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  • My Future as a Developer

    - by jmquigley
    You have been a developer for 16 years, mostly in the unix environment woring with C, C++ and Java. You are proficient in those skills, but can always improve. The jobs for C and C++ developers working in the Unix environment are not as plentiful as they used to be, so you're looking to expand your skills. If you were going to focus on an area of technology for the next 10 years, and you had a choice of C# or to continue with your work in Java and expand those skills, which would you choose and why? I love being a programmer. I want to focus on an area that would put me in demand so that I can continue to be a programmer. This is not meant to be subjective, I'm looking for guidance and advice from other professionals. This is a question that is at the front of my mind right now. TIA.

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  • Part-time Programming Job London

    - by Bluechip Solutions
    I am a student at Middlesex Universtity, London studying Information Technology. I really love software development and I have taught myself how to write HTML + CSS, JavaScript (I use jQuery and AngularJS) and Java (I learnt this in school). I have developed few apps (a desktop app in Java and a mobile app with AngularJS and PhoneGap) I am looking at applying for a part-time programming job to develop myself. Are there part time jobs available for someone like me and are my skill set enough to get me a job? I understand this topic may not be ideal here but this is the only place I know can provide me answers. Thank you!

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  • What book do you recommend for the OCAJP certification (1Z0-803) and OCPJP (1Z0-804) [on hold]

    - by Muhammad Gelbana
    I find completely contradicting reviews for the VERY same book on amazon and even some book writers are rewarding people for good reviews so basically most of the reviews are totally fake ! You can even figure it out from the reviewer name, which you'll similar to the writer's name and assume that they could actually be from the same country and the reviewer is just being helpful, to the book writer of course ! I can't make my mind for which book I should buy ! I only need a book or two that covers the Java associate and professional topics very well, not just an overview, I need a material that covers everything from A to Z. Even though I've been developing in Java for around 4.5 years but I must not know a detail or two. Would someone kindly shed some light on a good book based on actual experience with the book ? THANK YOU !

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  • Either I'm not confident I just don't know anything [on hold]

    - by zoomerzoom25
    My name is Sael and I'm 14 years old. Since I was 12 and I got my first computer I instantly go interested in making games. So of course like any other I googled it, got discouraged and forgot about it for a few months. When I was 13 I decided to continue programming, and decided that java would best suit me. Now after a year, I have a basic understanding of java and how it works (it just clicked instantly one day). Anyways, my problem is that I know how I'm going to make a simple game in my head, but as soon as I click that "New Project" button on eclipse, I'm instantly lost and can't figure out where to start. I can't do much without a tutorial beside me since my mind is so dependent on it. So here's the question : what can I do to get past this problem of mine, and have any of you felt like this before? sorry if my English is a bit incorrect, Spanish is my main language* I've made Minecraft mods before

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  • Question about main(String[] args) [migrated]

    - by Andrew0085
    I'm new to programming, and I'm using java. Here's a program I wrote: class HelloApp { static String hi; public static void main(String[] args) { int length = args.length; if (length > 0) { hi = args[0]; sayHi(); } } static void sayHi() { if (hi == "hello") { System.out.println("Hello!"); } } } My question is: Why doesn't inputting "java HelloApp hello" make "Hello!" appear on the next line?

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  • ????????! ?????????????????JRockit Flight Recorder????|WebLogic Channel|??????

