truck.java

关于java面向对象系统分析方面的课件

/*
 * s2javaoo.lg.ch03.Truck.java
 * 2007-7-23
 * 卡车类
 */
package s2javaoo.lg.ch03;

public class Truck implements Traffic {
    
    public double computeCost(double weight, double length) {
        double cost = -1d;
        
        if ( length > 1000d || weight > 60d ) {
            return -1d;
        } else if ( length > 0d ) {
            cost = weight * length * 120 ; 
        }
        
        return cost;
    }

}