adobe flash player does not avaliable in deibian 8.1.0 AMD64

[zhangteng]

I try to install adobe flash player in debian 8.1.0 AMD64, but
it occurs some problem , this is my output :
        root@zhangteng:~# apt-get install flashplugin-nonfree
正在读取软件包列表... 完成
正在分析软件包的依赖关系树       
正在读取状态信息... 完成       
Package flashplugin-nonfree 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 'flashplugin-nonfree' has no installation candidate

Could anyone give me some advice ?