    - by ???02
    ???????????????????????????????????????WebLogic Server????????·??????????????????????????????????????????????WebLogic Server????????????????????????????????????????????????????????????????????????JRockit Flight Recorder???WebLogic Server????????????????????????????????????????????????????????????????????????????????????????(???)?????????????????――????????JRockit Flight Recorder　???????????·??????????????????????????????????????????????????????????????????????????????????　????Java?????(JVM:Java Virtual Machine)??????????????????????????????????·??????????????????·?????????????????????????????????·???·????????????????????????????????????????????·?????JVM?????????????????????????????????????????????????????????????????????????????????????????????　???JVM?????????????·??????(Out of Memory Error)????????????????·???????????·??????(GC)?????????????????????????????????????????????????????????JVM?????????GC????????????????????????????????????????????????　???????????????????2010?7?????????WebLogic Server Enterprise Edition 11g R1 Patch Set 2???????????????????JRockit Flight Recorder????????????????????????????????????????????????????????????????????????????????????????????????????JRockit Flight Recorder????????OS?????????·?????CPU??????????????????????JVM?????????JVM?????????·????????????·??????????????????·????????JVM?CPU????????·?????????·????JIT?????????????????Java????????·???????/???????????????/????????????WebLogic Server????????????EJB?JDBC?Web?????JTA??????????????????????????????　??WebLogic Server??????????????????????????JRockit Runtime Analyzer??????????Runtime Analyzer?????????????????????????????????????????WebLogic Server?????????????????????????????????JRockit Flight Recorder??????????????????????????????????????????????　JRockit Flight Recorder????????????????????????????????????????????????????????　???Java EE???????????????????????????????????????????????????JVM?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????　???????JRockit Flight Recorder????JVM(JRockit)?????????????????????????????????????????????????????????????3%??????????????????????????????????????????????????????????????????????????　????????JRockit Flight Recorder?????????????????????????????????????????????????????????????????????????JRockit Flight Recorder?????　JRockit Flight Recorder????????????????????(????????????????????????)??????????????????????????(???????·????)???????????????　???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????　???????JRockit Flight Recorder??????????????????????????????????????????·?????????????????????????????????????(?????GUI????Oracle JRockit Mission Control????)????????·??????????????????????????????JRockit Flight Recorder?????????????????????　??????????????????????JRockit Flight Recorder?WebLogic Server Enterprise Edition???????????WebLogic Server??????????????????????????????????????????????????????????????????????????????????????????????????　??????????JRockit Flight Recorder?????????????????????????????????????　????????JRockit Flight Recorder??????????????????????????????????????????·?????????????????JRockit Mission Control???????????????????????????????????????　??????????????????????????????????????????????????????????????????????????????????????????????????????????????　???????????????????????????????????????????????????????????????????????????????????????????????????????????????????　??????????????1????????????????????????????????????Thread Parked????????????????????????????????????????????Thread Parked?????????????????????????????　???JRockit Flight Recorder?JDBC??????????????????SQL??????????????????????????????????　??????·???????????????????????????JRockit Flight Recorder?????????1???????????SLA??????　JRockit Flight Recorder?????????????????????　????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????　????JRockit Flight Recorder???????????????????????????????????SLA(Service Level Agreement)??????????????????????????????????????????????????????????????????????????????????????????　????????????JRockit Flight Recorder???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????JRockit Flight Recorder????????????1???JRockit Flight Recorder?????????????????　????????JRockit Flight Recorder??????????????????????????????????????????????????　???JRockit Flight Recorder??????????????????1??????! ?????????????????????????????????3????????????????????????????6??????????????????13???????????????????????????????????????????????????????20???????????????????????35???????????????38??????????????????????????　???????JRockit Flight Recorder???????????????????????????1??????! ??????????????????JRockit Flight Recorder??????????????????????3???????????????????18???????????????21??????????????????????????　??????????????JRockit Flight Recorder????????????????????????????????????????JRockit Flight Recorder???????????????????????????????????????????????????JRockit Flight Recorder????????????　??????????????????·???????????????????????JRockit Flight Recorder???????????????????????????? ???????????????????????????????――???????????????????　???????????JRockit Flight Recorder??????2????1??????????????????????????????????????????????????????????　??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????JRockit Flight Recorder???????????????????????????????????????????????????????????????????SIer???????――???????/????????????????　JRockit Flight Recorder????????????????????IT?????????SIer?????????????　??????????????????????????SIer?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????(???????)??????????????????????????????????????????????????????????????????????????　???JRockit Flight Recorder??????????????????????????????????????????????????????????????????????????????????????????/????????????????????????????????????????*　　　*　　　*　???????WebLogic Server Enterprise Edition???????????????????JRockit Flight Recorder????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????WebLogic Server?????????????JVM Oracle JRockit??? ???? ···???JVM?Oracle JRockit??????????????????????????JRockit Flight Recorder????????????????? ?????45???????????????????????????????????? ?WMV?? ?MP4??

