of your Java [ERROR] installation by setting the JAVA_HOME environment variable. [ERROR] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException [ERROR] [ERROR] After correcting the problems, you can resume the build with the command [ERROR] mvn -rf :openmrs-tools ``` any one familiar to these errors please respond…! ---
**Author:** ![k.joseph](https://talk.openmrs.org/user_avatar/talk.openmrs.org/k.joseph/32/8097_2.png) [@k.joseph](https://talk.openmrs.org/u/k.joseph)\ **Post date:** [July 16, 2015, 5:35am UTC](https://talk.openmrs.org/t/unable-to-locate-the-javac-compiler-when-building-with-eclipse/2484/2 "2015-07-16T05:35:59Z")
> [@psin0609](#): > > [ERROR] Unable to locate the Javac Compiler in: Looks like your java is not set up well. You need to set up JAVA\_HOME and add the java compiler to your PATH after installing java jdk. I see you instead have jre under C:\Program Files\Java which most jdk packages install anyway. See: > ---
**Author:** ![psin0609](https://talk.openmrs.org/letter_avatar/psin0609/32/5_5575768a8748004e209b776fc1b2916d.png) [@psin0609](https://talk.openmrs.org/u/psin0609)\ **Post date:** [July 16, 2015, 8:57am UTC](https://talk.openmrs.org/t/unable-to-locate-the-javac-compiler-when-building-with-eclipse/2484/3 "2015-07-16T08:57:06Z")
after configuring the build path and building the project again i am getting this error ``` [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.1:compile (default-compile) on project openmrs-tools: Compilation failure [ERROR] Failure executing javac, but could not parse the error: [ERROR] javac: invalid target release: 1.8 [ERROR] Usage: javac [ERROR] use -help for a list of possible options [ERROR] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException [ERROR] [ERROR] After correcting the problems, you can resume the build with the command [ERROR] mvn -rf :openmrs-tools ``` ---
**Author:** ![pascal](https://talk.openmrs.org/letter_avatar/pascal/32/5_5575768a8748004e209b776fc1b2916d.png) [@pascal](https://talk.openmrs.org/u/pascal)\ **Post date:** [July 16, 2015, 9:07am UTC](https://talk.openmrs.org/t/unable-to-locate-the-javac-compiler-when-building-with-eclipse/2484/4 "2015-07-16T09:07:23Z")
If you’re trying to build master, then you need Java 8. > [@psin0609](#): > > javac: invalid target release: 1.8 This message implies you’re using a Java version \< 8. ---
**Author:** ![psin0609](https://talk.openmrs.org/letter_avatar/psin0609/32/5_5575768a8748004e209b776fc1b2916d.png) [@psin0609](https://talk.openmrs.org/u/psin0609)\ **Post date:** [July 16, 2015, 1:52pm UTC](https://talk.openmrs.org/t/unable-to-locate-the-javac-compiler-when-building-with-eclipse/2484/5 "2015-07-16T13:52:13Z")
problem solved. and now i am using it. thanks pascal and k\_joseph