关于多态课后习题
大家谁完成率本节作业题？我都没搞懂意思，借鉴一下，谢谢
4 回答
建立一个父类，让子类继承其所有方法，获取车名，获取载客量，车辆租用量数，总金额等等
package class_car;
public class Car {
private String carName;
private int carryCapacity;
private int cargoCapacity;
private int perMoney;
private int perMoney;
private int num;
public int getNum() {
return num;
}
public void setNum(int _num) {
num += _num;
}
public String getCarName() {
return carName;
}
public int getCarryCapacity() {
return carryCapacity;
}
public int getCargoCapacity() {
return cargoCapacity;
}
public int getPerMoney() {
return perMoney;
}
}
子类方法继承，私有对象名字和每辆车的载客数载人数每辆车都用构造函数（构造方法）初始化，其余的不用初始化
例如
package class_car;
public class AodiA4 extends Car {
public AodiA4(){
carName = "奥迪";
carryCapacity = 4;
perMoney = 500;
cargoCapacity = 0;
num = 0;
moneyAll = 0;
}
private String carName;
private int carryCapacity,
perMoney, cargoCapacity;
private int num, moneyAll;
}剩下的 main 函数里 调用选择函数和打印总价函数
对象编号123456 可以用建立对象数组的方法分别为 012345 不用过说了吧
创建父类Traffic.java
package com.traffic;
public class Traffic {
String name = "Traffic";
private int passengerCapacity;
//Encapsulate passengerCapacity, just for test :D
public int getPC(){
return passengerCapacity;
}
public void setPC(int newPC){
passengerCapacity = newPC;
}
/**
* @param a
*/
public void whoAmI(Traffic a){
System.out.println(name + " can load " + a.getPC() + "people.");
}
}创建子类Car.java
package com.traffic;
public class Car extends Traffic {
String name = "Car";
public void whoAmI(Traffic a){
System.out.println(name + " can load " + a.getPC() + " people.");
}
}创建子类Airplane.java
package com.traffic;
public class Airplane extends Traffic {
String name = "Airplane";
public void whoAmI(Traffic a){
System.out.println(name + " can load " + a.getPC() + " people.");
}
}创建子类Boat.java
package com.traffic;
public class Boat extends Traffic {
String name = "Boat";
public void whoAmI(Traffic a){
System.out.println(name + " can load " + a.getPC() + " people.");
}
}创建程序人口Initial.java
package com.traffic;
public class Initial {
/**
* @param args
*/
public static void main(String[] args) {
// Create objects
Traffic car = new Car();
Traffic airplane = new Airplane();
Traffic boat = new Boat();
//set passenger capacity
car.setPC(8);
airplane.setPC(400);
boat.setPC(200);
//call function whoAmI()
car.whoAmI(car);
airplane.whoAmI(airplane);
boat.whoAmI(boat);
}
}查看3条回复
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