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  • ??Recovery Manager (RMAN)??

    - by ??
    Normal 0 7.8 ? 0 2 false false false EN-US ZH-CN X-NONE DefSemiHidden="true" DefQFormat="false" DefPriority="99" LatentStyleCount="267" UnhideWhenUsed="false" QFormat="true" Name="Normal"/ UnhideWhenUsed="false" QFormat="true" Name="heading 1"/ UnhideWhenUsed="false" QFormat="true" Name="Title"/ UnhideWhenUsed="false" QFormat="true" Name="Subtitle"/ UnhideWhenUsed="false" QFormat="true" Name="Strong"/ UnhideWhenUsed="false" QFormat="true" Name="Emphasis"/ UnhideWhenUsed="false" Name="Table Grid"/ UnhideWhenUsed="false" QFormat="true" Name="No Spacing"/ UnhideWhenUsed="false" Name="Light Shading"/ UnhideWhenUsed="false" Name="Light List"/ UnhideWhenUsed="false" Name="Light Grid"/ UnhideWhenUsed="false" Name="Medium Shading 1"/ UnhideWhenUsed="false" Name="Medium Shading 2"/ UnhideWhenUsed="false" Name="Medium List 1"/ UnhideWhenUsed="false" Name="Medium List 2"/ UnhideWhenUsed="false" Name="Medium Grid 1"/ UnhideWhenUsed="false" Name="Medium Grid 2"/ UnhideWhenUsed="false" Name="Medium Grid 3"/ UnhideWhenUsed="false" Name="Dark List"/ UnhideWhenUsed="false" Name="Colorful Shading"/ UnhideWhenUsed="false" Name="Colorful List"/ UnhideWhenUsed="false" Name="Colorful Grid"/ UnhideWhenUsed="false" Name="Light Shading Accent 1"/ UnhideWhenUsed="false" Name="Light List Accent 1"/ UnhideWhenUsed="false" Name="Light Grid Accent 1"/ UnhideWhenUsed="false" Name="Medium Shading 1 Accent 1"/ UnhideWhenUsed="false" Name="Medium Shading 2 Accent 1"/ UnhideWhenUsed="false" Name="Medium List 1 Accent 1"/ UnhideWhenUsed="false" QFormat="true" Name="List Paragraph"/ UnhideWhenUsed="false" QFormat="true" Name="Quote"/ UnhideWhenUsed="false" QFormat="true" Name="Intense Quote"/ UnhideWhenUsed="false" Name="Medium List 2 Accent 1"/ UnhideWhenUsed="false" Name="Medium Grid 1 Accent 1"/ UnhideWhenUsed="false" Name="Medium Grid 2 Accent 1"/ UnhideWhenUsed="false" Name="Medium Grid 3 Accent 1"/ UnhideWhenUsed="false" Name="Dark List Accent 1"/ UnhideWhenUsed="false" Name="Colorful Shading Accent 1"/ UnhideWhenUsed="false" Name="Colorful List Accent 1"/ UnhideWhenUsed="false" Name="Colorful Grid Accent 1"/ UnhideWhenUsed="false" Name="Light Shading Accent 2"/ UnhideWhenUsed="false" Name="Light List Accent 2"/ UnhideWhenUsed="false" Name="Light Grid Accent 2"/ UnhideWhenUsed="false" Name="Medium Shading 1 Accent 2"/ UnhideWhenUsed="false" Name="Medium Shading 2 Accent 2"/ UnhideWhenUsed="false" Name="Medium List 1 Accent 2"/ UnhideWhenUsed="false" Name="Medium List 2 Accent 2"/ UnhideWhenUsed="false" Name="Medium Grid 1 Accent 2"/ UnhideWhenUsed="false" Name="Medium Grid 2 Accent 2"/ UnhideWhenUsed="false" Name="Medium Grid 3 Accent 2"/ UnhideWhenUsed="false" Name="Dark List Accent 2"/ UnhideWhenUsed="false" Name="Colorful Shading Accent 2"/ UnhideWhenUsed="false" Name="Colorful List Accent 2"/ UnhideWhenUsed="false" Name="Colorful Grid Accent 2"/ UnhideWhenUsed="false" Name="Light Shading Accent 3"/ UnhideWhenUsed="false" Name="Light List Accent 3"/ UnhideWhenUsed="false" Name="Light Grid Accent 3"/ UnhideWhenUsed="false" Name="Medium Shading 1 