具體的問題都在 initial 代碼的注釋里面了。

package?dadaCall;
	
public?abstract?class?AmotoCar?{

	public?double?orderSnowPeiceSum;
	
	public?abstract?void?motorMassege();
	public?abstract?double?orderMassege(double?orderCount);
}

package?dadaCall;

public?class?SnowCar?extends?AmotoCar?{
	int?passager?=?0;		//乘客數量
	int?loadWeight?=?5;		//載貨量
	double?orderPeice?=?500.0;//價格
	double?orderSnowPeiceSum;//本類車型訂單總花費
	double?orderCount;//本類車型訂單數量
	@Override
	public?void?motorMassege()?{	//輸出本類車型信息
		//?TODO?Auto-generated?method?stub
		System.out.printf("%s\t%s\t%s\t%s\t%s\n","1","輕型雪弗蘭","0人","5T","500Y/Day");
	}

	@Override
	public?double?orderMassege(double?orderCount)?{	//計算本類車型訂單花費
		//?TODO?Auto-generated?method?stub
		
		orderSnowPeiceSum?=?orderPeice?*?orderCount?;
		return?orderSnowPeiceSum;
	}

}

package?dadaCall;

public?class?PickUp?extends?AmotoCar?{

	int?passager?=?5;
	int?loadWeight?=?2;
	double?orderPeice?=?600.0;
	double?orderPickUpPeiceSum;
	int?orderCount;
	@Override
	public?void?motorMassege()?{
		//?TODO?Auto-generated?method?stub
		System.out.printf("%s\t%s\t%s\t%s\t%s\n","2","皮卡客貨","5人","2T","600Y/Day");
	}

	@Override
	public?double?orderMassege(double?orderCount)?{
		//?TODO?Auto-generated?method?stub
	
		orderPickUpPeiceSum?=?orderPeice?*?orderCount?;
		return?orderPickUpPeiceSum;
	}

}

package?dadaCall;
import?java.util.Scanner;
public?class?initial?{
		
	private?static?Scanner?scanner;//讀取輸入數據
	public?static?void?main(String[]?args)?{
		scanner?=?new?Scanner(System.in);
		System.out.printf("%s\n%s\n","你是否要選擇租車？","是請輸入1?，否請輸入其他數字。");
		//判斷用戶是否需要租車。此處如果輸入其他字符就會報錯，如何解決呢？
							
		int?a?=?scanner.nextInt();
		SnowCar?snowCar?=new?SnowCar();
		PickUp?pickUp	=new?PickUp();

		if(a?==?1){			//用戶選擇租車系統
			System.out.printf("%s\t%s\t%s\t%s\t%s\n","編號","車型","載客數","載貨量","價格");
			snowCar.motorMassege();
			pickUp.motorMassege();
			System.out.println("請輸入你想要租車數量：");	//此次（不使用鼠標點擊）進行輸入時，數字會卡在“編號”處，程序無法繼續進行，為什么呢？
			int?b?=?scanner.nextInt();
			int[]?Number?=?new?int?[b];//建立租車編號數組
			int?i?=?0;
			for?(;i<b;){			//for循環使用用戶輸入的租車編號對數組進行賦值
				int?j?=?i+1;
				System.out.println("請輸入第"+j+"輛車的編號");
				
				Number[i]?=?scanner.nextInt();
				System.out.println("你選擇的車輛編號是:"+Number[i]);
				/*System.out.println("如需要重新選擇本倆車編號，請輸入數字?0?!否者請輸入其他任意整數。");
				?int?c?=?scanner.nextInt();		//對用戶選擇車輛進行確認				
												//請問，為什么這里輸入0后，是從第二次輸入0才開始進行重置循環呢？如何解決？
				if(c?==?0){???????????				
					i?=?0;
					System.out.println(i);
					
				}*/
				i++;
				}
			System.out.println("你選擇租車的清單如下:");
			for(int?number:Number){
				switch?(number){
				case?1?:?			//遍歷租車編號數組，判斷租車的車型，并計數各種車型的租用數量
					snowCar.motorMassege();
					snowCar.orderCount++;
					break;
				case?2?:
					pickUp.motorMassege();
					pickUp.orderCount++;
					break;
					}
				}
		double?passagerSum?=?(snowCar.orderCount?*?snowCar.passager+pickUp.orderCount*pickUp.passager);
		System.out.println("您租車的可載人數為:"+passagerSum);
		double?loadWeightSum?=?snowCar.orderCount*snowCar.loadWeight+pickUp.orderCount*pickUp.loadWeight;?
		System.out.println("您租車的可載貨量為:"+loadWeightSum);
		double?costSum?=?snowCar.orderMassege(snowCar.orderCount)+?pickUp.orderMassege(pickUp.orderCount);
		System.out.println("您租車的費用為:"+costSum);
		
		}
		else?
			System.out.println("希望您下次需要租車的時候聯系我們");

	}
}