不多說直接上源代碼package?噠噠租車系統(tǒng); import?java.util.Scanner; public?class?Initail?{ public?static?void?Welcome(){ System.out.println("歡迎來到噠噠租車，請問您是否需要租車？"); System.out.println("A、是,B、不是"); Scanner?s=new?Scanner(System.in); String?link?=?s.nextLine(); if(link.equals("A")){ System.out.println("正在進(jìn)入瀏覽界面，請稍等……"); Xuanche(); }else?if(link.equals("B")){ System.out.println("正在啟動爆炸系統(tǒng)，請稍后……"); }else{ System.out.println("輸入了無效的數(shù)值，請重新輸入！"); Welcome(); } } public?static??void?Xuanche(){ Car?car?=?new?Car(); ACar?car1?=?new?AoDiA4(); ACar?car2?=?new?MaZiDa6(); ACar?car3?=?new?PiKaXue6(); ACar?car4?=?new?JingLong(); ACar?car5?=?new?Sonhuajiang(); ACar?car6?=?new?YiWeiKe(); PiKaXue6?car7?=?new?PiKaXue6(); car.car(); car1.size();car1.aclass();car1.money();car1.manay(); car2.size();car2.aclass();car2.money();car2.manay(); car3.size();car3.aclass();car3.money();car3.manay();car7.huowu(); car4.size();car4.aclass();car4.money();car4.manay(); car5.size();car5.aclass();car5.money();car5.manay(); car6.size();car6.aclass();car6.money();car6.manay(); Shuliang(); } public?static?void?Shuliang(){ System.out.println("請輸入您需要租用的車的數(shù)量!"); Scanner?s?=new?Scanner(System.in); int?i?=?s.nextInt(); int[]?num=new?int[]{}; if(?i?==?7?){ System.out.println("您好，您所輸入的數(shù)值無效，我們沒有那么多的車輛供您使用！請重新輸入！"); Shuliang(); }else?if(i?<?7){ System.out.println("輸入了有效數(shù)值，正在為你載入……"); for(int?j=1;j<=i;j++){ ?System.out.println("請輸入您所要選擇的"+j+"輛車的序號"); Scanner?num1?=?new?Scanner(System.in); int?x=num1.nextInt(); if(x==1){ ACar?car1?=?new?AoDiA4(); car1.size();car1.aclass();car1.money();car1.manay(); }else?if(x==2){ ACar?car2?=?new?MaZiDa6(); car2.size();car2.aclass();car2.money();car2.manay(); }else?if?(x==3){ ACar?car3?=?new?PiKaXue6();PiKaXue6?car7?=?new?PiKaXue6(); car3.size();car3.aclass();car3.money();car3.manay();car7.huowu(); }else?if?(x==4){ ACar?car4?=?new?JingLong(); car4.size();car4.aclass();car4.money();car4.manay(); }else?if?(x==5){ ACar?car5?=?new?Sonhuajiang(); car5.size();car5.aclass();car5.money();car5.manay(); }else?if?(x==6){ ACar?car6?=?new?YiWeiKe(); car6.size();car6.aclass();car6.money();car6.manay(); }else{ System.out.println("您的輸入錯誤，請重新輸入。"); Shuliang(); } System.out.println("請輸入借用天數(shù)："); Scanner?day?=new?Scanner(System.in); int?time?=?day.nextInt(); int?sum?=?0?; ACar?car1?=?new?AoDiA4(); ACar?car2?=?new?MaZiDa6(); ACar?car3?=?new?PiKaXue6(); ACar?car4?=?new?JingLong(); ACar?car5?=?new?Sonhuajiang(); ACar?car6?=?new?YiWeiKe(); PiKaXue6?car7?=?new?PiKaXue6(); for(int?qian=0;qian<=j;qian++){ sum?=time?*=?car?+?x.money;; } System.out.println("您需要花費(fèi)"+sum+"元來借用這些車輛！"); } }else{ System.out.println("輸入了無效的值，請重新輸入1-7之間的數(shù)值。"); Shuliang(); } } public?static?void?main(String[]?args){ Welcome(); } } for(int?qian=0;qian<=j;qian++){ sum?=time?*=?car?+?x.money;; }問題的關(guān)鍵是這里要如何使他自動的分析并帶入car(x).money（這段話是為了描述，實(shí)質(zhì)上是寫不出來的）