Accent 3"/ UnhideWhenUsed="false" Name="Medium Shading 2 Accent 3"/ UnhideWhenUsed="false" Name="Medium List 1 Accent 3"/ UnhideWhenUsed="false" Name="Medium List 2 Accent 3"/ UnhideWhenUsed="false" Name="Medium Grid 1 Accent 3"/ UnhideWhenUsed="false" Name="Medium Grid 2 Accent 3"/ UnhideWhenUsed="false" Name="Medium Grid 3 Accent 3"/ UnhideWhenUsed="false" Name="Dark List Accent 3"/ UnhideWhenUsed="false" Name="Colorful Shading Accent 3"/ UnhideWhenUsed="false" Name="Colorful List Accent 3"/ UnhideWhenUsed="false" Name="Colorful Grid Accent 3"/ UnhideWhenUsed="false" Name="Light Shading Accent 4"/ UnhideWhenUsed="false" Name="Light List Accent 4"/ UnhideWhenUsed="false" Name="Light Grid Accent 4"/ UnhideWhenUsed="false" Name="Medium Shading 1 Accent 4"/ UnhideWhenUsed="false" Name="Medium Shading 2 Accent 4"/ UnhideWhenUsed="false" Name="Medium List 1 Accent 4"/ UnhideWhenUsed="false" Name="Medium List 2 Accent 4"/ UnhideWhenUsed="false" Name="Medium Grid 1 Accent 4"/ UnhideWhenUsed="false" Name="Medium Grid 2 Accent 4"/ UnhideWhenUsed="false" Name="Medium Grid 3 Accent 4"/ UnhideWhenUsed="false" Name="Dark List Accent 4"/ UnhideWhenUsed="false" Name="Colorful Shading Accent 4"/ UnhideWhenUsed="false" Name="Colorful List Accent 4"/ UnhideWhenUsed="false" Name="Colorful Grid Accent 4"/ UnhideWhenUsed="false" Name="Light Shading Accent 5"/ UnhideWhenUsed="false" Name="Light List Accent 5"/ UnhideWhenUsed="false" Name="Light Grid Accent 5"/ UnhideWhenUsed="false" Name="Medium Shading 1 Accent 5"/ UnhideWhenUsed="false" Name="Medium Shading 2 Accent 5"/ UnhideWhenUsed="false" Name="Medium List 1 Accent 5"/ UnhideWhenUsed="false" Name="Medium List 2 Accent 5"/ UnhideWhenUsed="false" Name="Medium Grid 1 Accent 5"/ UnhideWhenUsed="false" Name="Medium Grid 2 Accent 5"/ UnhideWhenUsed="false" Name="Medium Grid 3 Accent 5"/ UnhideWhenUsed="false" Name="Dark List Accent 5"/ UnhideWhenUsed="false" Name="Colorful Shading Accent 5"/ UnhideWhenUsed="false" Name="Colorful List Accent 5"/ UnhideWhenUsed="false" Name="Colorful Grid Accent 5"/ UnhideWhenUsed="false" Name="Light Shading Accent 6"/ UnhideWhenUsed="false" Name="Light List Accent 6"/ UnhideWhenUsed="false" Name="Light Grid Accent 6"/ UnhideWhenUsed="false" Name="Medium Shading 1 Accent 6"/ UnhideWhenUsed="false" Name="Medium Shading 2 Accent 6"/ UnhideWhenUsed="false" Name="Medium List 1 Accent 6"/ UnhideWhenUsed="false" Name="Medium List 2 Accent 6"/ UnhideWhenUsed="false" Name="Medium Grid 1 Accent 6"/ UnhideWhenUsed="false" Name="Medium Grid 2 Accent 6"/ UnhideWhenUsed="false" Name="Medium Grid 3 Accent 6"/ UnhideWhenUsed="false" Name="Dark List Accent 6"/ UnhideWhenUsed="false" Name="Colorful Shading Accent 6"/ UnhideWhenUsed="false" Name="Colorful List Accent 6"/ UnhideWhenUsed="false" Name="Colorful Grid Accent 6"/ UnhideWhenUsed="false" QFormat="true" Name="Subtle Emphasis"/ UnhideWhenUsed="false" QFormat="true" Name="Intense Emphasis"/ UnhideWhenUsed="false" QFormat="true" Name="Subtle Reference"/ UnhideWhenUsed="false" QFormat="true" Name="Intense Reference"/ UnhideWhenUsed="false" QFormat="true" Name="Book Title"/ /* Style Definitions */ table.MsoNormalTable {mso-style-name:????; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.5pt; mso-bidi-font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-font-kerning:1.0pt;} ????,RMAN?Oracle?????????????????????,?RMAN?????????????????,?????????????? ?????,RMAN????? RMAN???????????? RMAN???