Java构造函数使用多种方法重载

Question

我在课堂上有一个程序任务.我已经理解了重载的基础知识,但我对一点非常困惑.如何仅从我尝试使用的方法输出？那么让我告诉你代码而不是解释.

public class Box {
 private int length, width, height;

 public Box(int length){
  this.length=length;
  System.out.println("Line created with length of" + length + ".");
 }
 public Box(int length, int width){
  this.length = length;
  this.width = width;
  System.out.println("Rectangle created with the length of " + length + " ");
  System.out.println("and the width of " + width + ".");
 }
 public Box(int length, int width, int height){
  this.length=length;
  this.width=width;
  this.height=height;
  System.out.println("Box created with the length of " + length + ", ");
  System.out.println("the width of " + width + ", ");
  System.out.println("and the height of " + height +".");

 }
}


class BoxTest {

 public static void main(String[] args) {
  Box BoxObject1 = new Box(1,0,0);
  Box BoxObject2 = new Box(1,2,0);
  Box BoxObject3 = new Box(1,2,3);



 }

}

好的,那么!如何在BoxTest类中调用仅输出给定的内容.例如,使用Box BoxObject1我想输出"用XX长度创建的线"而不是其余的.对于Box Box Object2,我想输出"长度为XX,宽度为XX的矩形".我不确定接下来要添加什么才能实现.任何帮助将不胜感激.

Answer 1

我猜

  Box BoxObject1 = new Box(1,0,0);
  Box BoxObject2 = new Box(1,2,0);
  Box BoxObject3 = new Box(1,2,3);

本来应该是

  Box BoxObject1 = new Box(1);
  Box BoxObject2 = new Box(1,2);
  Box BoxObject3 = new Box(1,2,3);

此时,所有三个调用都调用第三个构造函数(对于某些参数传递0).