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抽象類和接口的處理求指點

抽象類和接口的處理求指點

花灬瞳 2016-04-22 16:11:43
就是JAVA第二季最后一個綜合練習(xí),就是想問如果運用抽象和接口時是不是這樣處理和拆分。 package?com.imocc; public?abstract?class?CarSystem?{ private?int?number; private?String?name; private?int?money; public?int?getNumber()?{ return?number; } public?void?setNumber(int?number)?{ this.number?=?number; } public?String?getName()?{ return?name; } public?void?setName(String?name)?{ this.name?=?name; } public?int?getMoney()?{ return?money; } public?void?setMoney(int?money)?{ this.money?=?money; } } package?com.imocc; public?interface?Passenger?{ public?void?setPassenger(int?passengere); public?int?getPassenger(); } package?com.imocc; public?interface?Goods?{ public?void?setGoods(int?goods); public?int?getGoods(); } package?com.imocc; public?class?Bus?extends?CarSystem?{ private?int?passenger; public?int?getPassenger()?{ return?passenger; } public?void?setPassenger(int?passenger)?{ this.passenger?=?passenger; } public?Bus(int?number,String?name,int?money,int?passenger){ this.setNumber(number); this.setName(name); this.setMoney(money); this.setPassenger(passenger); } ? } package?com.imocc; public?class?Lorries?extends?CarSystem?implements?Goods?{ private?int?goods; @Override public?void?setGoods(int?goods)?{ //?TODO?Auto-generated?method?stub this.goods=goods; } @Override public?int?getGoods()?{ //?TODO?Auto-generated?method?stub return?goods; } public?Lorries(int?number,String?name,int?money,int?goods){ this.setNumber(number); this.setName(name); this.setMoney(money); this.setGoods(goods);; } } package?com.imocc; public?class?Pika?extends?CarSystem?implements?Goods,?Passenger?{ private?int?passenger; private?int?goods; public?int?getPassenger()?{ return?passenger; } public?void?setPassenger(int?passenger)?{ this.passenger?=?passenger; } public?int?getGoods()?{ return?goods; } public?void?setGoods(int?goods)?{ this.goods?=?goods; } public?Pika(int?number,String?name,int?money,int?passenger,int?goods){ this.setNumber(number); this.setName(name); this.setMoney(money); this.setPassenger(passenger); this.setGoods(goods); } } package?com.imocc; public?class?CarList?{ ?CarSystem?[]?car={new?Bus(1,"奧迪A4",500,4),new?Bus(2,"馬自達6",400,4),new?Pika(3,"皮卡雪6",450,4,2),new?Bus(4,"?金龍?",800,20), ??????????new?Lorries(5,"松花江",400,4),new?Lorries(6,"依維柯",1000,20)}; ????? } package?com.imocc; import?java.util.Scanner; public?class?CarText?{ public?static?void?main(String[]?args)?{ //?TODO?Auto-generated?method?stub CarList?cl=new?CarList(); System.out.println("歡迎來到滴滴租車系統(tǒng)!"); System.out.println("請問是否租車:1,是2.否"); Scanner?c=new?Scanner(System.in); int?k=c.nextInt(); if(k==1){ System.out.println("您可租車的類型及其價目表:"); System.out.println("序號"+"\t"+"汽車名稱"+"\t"+"租金"+"\t"+"乘客/載重"); for(CarSystem?cs:cl.car){ if(cs?instanceof?Bus){ System.out.println(cs.getNumber()+"\t"+cs.getName()+"\t"+cs.getMoney()+"\t"+((Bus)cs).getPassenger()); } if(cs?instanceof?Lorries){ System.out.println(cs.getNumber()+"\t"+cs.getName()+"\t"+cs.getMoney()+"\t"+"\t"+((Lorries)cs).getGoods()); } if(cs?instanceof?Pika){ System.out.println(cs.getNumber()+"\t"+cs.getName()+"\t"+cs.getMoney()+"\t"+((Pika)cs).getPassenger()+"\t"+((Pika)cs).getGoods()); } } System.out.println("請輸入您要租的汽車的"); int?a=c.nextInt()-1; System.out.println(cl.car[a].getName()); System.out.println("請輸入您要租的天數(shù)"); int?b=c.nextInt(); System.out.println("你需要支付的金額:"+b*cl.car[a].getMoney()); } else?if(k==2){ System.out.println("歡迎再次光臨"); } } }
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?
沖啊

TA貢獻15條經(jīng)驗 獲得超3個贊

你只要理解一點,抽象類中的方法只有定義,且使用abstract關(guān)鍵字,子類只能繼承一個類,如果子類繼承了抽象類,則應(yīng)該實現(xiàn)父類的所有抽象方法。而接口,使用interface關(guān)鍵字,也只是方法的定義,里面的方法隱式的使用了Abstract關(guān)鍵字,某個類可以繼承多個接口,但都得實現(xiàn)相應(yīng)接口的所有方法。

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反對 回復(fù) 2016-06-05
?
qq___524

TA貢獻171條經(jīng)驗 獲得超74個贊

這不是一個java文件吧,多個文件的代碼放在一起了吧

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反對 回復(fù) 2016-04-22
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