This page demonstrates the usage of neko-cat Applet class. Heres are all you need to insert in your source code call the class:
jcat j1 = null;
void init() { j1 = new jcat(this); j1.start(); }
public boolean mouseMove(Event evt, int x, int y) { j1.mouseMove(x, y); return true; }
You will need to download all the images files in nekocat directory as well. In this demo page, I have added start and stop buttons and parameters to choose cat sleep time and move step distance and background image.