Well, tried looking to better paint methods (ExperienceTracker api), and I'm not the best @ scripting and Java but I'm positive I did this right...
I've already defined ExperienceTracker as: (Don't criticize my naming)
ExperienceTracker xpTrack= new ExperienceTracker();
So in my onStart method, I have this:
xpTrack.start(Skill.MINING);
Then my paint, as well, these don't even show up:
g.drawString("Experience: " + xpTrack.getGainedXP(Skill.MINING) + " (" + xpTrack.getGainedXPPerHour(Skill.MINING) + ")", 15, 101);
g.drawString("Level: " + this.beginningLevel + " (" + xpTrack.getGainedLevels(Skill.MINING) + ")", 15, 115);
And I wasn't getting any errors... but the log for when I started the script:
[INFO][Bot #1][08/13 07:31:44 PM]: Thanks for using WWFMiner!
[INFO][Bot #1][08/13 07:31:44 PM]: Error in script onExit(): WWFMiner
[INFO][Bot #1][08/13 07:31:44 PM]: Script WWFMiner has exited!