OOP Exercise1（Encapsulation）

Cars 

Implement a class Car, which contains the fields (5 points):

• make, e.g. Ford, Subaru, Toyota ...
• model, e.g., Escape, Outback, Camry ...
• year
• MPG miles per gallon
• milesDriven, the total number of miles ever driven in this car.
• fuelCapacity in gallons, i.e., the size in gallons of the fuel tank.
• fuelRemaining, which represents the amount of fuel remaining in the gas tank.

Implement at least the following methods within the Car class (5 points each):

• a constructor, which initializes each of the fields
• fillTank(double g), which adds up to g gallons of gas to the fuel tank, but not more than the car's fuel capacity.
• drive(double m), which simulates driving m miles in the car, adding to the total number of miles driven, and reducing the amount of gas in the car according to this car's average MPG.
• toString( ), which returns a String representation of the car.
• getFuelRemaining( ), which returns the amount of fuel left in the tank.

For example, we should be able to do something like the following:

    Car oldJunker = new Car("Ford", "Pinto", 1972, 17.5, 132480, 12, 8); // creates a new Car object
    oldJunker.drive(5); // drives the Car 5 miles
    oldJunker.fillTank(1); // put in a gallon of gas
    System.out.println(oldJunker.getFuelRemaining()); // prints the amount of fuel left
    System.out.println(oldJunker); // prints the attributes of the car to the screen

Write a short driver program to test your Car class with a short array of Cars (5 points).

 

 

========================================中文

类：Cars
属性：
make（厂商）,如：福特, 斯巴鲁，桑塔纳...
year（生产年份）
KMPG （每升油跑多少公里）
milesDriven（里程数，即这辆车一共开了多少公里）,
fuelCapacity （油箱容量，单位是升）
fuelRemaining（油量剩余）
方法：
1.构造，用于初始化所有属性
2.加油： fillTank(double g)
g是加油的量，单位升，这个油量需要累加的剩余油量中，但加完油后如果剩余油量大于油箱容量，则剩余油量设置为油量容量
3.开车：drive(double km)
km是开了多少公里，该路程要累加到里程数中
同时，剩余油量会要减少（怎么减，自己思考）
4.toString( )方法
5.所有属性的get、set方法