我正在使用此处的说明在 Ubuntu 12.10 上安装 Grails ，但在第 3 步时出现错误，如下所述。
- sudo add-apt-repository ppa:groovy-dev/grails
- sudo apt-get 更新
- sudo apt-get install grails-ppa
我得到的错误如下所示。我安装了 Sun JDK，并设置了JAVA_HOME，并且JAVA_HOME/bin在路径上。
有人可以建议一些事情来解决这个问题吗？
/home/edgecase> $ sudo apt-get install grails-ppa
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
default-jre-headless:i386 : Depends: openjdk-7-jre-headless:i386 (>= 7~u3-2.1) but it is not going to be installed
openjdk-7-jre:i386 : Depends: openjdk-7-jre-headless:i386 (= 7u7-2.3.2a-1ubuntu1) but it is not going to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
/home/edgecase> $ java -version
java version "1.6.0_39"
Java(TM) SE Runtime Environment (build 1.6.0_39-b04)
Java HotSpot(TM) 64-Bit Server VM (build 20.14-b01, mixed mode)