Maven build failed: “Unable to locate the Javac Compiler in: jre or jdk issue”

Question

I have my JAVA_HOME set to:

C:\\Program Files (x86)\\Java\\jdk1.6.0_18

After I run maven ins

Answer 1

I have just installed Maven 3.0.4, set M2_HOME, M2 and JAVA_HOME accordingly. I then ran the following commands:

mvn archetype:generate....

mvn compile

I got failed message such as: maven unable to locate javac compiler.

On my computer, I have by default JRE installed at C:\program files\java\jre.1.6. And I have the other C:\java\jdk1.6 and JAVA_HOME set to this C:\java\jdk1.6.

I didn't see anything wrong with my setting. After searching, I decided to look into mvn.bat, I echoed %JAVA_HOME% every step and it displayed correctly as C:\java\jdk1.6, but when I run the command mvn --version, it displayed Java home: C:\program files\java\jre1.1.6.

Finally, I found out that I just need to set -Djava.home=c:\java\jdk1.6 as in the command below, and working fine now:

%MAVEN_JAVA_EXE% %MAVEN_OPTS% -classpath %CLASSWORLDS_JAR% "-Dclassworlds.conf=%M2_HOME%\bin\m2.conf" "-Djava.home=%JAVA_HOME%" "-Dmaven.home=%M2_HOME%" %CLASSWORLDS_LAUNCHER% %MAVEN_CMD_LINE_ARGS%

Note: This is for mvn on the command line and not with Eclipse.