package?com.jason_zhai;

/**
?*?@author?Jason
?*?Define?Auto?Class?and?methods.
?*/
public?abstract?class?Auto?{?//定義父類Auto
	public?String?name;?//define?name
	public?float?price;?//define?price
	public?float?cargoLoad;
	public?float?peopleLoad;
	
	public?Auto(String?name,?float?price,?float?cargoLoad,?float?peopleLoad)?{?//定義父類構(gòu)造方法
		this.name?=?name;
		this.price?=?price;
		this.cargoLoad?=?cargoLoad;
		this.peopleLoad?=?peopleLoad;
	}
}



package?com.jason_zhai;?
public?class?Truck?extends?Auto?{?//定義Truck子類
	public?Truck(String?name,?float?price,?float?cargoLoad,?float?peopleLoad)?{
		super(name,?price,?cargoLoad,?peopleLoad);
	}
}



package?com.jason_zhai;
public?class?Sedan?extends?Auto?{?//定義轎車子類
	public?Sedan(String?name,?float?price,?float?cargoLoad,?float?peopleLoad)?{
		super(name,?price,?cargoLoad,?peopleLoad);
	}
}



package?com.jason_zhai;
public?class?Pickup?extends?Auto?{?//定義皮卡子類
	public?Pickup(String?name,?float?price,?float?cargoLoad,?float?peopleLoad)?{
		super(name,?price,?cargoLoad,?peopleLoad);
	}
}



package?com.jason_zhai;
import?java.util.Scanner;

public?class?Initial?{

	public?static?void?main(String[]?args)?{
		//?TODO?Auto-generated?method?stub
		Scanner?input1?=?new?Scanner(System.in);
		System.out.print("Do?you?want?to?rent?a?car??1--yes,?2--no");
		int?userChoice1?=?input1.nextInt();
		if(userChoice1?==?1)?{
			System.out.println("you?choose?to?rent?a?car!");
			System.out.println("we?have?below?choices?for?you");
			Truck?truck1?=?new?Truck("changan",?200,?5,?0);
			Truck?truck2?=?new?Truck("volvo",?400,?20,?0);
			Sedan?sedan1?=?new?Sedan("audi",?500,?0,?4);
			Sedan?sedan2?=?new?Sedan("mazda",?300,?0,?10);
			Pickup?pickup1?=?new?Pickup("dodge",?400,?4,?10);
			System.out.println("1.?"?+?truck1.name?+?"?price:"?+?truck1.price);
			System.out.println("2.?"?+?truck2.name?+?"?price:"?+?truck2.price);
			System.out.println("3.?"?+?sedan1.name?+?"?price:"?+?sedan1.price);
			System.out.println("4.?"?+?sedan2.name?+?"?price:"?+?sedan2.price);
			System.out.println("5.?"?+?pickup1.name?+?"?price:"?+?pickup1.price);
			
