2010下答案Java试卷答案

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1、2010年(下)全国信息技术水平考试计算机程序设技术水平证书（JAVA语言）理论考试试卷一、理论题（每小题1分，共30分）12345678910BCACDBBCBB11121314151617181920ACDDDACDDB21222324252627282930CDBCCADDBD二、实践题（共70分）1、（20分）publicclassTest1{publicTest1(){}publicstaticvoidmain(String[]args){Test1test1=newTest1();System.out.println(test1.GetStr(7));Sy

2、stem.out.println(test1.GetStr(32));System.out.println(test1.GetStr(899));}privateStringGetStr(intintNo){if(intNo<10)return"00"+intNo;elseif(intNo<100)return"0"+intNo;elsereturn""+intNo;}}2、（25分）publicclassTest2{publicTest2(){}publicstaticvoidmain(String[]args){fruit[]fruits=newfruit[5];

3、fruits[0]=newApple();fruits[1]=newOrange();fruits[2]=newBanana();fruits[3]=newApple();fruits[4]=newOrange();for(inti=0;i<5;i++){System.out.println(fruits[i].GetName());}}}abstractclassfruit{publicabstractStringGetName();}classAppleextendsfruit{publicStringGetName(){return"Apple";}}class

4、Orangeextendsfruit{publicStringGetName(){return"Orange";}}classBananaextendsfruit{publicStringGetName(){return"Banana";}}3、（25分）importjava.io.*;publicclassTest3{publicTest3(){}publicstaticvoidmain(String[]args){java.io.ObjectOutputStreamoos=null;java.io.ObjectInputStreamois=null;try{oos

5、=newjava.io.ObjectOutputStream(newFileOutputStream("customer.dat"));oos.writeObject(newCustomer("C001","jack","010-83438475","beijing"));oos.writeObject(newCustomer("C002","Rose","021-87676364","shanghai"));oos.writeObject(newCustomer("C002","Mick","020-87676364","guangzhou"));oos.close

6、();}catch(Exceptionex){System.out.println(ex);}Customercustomer=null;try{ois=newjava.io.ObjectInputStream(newFileInputStream("customer.dat"));while((customer=(Customer)ois.readObject())!=null){System.out.println("CustomerNo:"+customer.CustomerNo);System.out.println("CustomerName:"+custo

7、mer.CustomerName);System.out.println("Phone:"+customer.Phone);System.out.println("Address:"+customer.Address);System.out.println("==========================");}ois.close();}catch(java.io.EOFExceptioneofex){System.out.println("end");}catch(Exceptionex){System.out.println(ex);}}}