plane.java

关于java面向对象系统分析方面的课件

/*
 * s2javaoo.lg.ch03.Plane.java
 * 2007-7-23
 * 飞机类
 */
package s2javaoo.lg.ch03;

public class Plane implements Traffic {

    public double computeCost(double weight, double length) {
        double cost = -1d;
        
        if ( length > 500 ) {
            cost = weight * length * 750 ; 
        } else {
            return -1d;
        }

        return cost;
    }

}