chance.java

public Object getRandom(HashMap<Object, Integer> chanceMap) {
	int chancey = 0;
	for (int c : chanceMap.values()) {
		chancey += c;
	}
	int index = myRandom.nextInt(chancey);
	
	Object o = null;
	for (Entry<Object, Integer> e : chanceMap.entrySet()) {
		index -= e.value();
		if (index <= 0) {
			o = e.key();
			break;
		}
	}
	return o;
}