/?????????? ???????????? ????1487262.1???????????,?????RMAN??/????????4??????: ???? ???? ???? ??????? ???????????????,???????SQLPLUS???,???????????“DD-MON-RR HH24:MI:SS”???????,??????????? ??: SQL>spool monitor.out SQL>@monitor '06-aug-12 16:38:03' ?????RMAN???????????,?????????,?????? - ???????????????????,?????RMAN?????? ???????4??????????????? ???? ??DBA????????V$SESSION_LONGOPS???????????????????????,?????????????????? ??: SID CH CONTEXT SOFAR TOTALWORK % Complete --- -- ------- ------ ---------- ---------- 16 t1 1 181950 1186752 15.33 148 t2 1 249722 422400 59.12 ??: - ???????????????? - ??????????????? ???? ??????RMAN?????????????????????????????????????????????????????????Oracle???????????????????????? ??: SID CH SEQ# EVENT STATE SECONDS --- -- ---- --------------------------------- ------- ------- 16 t1 5735 RMAN backup & recovery I/O WAITING 10 143 8200 SQL*Net message from client WAITING 258.83 148 t2 7941 Backup: MML create a backup piece WAITING 196.13 ?????????T2???????????????,???????T2????????????????? ??: -?CH??????RMAN???,?Rman???????????,????????? -??SEQ#?????????,???????? -?????????,??????SEQ#???? -????????????????RMAN backup & recovery I/O'??????????????IO???? ???? ???????????????????????????????,???????backup_tape_io_slaves=TRUE,?????????????????? ??: SID CH STATUS OPEN_TIME SOFAR Mb TOTMB IO_COUNT % Complete TYPE FILENAME --- -- ----------- ------------------ -------- ------ ---------- -------- ------ ------------- 19 t1 FINISHED 02-aug-12 17:28:42 567.5 567.5 569 100.00 INPUT users01.dbf 19 t1 IN PROGRESS 02-aug-12 17:28:42 3489.99 8704 3490 40.10 INPUT sh.dbf 19 t1 IN PROGRESS 02-aug-12 17:28:42 3778 15113 OUTPUT kvnhlb22_1_1 20 t2 FINISHED 02-aug-12 17:28:38 740 740 742 100.00 INPUT system01.dbf 20 t2 FINISHED 02-aug-12 17:28:38 880 880 882 100.00 INPUT sysaux01.dbf 20 t2 FINISHED 02-aug-12 17:28:38 1680 1680 1682 100.00 INPUT undotbs01.dbf 20 t2 FINISHED 02-aug-12 17:28:38 3007.25 12029 OUTPUT l0nhlb23_1_1 ??: - ???????????????,??RMAN??????IO,??????????IO??,??(Document 360443.1 RMAN Backup Performance) - ?? IO_COUNT??????????? ??????? ?????,????????, ????????????v$backup_sync_io ?????????. ??: SID CH FILENAME TYPE STATUS BSZ BFC OPEN IO_COUNT --- -- ------------ ------ ----------- ------ --- ------------------ -------- 16 t1 ksnhla1b_1_1 OUTPUT IN PROGRESS 262144 4 02-aug-12 17:12:20 1092 148 t2 ktnhla1c_1_1 OUTPUT IN PROGRESS 262144 4 02-aug-12 17:12:15 2968 ??: -?????????????????,??RMAN??????IO -?? IO_COUNT?????????? -??IO_COUNT ????, ???IO_COUNT ????????????,???????????????,????????????? ????: ??????????????? Document 1487262.1 Script to monitor RMAN Backup and Restore Operations Document 144640.1   RMAN: Monitoring Recovery Manager Jobs Document 360443.1   RMAN Backup Performance Document 740911.1   RMAN Restore Performance ??,?????My Oracle Support Database Backup and Recovery community ?Oracle?????????????/??????

