// FiledbFile=newFile("/data/data/com.example.accountsoft.activity/databases/account.db");// try{// dbFile.createNewFile();// }catch(IOExceptione){// //TODOAuto-generatedcatchblock// e.printStackTrace();// }// dbFile.delete();

Thisbookintroducesyoutotheworldofdatastructuresandalgorithms.Datastructuredefinesthewaydataisarrangedincomputermemoryforfastandefficientaccesswhilealgorithmisasetofinstructiontosolveproblemsbymanipulatingthesedatastructures.DataStructuresalgorithmsInGoHemantjainCopyrightoHemantJain2017.AllRightReservedHemantJainassertsthemoralrighttobeidentifiedasheauthorofthisworkAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinorintroducedintoaretrievalsystem,ortransmitted,inanyform,orbyanymeans(electrical,mechanical,photocopying,recordingorotherwise)withoutthepriorwrittenpermissionoftheauthor,exceptinthecaseofverybriefquotationsembodiedincriticalreviewsandcertainothernonco妹妹ercialusespermittedbycopyrightlaw.AnypersonwhodoesanyunauthorizedactinrelationtothispublicationmaybeliabletocriminalprosecutionandcivilclaimsfordamagesACKNOWLEDGEMENTTheauthorisverygratefultoGodALMIGhTYforhisgraceandblessingDeepestgratitudeforthehelpandsupportofmybrotherDrSumantJain.ThisbookwouldnothavebeenpossiblewithoutthesupportandencouragementheprovidedIwouldliketoexpressprofoundgratitudetomyguide/myfriendNaveenKaushikforhisinvaluableencouragement,supervisionandusefulsuggestionthroughoutthisbookwritingwork.hissupportandcontinuousguidanceenablemetocompletemyworksuccessfuFinallyyetimportantly,IamthankfultoLoveSinghal,AnilberryandotherswhohelpedmedirectlyorindirectlyincompletingthisbookHemantJainTABLEOFCONTENTSACKNOWLEDGEMENTTABLEOFCONTENTSChAPTERO:HOWTOUSETHISBOOKWHATTHISBOOKISABOUTPREPARATIONPLANSSUMMARYChAPTER1:NTRODUCTION-PROGRAMMIINGOVERVIEWINTRODUCTIONFIRSTGOPROGRAMvariablesconstantsBASICDATATYPESSTRINGCONDITIONSANDLOOPSFUNCTIONPARAMETERPASSINGCALLBYVALUEPOINTERSPARAMETERPASSING.CALLBYPOINTER/REFERENCESTRUCTURESMETHODSINTERFACEARRaySLICEMAP/DICTIONARYARRAYINTERVIEWQUESTIONSCONCEPTOFSTACKSYSTEMSTACKANDMETHODCALLSRECURSIVEFUNCTIONEXERCISESCHAPTER2:ALGORITHMSANALYSISINTRODUCTIONALGORITHMASYMPTOTICANALYSISBIG-ONOTATIONOMEGA-QNOTATIONTHETA-⊙NOTATIONCOMPLEXITYANALYSISOFALGORITHMSTIMECOMPLEXITYORDERDERIVINGTHERUNTIMEFUNCTIONOFANALGORITHMTIMECOMPLEXITYEXAMPLESMASTERTHEOREMMODIFIEDMASTERTHEOREMEXERCISECHAPTER3:APPROACHTOSOLVEALGORITHMDESIGNPROBLEMSINTRODUCTIONCONSTRAINTSIDEAGENERATIONCOMPLEXITIESCODINGTESTINGEⅹAMPLESUMMARYChaPTER4:ABSTRACTDATATYPEGOCollECtIonsABSTRACTDATATYPE(ADTDATA-STRUCTUREGOCOLLECTIONFRAMEWORKACKQUEUETREEBINARYTREEBINARYSEARCHTREES(BSTPRIORITYQUEUE(HEAPHASH-TABLEDICTIONARY/SYMBOLTABLEGRAPHSGRAPHALGORITHMSSORTINGALGORITHMSCOUNTINGSORTENDNOTEchaPTER5:SEARCHINGINTRODUCTIONWHYSEARCHING?DIFFERENTSEARCHINGALGORITHMSLINEARSEARCH-UNSORTEDINPUTLINEARSEARCH-SORTEDBINARYSEARCHSTRINGSEARCHINGALGORITHMSHASHINGANDSYMBOLTABLESHOWSORTINGISUSEFULINSELECTIONALGORITHM?PROBLEMSINSEARCHINGEXERCISECHAPTER6:SORTINGINTRODUCTIONTYPEOFSORTINGBUBBLE-SORTMODIFIED(IMPROVED)BUBBLE-SORTINSERTION-SORTSELECTION-SORTMERGE-SORTQUICK-SORTQUICKSELECTBUCKETSORTGENERALIZEDBUCKETSORTHEAP-SORTTREESORTINGEXTERNALSORT(EXTERNALMERGE-SORTICOMPARISONSOFTHEVARIOUSSORTINGALGORITHMSSELECTIONOFBESTSORTINGALGORITHMEXERCISEChAPTER7:LINKEDLISTINTRODUCTIONLINKEDLISTTYPESOFLINKEDLISTSINGLYLINKEDLISTDOUBLYLINKEDLISTCIRCULARLINKEDLISTDOUBLYCIRCULARLISTEXERCISEchapter8:STACKINTRODUCTIONTHESTACKABSTRACTDATATYPESTACKUSINGSLICESSTACKGENERICIMPLEMENTATIONSTACKUSINGLINKEDLISTPROBLEMSINSTACKUSESOFSTACKEXERCISEchaPTER9:QUEUEINTRODUCTIONTHEQUEUEABSTRACTDATATYPEQUEUEUSINGLISTQUEUEUSINGLINKEDLISTPROBLEMSINQUEUEEXERCISECHAPTER10:TREEINTRODUCTIONTERMINOLOGYINTREEBINARYTREETYPESOFBINARYTREESPROBLEMSINBINARYTREEBINARYSEARCHTREE(BST)PROBLEMSINBINARYSEARCHTREE(BSTISEGMENTTREEAVLTREESRED-BLACKTREESPLAYTREEB-TREEB+TREEB*TREEEXERCISECHAPTERIl:PRIORITYQUEUEINTRODUCTIONTYPESOFHEAPHEAPADTOPERATIONSOPERATIONONHEAPHEAP-SORTUSESOFHEAPPROBLEMSINHEAPPRIORITYQUEUEGENERICIMPLEMENTATION.PRIORITYQUEUEUSINGHEAPFROMCONTAINER.EXERCISECHAPTER12:HASH-TABLEINTRODUCTIONHASH-TABLEHASHIINGWITHOPENADDRESSINGHASHINGWITHSEPARATECHAININGPROBLEMSINHASHINGEXERCISEChaPTER13:GRAPHSINTRODUCTIONGRAPHREPRESENTATIONADJACENCYMATRIXADJACENCYLISTGRAPHTRAVERSALSDEPTHFIRSTTRAVERSALBREADTHFIRSTTRAVERSALPROBLEMSINGRAPHDIRECTEDACYCLICGRAPHTOPOLOGICALSORTMINIMUMSPANNINGTREES(MST)SHORTESTPATHALGORITHMSINGRAPHEXERCISEChAPTER14:STRINGALGORITHMSTRODUCTIONSTRINGMATCHINGDICTIONARY/SYMBOLTABLEPROBLEMSINSTRINGEXERCISECHAPTER15:ALGORITHMDESIGNTECHNIQUESNTRODUCTIONBRUTEFORCEALGORITHMGREEDYALGORITHMDIVIDE-AND-CONQUER,DECREASE-AND-CONQUERDYNAMICPROGRAMMINGREDUCTIONTRANSFORM-AND-CONQUERBACKTRACKINGBRANCH-AND-BOUNDAALGORITHMCONCLUSIONCHAPTER16:BRUTEFORCEALGORITHMINTRODUCTIONPROBLEMSINBRUTEFORCEALGORITHMCONCLUSIONCHAPTER17:GREEDYALGORITHMINTRODUCTIONPROBLEMSONGREEDYALGORITHMCHAPTER18:DIVIDE-AND-CONQUER,DECREASE-AND-CONQUER

