train.java

关于java面向对象系统分析方面的课件

/*
 * s2javaoo.lg.ch03.Train.java
 * 2007-7-23
 * 火车类
 */
package s2javaoo.lg.ch03;

public class Train implements Traffic {

    public double computeCost(double weight, double length) {
        double cost = -1d;
        
        if ( length <= 900d && length > 0d ) {
            cost = weight * length * 250 ; 
        } else if ( length >  900d ) {
            cost = weight * length * 300 ; 
        }
        
        return cost;
    }

}