各位大佬帮忙看看怎么填,往里进

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