URTracker3.3真正完美破解高级无限制版，居于urtracker330free上破解，用兴味索取的朋友，请留言（附上邮箱地址）。
官方简介:http://urtracker.cn《URTracker事务跟踪系统》是一款通用的问题跟踪（IssueTracking）软件。
它用于帮助企业和团队建立各种类型的问题处理流程，管理所有的问题并跟踪记录这些问题的处理过程，同时为使用者提供一个分配、流转和协作处理问题的工作平台。
它还内置了知识库功能，方便用户转化问题中的有价值的信息、积累和分享各种知识。
URTracker广泛应用于产品开发管理、项目管理、团队协作、客户服务、日常办公等各个方面：产品缺陷/bug跟踪（Defect/bugTracking）工作任务跟踪（TaskTracking）问题解决过程跟踪（ProblemTracking）产品需求管理（RequestManagement）客户服务过程跟踪（CustomerSupportTracking）知识库管理（KnowledgeBasemanagement）IT服务管理（帮助台HelpDesk、事件和问题管理等）其它类型的事务跟踪（信息管理、日常办公流程、审核审批、考核绩效、各种业务流程的实现等）在5年多的时间里，URTracker被众多的商业客户选择并应用，并且成为了他们极其重要的工作平台。
它的灵活性、实用性和价值已经被广泛验证。
我们相信URTracker也一定能够为您带来有效的帮助。

RBF网络训练程序C++源代码，可以完成网络训练和网络测试功能。
-RBFthenetworktrainingprocedureCsourcecode,maycompletethenetworktrainingandthenetworktestfunction

offensive-security-backtrack渗透教程（官方版）英文不好的同窗就不要下载了，这是官方的英文文档，不过，稍有英文基础的同窗可以借助google看看，关键在于理解！！！

packageChatRoomTCPQQ谈天室;importjava.io.BufferedReader;importjava.io.IOException;importjava.io.InputStreamReader;importjava.io.PrintWriter;importjava.net.Socket;importjava.net.UnknownHostException;importjavax.swing.JOptionPane;publicclassChatRoomClent{privateSockets;publicChatRoomClent(Stringhost,intport){try{s=newSocket(host,port);}catch(UnknownHostExceptione){e.printStackTrace();}catch(IOExceptione){e.printStackTrace();}}publicvoidsendMessage(Stringstr){PrintWriterpw=null;try{pw=newPrintWriter(s.getOutputStream());pw.println(str);pw.flush();}catch(IOExceptione){e.printStackTrace();}}publicStringreciveMessage(){BufferedReaderbr=null;Stringstr="";try{br=newBufferedReader(newInputStreamReader(s.getInputStream()));str=br.readLine();}catch(IOExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}returnstr;}}

JDBC的jar包//System.out.println("sql语句是："+sql);inti=0;//数据库连接DBConnectiondb=newDBConnection();try{PreparedStatementpreStmt=(PreparedStatement)db.conn.prepareStatement(sql);preStmt.executeUpdate();preStmt.close();db.close();//关闭连接i=1;//System.out.println("数据插入成功，sql语句是："+sql);}catch(Exceptione){e.printStackTrace();}returni;//前往影响的行数，1为执行成功;

