rectangularparcel.java

来自「Java程序设计(美) David D. Riley著 机械工业出版社 书籍配套」· Java 代码 · 共 30 行

//Figure 8.4

public class RectangularParcel extends Parcel  {
	private double parcelLength, parcelWidth, parcelHeight;
	private final int weightPerCubicMeter = 677;

	/** post:	parcelLength == len  and  parcelWidth == w 
	 *			and  parcelHeight == h  and  volume==len*w*h  
	 *			and  weight == volume * weightPerCubicMeter
	 *			and  isAirFreight == b  */
	public RectangularParcel(double len, double w, double h, boolean b) {
		super(0, 0, b);
		parcelLength = len;
		parcelWidth = w;
		parcelHeight = h;
		volume = parcelLength * parcelWidth * parcelHeight;
		weight = volume * weightPerCubicMeter;
	}

	public  double  length()  {
		return parcelLength;
	}	
	public  double  width()  {
		return parcelWidth;
	}
	public  double  height()  {
		return parcelHeight;
	}
}