#JSpark
I'm sure people have seen https://github.com/holman/spark - this is a Java port.
Maybe you want ascii sparklines without having to shell out to render them. For example if you're generating text-only reports, or writing an IRC bot.
Code:
JSpark.render(1, 5, 22, 13, 53)
Evaluates to:
"▁▂▄▃█"