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  • Getting problem while capturing image through web cam in Java -OpenCV code.

    - by Chetan
    Hi.. I am developing Face detector using OpenCV library in java... I have written sample code for this,but it is giving Error while capturing image. can any one help please. Here is the code import java.awt.; import java.awt.event.; import java.awt.image.MemoryImageSource; import hypermedia.video.OpenCV; @SuppressWarnings("serial") public class FaceDetection extends Frame implements Runnable { ///Main method. public static void main(String[] args) { //System.out.println( "\nOpenCV face detection sample\n" ); new FaceDetection(); } // program execution frame rate (millisecond) final int FRAME_RATE = 1000/30; OpenCV cv = null; // OpenCV Object Thread t = null; // the sample thread // the input video stream image Image frame = null; // list of all face detected area Rectangle[] squares = new Rectangle[0]; //** Setup Frame and Object(s). FaceDetection() { super( "Face Detection" ); // OpenCV setup cv = new OpenCV(); //cv.capture(1, 1, 100); cv.capture( 320, 240 ); cv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT ); // frame setup this.setBounds( 100, 100, cv.width, cv.height ); this.setBackground( Color.BLACK ); this.setVisible( true ); this.addKeyListener( new KeyAdapter() { public void keyReleased( KeyEvent e ) { if ( e.getKeyCode()==KeyEvent.VK_ESCAPE ) { // ESC : release OpenCV resources cv.dispose(); System.exit(0); } } } ); // start running program t = new Thread( this ); t.start(); } // Draw video frame and each detected faces area. public void paint( Graphics g ) { // draw image g.drawImage( frame, 0, 0, null ); // draw squares g.setColor( Color.RED ); for( Rectangle rect : squares ) g.drawRect( rect.x, rect.y, rect.width, rect.height ); } @SuppressWarnings("static-access") public void run() { while( t!=null && cv!=null ) { try { t.sleep( FRAME_RATE ); // grab image from video stream cv.read(); // create a new image from cv pixels data MemoryImageSource mis = new MemoryImageSource( cv.width, cv.height, cv.pixels(), 0, cv.width ); frame = createImage( mis ); // detect faces squares = cv.detect( 1.2f, 2, OpenCV.HAAR_DO_CANNY_PRUNING, 20, 20 ); // of course, repaint repaint(); } catch( InterruptedException e ) {;} } } } Error while starting capture : device 0

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  • How to pass a serialized object to appengine java task?

    - by aloo
    Hi all, I'm using java appengine and the task queue API to run async tasks. I would like to add a task to the task queue but pass a a java object as a parameter. I notic the task options api can add a parameter as a byte[] but I'm unsure how to use it. 1) How would I serialize my object to a byte[]? and 2) How would the task read the byte[] and reconstruct the original object? Thanks.

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  • How to distribute java components for developers to use?

