DWM

Errors are normal for Arch Linux users, that’s everyday food, we will always learn new things, read some documentation, read write-ups, compile some configurations, understand the structure, learn some programming languages, and so on. These are all good things for us because with Arch Linux, we will always be learning, and always want to know about everything.

in this case, (Java) can be seen in this documentation article.

If there are empty gaps of desktop space outside terminal windows, it is likely due to the terminal’s font size. Either adjust the size until finding the ideal scale that closes the gap, or toggle resizehints to 0 in config.h.

This will cause dwm to ignore resize requests from all client windows, not just terminals. The downside to this workaround is that some terminals may suffer redraw anomalies, such as ghost lines and premature line wraps, among others.