定义部件（Component）的重量（wight）概念，则其重量为本身重量加各子部件的重量之和，getWeight函数计算Component的重量，完成填空
public class Component {
private List <Component> children;
private int weight;
private int getWeight(){
int result = _________;
if(children != null){
for (Component child : children){
if(child != null){
result += ______________;
}
}
}
return result;
}
}
(1). 0
(2). weight