安装失败

[mengyyy]

---> Running in 0e01abe91978
Reading package lists...
Building dependency tree...
Package openjdk-7-jre is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'openjdk-7-jre' has no installation candidate
Removing intermediate container 0e01abe91978
The command '/bin/sh -c apt-get install openjdk-7-jre -y' returned a non-zero code: 100