Thanks to @Jack for sparking the idea

 

Variables:

int currentXP;
int gainedXP;
int drawXP;
int screenWidth = 520;
int screenHeight = 337;
double yMovement;
int alpha = 255; 

In your onStart method:

currentXP = client.getSkills().getExperience(Skill.YOUR_SKILL);

Code for your onPaint method:

gainedXP = client.getSkills().getExperience(Skill.YOUR_SKILL);

if (gainedXP != currentXP) {
    drawXP = gainedXP - currentXP;
    currentXP = client.getSkills().getExperience(Skill.YOUR_SKILL);
    yMovement = 0;
    alpha = 255;
}
if (drawXP != 0 && alpha > 1) {
    g.setColor(new Color(255, 255, 255, alpha -= 2));
    String drawString = "+ " + drawXP;
    int stringLength = (int) g.getFontMetrics().getStringBounds(drawString, g).getWidth();
    g.drawString(drawString, screenWidth / 2 - stringLength / 2, (int) ((screenHeight / 2) - (yMovement += .7)));
}

If you're drawing other things after this remember to set the color back to what you want!! Here's what it looks like in game:

Edited January 24, 201412 yr by Swizzbeat

nice, I hope i helped

Looks like a useful add-on. :P

nice, I hope i helped

I forget what it is you said but it sparked something, so yes you did help and I thank you  added you to OP as well

Edited January 24, 201412 yr by Swizzbeat

This is sick, good work Swizzbeat.