持续更新linux下遇到的问题。

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anil@anil:~$ sudo apt-get install default-jre
[sudo] password for anil:
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 : Depends: default-jre-headless (= 2:1.7-51) but it is not going      to be installed
Depends: openjdk-7-jre (>= 7~u3-2.1.1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

这个是别人的图。但是我在装java的时候是遇到同样的问题了。

解决方案如下:

1.更新apt : sudo apt-get update

2.安装需要的东西 sudo apt-get -f install