Maven和Java_Home

Question

I am using Netbeans 7.4. I down loaded the Maven3.1 and extracted in C:\\Apache\\apache-maven-3.1.1. System Variables are set as :

JAVA_HOME is set at C:\\Program Files\\Java\\jdk1.7.0_45 M2_HOME is set to C:\\Apache\\apache-maven-3.1.1

Path is set to C:\\Program Files (x86)\\NVIDIA Corporation\\PhysX\\Common;C:\\Program Files\\Common Files\\Microsoft Shared\\Windows Live;C:\\Program Files (x86)\\Common Files\\Microsoft Shared\\Windows Live;%SystemRoot%\\system32;%SystemRoot%;%SystemRoot%\\System32\\Wbem;%SYSTEMROOT%\\System32\\WindowsPowerShell\\v1.0\\;C:\\Program Files (x86)\\Windows Live\\Shared;C:\\Program Files (x86)\\QuickTime\\QTSystem\\;C:\\Program Files\\Java\\jdk1.7.0_45\\bin;%M2_HOME%\\bin

Now when from the command line I command ..>mvn -v I get this this error:

ERROR: JAVA_HOME is set to an invalid directory. JAVA_HOME = "C:\\Program Files\\Java\\jdk1.7.0_45;" Please set the JAVA_HOME variable in your environment to match the location of your Java installation

Answer 1

Actually you need to create

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system variable like this:
JAVA_HOME = C:\Program Files\Java\jdk1.7.0_45
CLASS_PATH = C:\Program Files\Java\jdk1.7.0_45\bin\lib

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User variable
ME = C:\Program Files\apache-maven-3.1.1\bin
M2_HOME = C:\Program Files\apache-maven-3.1.1
MAVEN_OPTS = -Xms256m -Xmx512m

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Path - insert into your path
C:\Program Files\apache-maven-3.1.1\bin

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Don't forget to reboot system

Answer 2

Read the error message carefully. It says:

... JAVA_HOME = "C:\Program Files\Java\jdk1.7.0_45;" ...

See the stray semicolon? Get rid of it!

The JAVA_HOME variable should contain a directory name ... not a "search path". What you are telling Maven to do is to use a directory whose name contains a semicolon. That directory doesn't exist.

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Meta-advice: it pays to read error messages carefully.

Answer 3

I faced the similar situation. I resolved it by removing the semicolon(;) at the end of JAVA_HOME .

JAVA_HOME = C:\Program Files\Java\jdk1.7.0_11

Instead of

JAVA_HOME = "C:\Program Files\Java\jdk1.7.0_11;"

Answer 4

Java\\jdk* is the installation directory of the development kit. Find a "jre" folder inside Program Files\\Java. That "JRE" folder should be your JAVA_HOME

Answer 5

该值JAVA_HOME 不应该包含引号，因为有几个Maven插件将追加类似“本\\的javac.exe”，如果行情仍然存在，这将使无效的路径。