install rosjava error

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I have troubles installing rosjava_core.

• hg clone https://code.google.com/p/rosjava rosjava_core (this ran fine)
• ./gradlew gives me this error:

Building > :rosjava_actionlib:compileJava > Resolving dependencies ':rosjava_a:rosjava_actionlib:compileJava

FAILURE: Build failed with an exception.

• What went wrong: Could not resolve all dependencies for configuration ':rosjava_actionlib:compile'. > Could not find group:ros, module:message.actionlib_msgs, version:0.0.0-SNAPSHOT. Required by: ros.rosjava_core:rosjava_actionlib:0.0.0-SNAPSHOT

Then I tried this tutorial: http://docs.rosjava.googlecode.com/hg/rosjava_core/html/installing.html

• sudo apt-get install python-setuptools (ran fine)
• easy_install --prefix ~/.local -U rosinstall

error: can't create or remove files in install directory

The following error occurred while trying to add or remove files in the installation directory:

[Errno 2] No such file or directory: '/home/katrijne/.local/lib/python2.7/site-packages/test-easy-install-4763.write-test'

The installation directory you specified (via --install-dir, --prefix, or the distutils default setting) was:

/home/katrijne/.local/lib/python2.7/site-packages

This directory does not currently exist. Please create it and try again, or choose a different installation directory (using the -d or --install-dir option).

• export PATH=$PATH:~/.local/bin
• ... (see the tutorial)
• easy_install --prefix ~/.local -U pygments (gives the same error as the previous easy_install)
• roscd rosjava_core
• ./gradlew install

21:02:09.331 [ERROR] [org.gradle.BuildExceptionReporter] FAILURE: Build failed with an exception. 21:02:09.331 [ERROR] [org.gradle.BuildExceptionReporter] 21:02:09.331 [ERROR] [org.gradle.BuildExceptionReporter] * What went wrong: 21:02:09.332 [ERROR] [org.gradle.BuildExceptionReporter] Execution failed for task ':rosjava_messages:generateSources'. 21:02:09.334 [ERROR] [org.gradle.BuildExceptionReporter] > Command '/usr/lib/jvm/java-6-openjdk/bin/java' finished with (non-zero) exit value 1. 21:02:09.335 [ERROR] [org.gradle.BuildExceptionReporter] 21:02:09.335 [ERROR] [org.gradle.BuildExceptionReporter] * Exception is: 21:02:09.336 [ERROR] [org.gradle.BuildExceptionReporter] org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':rosjava_messages:generateSources'.

Can you help me?