这是用Java编写的一个简单的银行转账系统，包括取款，存款，转账等功能，其中用到了数据库的连接，采用Eclipse编写，包含数据库的设计文件。
非常适合有一定基础的Java初学者使用。
packagecom.gujunjia.bank;/**Tochangethistemplate,chooseTools|Templates*andopenthetemplateintheeditor.*/importjava.sql.*;/****@authorgujunjia*/publicclassDataBase{ staticConnectionconn; staticPreparedStatementst; staticResultSetrs; /** *加载驱动 */ publicstaticvoidloadDriver() { try { Class.forName("com.mysql.jdbc.Driver"); } catch(ClassNotFoundExceptione) { System.out.println("加载驱动失败"); } } /** *创建数据库的连接 * *@paramdatabase *需要访问的数据库的名字 */ publicstaticvoidconnectionDatabase(Stringdatabase) { try { Stringurl="jdbc:mysql://localhost:3306/"+database; Stringusername="root"; Stringpassword="gujunjia"; conn=DriverManager.getConnection(url,username,password); } catch(SQLExceptione) { System.out.println(e.getMessage()); } } /** *关闭数据库连接 */ publicstaticvoidcloseConnection() { if(rs!=null) {//关闭记录集 try { rs.close(); } catch(SQLExceptione) { e.printStackTrace(); } } if(st!=null) {//关闭声明 try { st.close(); } catch(SQLExceptione) { e.printStackTrace(); } } if(conn!=null) {//关闭连接对象 try { conn.close(); } catch(SQLExceptione) { e.printStackTrace(); } } }}packagecom.gujunjia.bank;/**Tochangethistemplate,chooseTools|Templates*andopenthetemplateintheeditor.*/importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;/***本类次要实现整个系统的界面**@authorgujunjia*/publicclassMainFrameextendsJFrameimplementsActionListener,FocusListener{ /** * */ privatestaticfinallongserialVersionUID=1L; publicstaticStringuserId; JTextFielduserIdText; JPasswordFieldpasswordText; JButtonregisterButton; JButtonlogInButton; publicMainFrame() { super("个人银行系统

生成100个随机数，随机数取值于[0，100）之间，计算小于等于50的随机数个数和大于50的随机数个数。
并把这两个统计数字放在数据库表的一行的两列中，即输入的结果有一行，一行包括两列，每列是一个统计值。

DesignandimplementprofessionallevelprogramsbyexploringmoderndatastructuresandalgorithmsinRust.Rusthascomealongwayandisnowutilizedinseveralcontexts.Itskeystrengthsareitssoftwareinfrastructureandresource-constrainedapplications,includingdesktopapplications,servers,andperformance-criticalapplications,notforgettingitsimportanceinsystems’progra妹妹ing.ThisbookwillbeyourguideasittakesyouthroughimplementingclassicdatastructuresandalgorithmsinRust,helpingyoutogetupandrunningasaconfidentRustprogra妹妹er.ThebookbeginswithanintroductiontoRustdatastructuresandalgorithms,whilealsocoveringessentiallanguageconstructs.Youwilllearnhowtostoredatausinglinkedlists,arrays,stacks,andqueues.Youwillalsolearnhowtoimplementsortingandsearchingalgorithms.Youwilllearnhowtoattainhighperformancebyimplementingalgorithmstostringdatatypesandimplementhashstructuresinalgorithmdesign.Thebookwillexaminealgorithmanalysis,includingBruteForcealgorithms,Greedyalgorithms,DivideandConqueralgorithms,DynamicProgra妹妹ing,andBacktracking.Bytheendofthebook,youwillhavelearnedhowtobuildcomponentsthatareeasytounderstand,debug,anduseindifferentapplications.WhatyouwilllearnDesignandimplementcomplexdatastructuresinRustAnalyze,implement,andimprovesearchingandsortingalgorithmsinRustCreateandusewell-testedandreusablecomponentswithRustUnderstandthebasicsofmultithreadedprogra妹妹ingandadvancedalgorithmdesignBecomefamiliarwithapplicationprofilingbasedonbenchmarkingandtestingExploretheborrowingcomplexityofimplementingalgorithms

在日常工作中，钉钉打卡成了我生活中不可或缺的一部分。然而，有时候这个看似简单的任务却给我带来了不少烦恼。 每天早晚，我总是得牢记打开钉钉应用，点击"工作台"，再找到"考勤打卡"进行签到。有时候因为工作忙碌，会忘记打卡，导致考勤异常，影响当月的工作评价。而且，由于我使用的是苹果手机，有时候系统更新后，钉钉的某些功能会出现异常，使得打卡变得更加麻烦。 另外，我的家人使用的是安卓手机，他们也经常抱怨钉钉打卡的繁琐。尤其是对于那些不太熟悉手机操作的长辈来说，每次打卡都是一次挑战。他们总是担心自己会操作失误，导致打卡失败。 为了解决这些烦恼，我开始思考是否可以通过编写一个全自动化脚本来实现钉钉打卡。经过一段时间的摸索和学习，我终于成功编写出了一个适用于苹果和安卓系统的钉钉打卡脚本。