public boolean addThing(Thing thing) {
if ((thing.getVolume() + this.getVolume()) <= this.maximumCapacity) {
this.things.add(thing);
return true;
}
return false;
}
@Override
public int getVolume() {
int volume = 0;
for (Thing t : this.things) {
volume = volume + t.getVolume();
}
return volume;
}