accp6.0java1第九章上机练习（accp6.0java1 ninth chapter practice on the computer）

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1、accp6.0java1第九章上机练习（Accp6.0java1ninthchapterpracticeonthecomputer）Exercise1:maintainanorderlylistofbooksImportjava.util.Scanner;/***insertbooksinsequence*/PublicclassBook{Publicstaticvoidmain(String[]args){String[]books=newString[]{,"Computer","Hibernate","Java","Struts"};String[

2、]newBooks=newString[books.length+1];//thebookintothearrayString="book";//keepabookfromtheusernameIntindex=books.length;//savenewinsertionposition//outputintotheresultsbeforeSystem.out.print("arraybeforeinsertion:");For(inti=0;I

3、opyinthebooksarrayelementstothearrayofnewBooksFor(inti=0;I

4、reToIgnoreCase(Book)>0){Index=i;Break;}}For(inti=newBooks.length-1;I>index;i--){NewBooks[i]=newBooks[i-1];theelementbeginningwiththe//indexsubscriptmovesonepositionlater}NewBooks[index]=book;//newelementsintheindexposition//outputafterinsertionoftheresultsSystem.out.print(inserta

5、rray:"");For(inti=0;I

6、tsum=0.0F;//thesumofscoresFloataverage=0.0F;//averagevalue//loopinputstudentachievementScannerinput=newScanner(System.in);System.out.println("pleaseentertheresultsof4participants");For(inti=0;I

7、xtInt();Sum=sum+score[i];//cumulativescore}Average=sum/score.length;//averageSystem.out.println(theaveragescoreofparticipantsis:+average);}}Exercise3:enterthenumberoflines,printrighttriangleImportjava.util.Scanner;/***enterthenumberoflinesandprintrighttriangles*/PublicclassRTriAn

8、gle{Publicstaticvoidmain(String[]args){I