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ºÜÃ÷ÏÔÕâô×öÓкܶà´úÂëÖØ¸´£¬¶øÇÒЧÂÊÌ«µÍ£®ÄÇôΪʲô²»¹¹ÔìÒ»¸öÔËÊ乤¾ßµÄ¸¸Àà:
public class Conveyance{
protected weight;
protected space;
public abstract Double cost(Double weight,Double space);
}
È»ºó×ÓÀàTruck,Plane,Train·Ö±ðʵÏÖcost·½·¨
ÔÙ¹¹ÔìÒ»¸ö¹¤³§ÀàΪ¿Í»§ÖÆÔì×ÓÀàʵÀý
public class ConveyanceFactory{
public static Conveyance getConveyance(String which){
if(which.equils("Truck")){return new Truck();}
else if(which.equils("Train")){return new Train();}
else if(which.equils("Plane")){return new Plane();}
else{return null;}
}
}
·þÎñ³ÌÐòµÄ·½·¨ÊµÏÖ£º
public double transportCost(String type,Double weight,Double space){
Conveyance c;Double cost;
c = ConveyanceFactory.getConveyance("type");
cost = c.cost(weight,space);
return cost;
}
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