我是新手程序员，学习使用面向对象的编程概念（继承和重载构造函数方法）
现在我已经创建（主要是复制）一个代码，它将从用户那里获取 5 个输入并显示一个输出。现在使用方法重载它也可以接受 3 个输入并显示它们相同的输出。
现在如何在 Swing GUI 中实现它。图形用户界面是这样的
用户可以给出所有值，也可以只给出宽度、高度和深度中的一个。
主要代码是
`
class box
{
private double width;
private double height;
private double depth;
box(box ob)
{
width =ob.width;
height=ob.height;
depth =ob.depth;
}
box(double w,double h,double d)
{
width=w;
height=h;
depth=d;
}
box()
{
width=-1;
height=-1;
depth=-1;
}
box(double len)
{
width=height=depth=len;
}
double volume()
{
return width*depth*height;
}
}
class boxweight extends box
{
private double weight;
boxweight(boxweight ob)
{
super(ob);
weight= ob.weight;
}
boxweight(double w,double h,double d,double m)
{
super(w,h,d);
weight=m;
}
boxweight(double len,double m)
{
super(len);
weight=m;
}
boxweight()
{
super();
weight=-1;
}
double weightcal()
{
return (volume()*weight);
}
}
class shipment extends boxweight
{
private double cost;
shipment(shipment ob)
{
super(ob);
cost=ob.cost;
}
shipment(double w,double h,double d,double m,double c)
{
super(w,h,d,m);
cost=c;
}
shipment (double len,double m,double c)
{
super(len,m);
cost=c;
}
shipment()
{
super();
cost=-1;
}
double costcal()
{
return(weightcal()*cost);
}
}
public class Inheritanceallhere {
public static void main(String[] args) {
shipment o1=new shipment(10,20,30,40,50);
shipment o3=new shipment(18.17122,40,50);
double vol;
vol = o1.volume();
System.out.println("Volume of shipment1 is " + vol);
System.out.println("Weight of shipment1 is "+ o1.weightcal());
System.out.println("Shipping cost: $" + o1.costcal());
System.out.println();
vol =o3.volume();
System.out.println("Volume of shipment2 is " + vol);
System.out.println("Weight of shipment2 is "+ o3.weightcal());
System.out.println("Shipping cost: $" + o3.costcal());
}
}
`
现在我想要什么，当我按下计算按钮时，它将采用可用值并为其分配适当的方法
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
double a,b,c,d,e;
firstsubclass o2=new firstsubclass();
a=Double.parseDouble(jTextField1.getText());
b=Double.parseDouble(jTextField2.getText());
c=Double.parseDouble(jTextField4.getText());
d=Double.parseDouble(jTextField5.getText());
e=Double.parseDouble(jTextField6.getText());
shipment o3=new shipment(a,b,c,d,e);
jTextField3.setText(String.valueOf(o3.costcal()));
}
我做了这段代码来获取所有五个输入然后计算。但我不能对三个值做同样的事情（其中任何一个宽度高度或深度字段都可用）。我知道我可以使用一些控制语句来确定哪种方法可以工作，但我想知道 java 中是否有任何动态控制，以便我可以直接执行此操作而无需任何额外代码。
注意：两个代码都在同一个包中