			System.out.println("please?enter?how?many?cars?you?want?to?rent?");
			Scanner?input2?=?new?Scanner(System.in);
			int?userChoice2?=?input2.nextInt();
			float?sumCargo?=?0;
			float?sumPeople?=?0;
			float?sumPrice?=?0;
			for?(int?i?=?1;?i?<=?userChoice2;?i++)?{
				System.out.println("please?choose?your?"?+?i?+?"?vehicle!");
				Scanner?input3?=?new?Scanner(System.in);
				int?userChoice3?=?input3.nextInt();
				switch?(userChoice3)?{
				case?1:
					System.out.println("You?chose?"?+?truck1.name
							+?"?with?price?"?+?truck1.price
							+?"?per?day?loading?"?+?truck1.cargoLoad
							+?"T?cargo?and?"?+?truck1.peopleLoad?+?"?people!");
					sumCargo?=?truck1.cargoLoad?+?sumCargo;
					sumPeople?=?truck1.peopleLoad?+?sumPeople;
					sumPrice?=?truck1.price?+?sumPrice;
					System.out.println("your?total?cargo?load?is?"?+?sumCargo);
					System.out
							.println("your?total?people?load?is?"?+?sumPeople);
					System.out.println("your?total?price?is?"?+?sumPrice);
					System.out.println();
					break;
				case?2:
					System.out.println("You?chose?"?+?truck2.name
							+?"?with?price?"?+?truck2.price
							+?"?per?day?loading?"?+?truck2.cargoLoad
							+?"T?cargo?and?"?+?truck2.peopleLoad?+?"?people!");
					sumCargo?=?truck2.cargoLoad?+?sumCargo;
					sumPeople?=?truck2.peopleLoad?+?sumPeople;
					sumPrice?=?truck2.price?+?sumPrice;
					System.out.println("your?total?cargo?load?is?"?+?sumCargo);
					System.out
							.println("your?total?people?load?is?"?+?sumPeople);
					System.out.println("your?total?price?is?"?+?sumPrice);
					System.out.println();
					break;
				case?3:
					System.out.println("You?chose?"?+?sedan1.name
							+?"?with?price?"?+?sedan1.price
							+?"?per?day?loading?"?+?sedan1.cargoLoad
							+?"T?cargo?and?"?+?sedan1.peopleLoad?+?"?people!");
					sumCargo?=?sedan1.cargoLoad?+?sumCargo;
					sumPeople?=?sedan1.peopleLoad?+?sumPeople;
					sumPrice?=?sedan1.price?+?sumPrice;
					System.out.println("your?total?cargo?load?is?"?+?sumCargo);
					System.out
							.println("your?total?people?load?is?"?+?sumPeople);
					System.out.println("your?total?price?is?"?+?sumPrice);
					System.out.println();
					break;
				case?4:
					System.out.println("You?chose?"?+?sedan2.name
							+?"?with?price?"?+?sedan2.price
							+?"?per?day?loading?"?+?sedan2.cargoLoad
							+?"T?cargo?and?"?+?sedan2.peopleLoad?+?"?people!");
					sumCargo?=?sedan2.cargoLoad?+?sumCargo;
					sumPeople?=?sedan2.peopleLoad?+?sumPeople;
					sumPrice?=?sedan2.price?+?sumPrice;
					System.out.println("your?total?cargo?load?is?"?+?sumCargo);
					System.out
							.println("your?total?people?load?is?"?+?sumPeople);
					System.out.println("your?total?price?is?"?+?sumPrice);
					System.out.println();
					break;
				case?5:
					System.out.println("You?chose?"?+?pickup1.name
							+?"?with?price?"?+?pickup1.price
							+?"?per?day?loading?"?+?pickup1.cargoLoad
							+?"T?cargo?and?"?+?pickup1.peopleLoad?+?"?people!");
					sumCargo?=?pickup1.cargoLoad?+?sumCargo;
					sumPeople?=?pickup1.peopleLoad?+?sumPeople;
					sumPrice?=?pickup1.price?+?sumPrice;
					System.out.println("your?total?cargo?load?is?"?+?sumCargo);
					System.out
							.println("your?total?people?load?is?"?+?sumPeople);
					System.out.println("your?total?price?is?"?+?sumPrice);
					System.out.println();
					break;
				}
			}
			
			System.out.println("please?enter?how?many?days?you?want?to?rent?");
			Scanner?input4?=?new?Scanner(System.in);
			int?userChoice4?=?input4.nextInt();
			sumPrice?=?sumPrice?*?userChoice4;
			
			System.out.println("Summarizaiton?of?your?bill?is:");
			System.out.println("Number?of?vehicles:?"?+?userChoice2);
			System.out.println("Days?of?rentle:?"?+?userChoice4);
			System.out.println("Total?price?is:?"?+?sumPrice);
			}else?if?(userChoice1?==?2)?{
			System.out.println("you?choose?not?to?rent?a?car!");
			System.exit(0);
		}else?{
			System.out.println("bad?input,?please?re-enter?your?choice!");
		}
	}

}

不知道為什么，自己在建立了一個(gè)父類并定義了一個(gè)構(gòu)造方法同時(shí)建立三個(gè)子類后就感覺類里面沒什么寫得了。其余的功能都在主函數(shù)里面實(shí)現(xiàn)了。 總感覺這樣不算是面向?qū)ο蟮母杏X，有沒有大神指導(dǎo)一下是思路哪里出了問題。 應(yīng)該怎么優(yōu)化？