如何在Linux的X Window System中找到一个窗口并将其置于最前面？

Question

I have a series of automated user tests of Swing GUI that use Java robot and User32 native library on Windows. With methods like User32.INSTANCE.EnumWindows I am able to find a window with a specific title, bring it to front and then use key-strokes to perform actions. The windows I am looking for are either other Swing Apps (running in separate JVM), PDF viewers or browsers. I have no control of those windows.

Is there a way how to do this on Linux?

My setup (can be changed if it helps, virtual machines will be used anyway):

• Ubuntu 14.04
• tightvnc server with xvnc
• IceWM window manager

Note: I am running these tests on a headless server.

Required operations:

• Find a named window (by title, to confirm something was opened)
• Bring a named window to front and focus on it (to perform keystrokes)

Answer 1

As per Etan's suggestion, I've installed wmctrl:

sudo apt-get install wmctrl

And then called it from Java. For finding a named window:

wmctrl -l <title>

For getting focus:

wmctrl -a <title>

Works well even when partial title is used, therefore I could easily replace the tests written for User32 native library.