/*
* Flooring.java
*
*/
class Flooring {
private static final double limit = 0.02; // limit for one more width
private String name; // for identification purposes
private double price; // price per meter
private double widthOfFlooring; // meter
public Flooring(String initName, double initPrice, double initWidth) {
name = initName;
price = initPrice;
widthOfFlooring = initWidth;
}
public String getName() {
return name;
}
public double getPricePerM() {
return price;
}
public double getWidth() {
return widthOfFlooring;
}
/*
* We are going to calculate the amount which is needed to cover one surface.
* The flooring is always placed crosswise relative to the length of the surface.
* If you want to find the amount the other way, you have to change
* width and length in the surface argument.
*/
public double getNoOfMeters(Surface aSurface) {
double lengthSurface = aSurface.getLength();
double widthSurface = aSurface.getWidth();
int noOfWidths = (int)(lengthSurface / widthOfFlooring);
double rest = lengthSurface % widthOfFlooring;
if (rest ＞= limit) noOfWidths++;
return noOfWidths * widthSurface;
}
public double getTotalPrice(Surface aSurface) {
return getNoOfMeters(aSurface) * price;
}
}
以上三个类之间的类图关系可以表示为如下图：
以下我们来详细分析类FlooringClient是如何发送消息给其它类，而实现方法的调用过程。并如何用UML序列图来描述这一序列过程。
