[CentOS] Yum java-devel not listed installed

[david]

>
>
>On 10/02/2017 06:24 PM, david wrote:
> > Folks
> >
> > I performed an install of "java-devel".  Several packages got
> > installed.  So far so good.
> >
> > Yet, when I performed
> > Â  yum list installed | grep java-devel
> > and also
> > Â  yum rpm -qa | grep java-devel
> >
> > it did not show up as already installed.
> >
> > This behavior appears both on Centos7 and Centos6.  This bothers me
> > because as a time-saving effort, I maintain the last output of "yum list
> > installed" and quickly determine whether it's worth running yum.  True,
> > yum would "do nothing", but that takes several seconds.
> >
> > Is there some simple explanation?  It works for all the other packages
> > I've installed.
>
>
>There is a java-1.7.0-openjdk-devel or java-1.7.0-openjdk-devel, but no
>java-devel

True, but then how does "yum install java-devel" 
know what to install without a package by that 
name?  I thought that the "yum install" command took package (or group) names.

And sorry about the error in my rpm command; I 
meant it without the "yum" in front of it.
David