public void addMaterials(Class<?> c) {
if (!c.isEnum()) return;
if (!(c.getEnumConstants() instanceof Material[])) return;
Material[] ms = (Material[]) c.getEnumConstants();
for (Material m : ms) {
materials.put(m.getSymbol(), m);
}
}
public void addMaterial(Material m) {
materials.put(m.getSymbol(), m);
}