    - by coder
    I am not sure how to put the correct title. but here is the brief explanation. With Microsoft .NET, i created a server side custom control using C# to be used in ASP.NET pages. I distribute the DLL generated as a component. developers will include that and use in their ASP.NET project. Likewise, how can i do for Java based web components for to use with JSP or JSF or any other java web frameworks?

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  • Can I write an Android app in Java and convert it later?

    - by JT
    I've got a lot of experience in Java but none developing mobile apps. I'd like to write an application using Java/Swing and then convert it for use on an Android phone. Is this feasible or do I really need to develop from the ground up for the Android platform? I don't own an Android phone as I can't afford one at the moment, and the Android emulator is so slow that I find myself wasting a lot of time sitting around waiting.

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  • Does Java have an equivalent to .NET resource (.resx) files for localization?

    - by frankadelic
    Does Java have an equivalent to .NET resource (.resx) files for localization? In .NET, you can define resources as key-value pairs within a standard XML document. The resource files are named according to the culture. For example: myresources.resx myresources.en-us.resx myresources.fr-fr.resx myresources.de-de.resx Is there an equivalent in Java? Are the similar naming conventions used for files?

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  • What should be the ideal number of parallel java threads for copying a large set of files from a qua

    - by ukgenie
    What should be the ideal number of parallel java threads for copying a large set of files from a quad core linux box to an external shared folder? I can see that with a single thread it is taking a hell lot of time to move the files one by one. Multiple threads is improving the copy performance, but I don't know what should be the exact number of threads. I am using Java executor service to create the thread pool.

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  • Are there reasons why the java/spring/hibernate stack aren't popular in the web 2.0 space?

    - by Blankman
    I am really impressed with the java/spring/hibernate stack, and really want to dive in. Just curious, why are so many people using rails when java/spring/hibernate are tried and true? I guesss its because of the convention over configuration and time to launch? (spring has really gone the annotation route so less xml though). I realize this is subjective, but just looking for some thoughts on this.

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  • Can I someone point to me what I did wrong? Trying to map VB to Java using JNA to access the library

    - by henry
    Original Working VB_Code Private Declare Function ConnectReader Lib "rfidhid.dll" () As Integer Private Declare Function DisconnectReader Lib "rfidhid.dll" () As Integer Private Declare Function SetAntenna Lib "rfidhid.dll" (ByVal mode As Integer) As Integer Private Declare Function Inventory Lib "rfidhid.dll" (ByRef tagdata As Byte, ByVal mode As Integer, ByRef taglen As Integer) As Integer Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim desc As String desc = "1. Click ""Connect"" to talk to reader." & vbCr & vbCr desc &= "2. Click ""RF On"" to wake up the TAG." & vbCr & vbCr desc &= "3. Click ""Read Tag"" to get tag PCEPC." lblDesc.Text = desc End Sub Private Sub cmdConnect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdConnect.Click If cmdConnect.Text = "Connect" Then If ConnectReader() Then cmdConnect.Text = "Disconnect" Else MsgBox("Unable to connect to RFID Reader. Please check reader connection.") End If Else If DisconnectReader() Then cmdConnect.Text = "Connect" End If End If End Sub Private Sub cmdRF_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdRF.Click If cmdRF.Text = "RF On" Then If SetAntenna(&HFF) Then cmdRF.Text = "RF Off" End If Else If SetAntenna(&H0) Then cmdRF.Text = "RF On" End If End If End Sub Private Sub cmdReadTag_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdReadTag.Click Dim tagdata(64) As Byte Dim taglen As Integer, cnt As Integer Dim pcepc As String pcepc = "" If Inventory(tagdata(0), 1, taglen) Then For cnt = 0 To taglen - 1 pcepc &= tagdata(cnt).ToString("X2") Next txtPCEPC.Text = pcepc Else txtPCEPC.Text = "ReadError" End If End Sub Java Code (Simplified) import com.sun.jna.Library; import com.sun.jna.Native; public class HelloWorld { public interface MyLibrary extends Library { public int ConnectReader(); public int SetAntenna (int mode); public int Inventory (byte tagdata, int mode, int taglen); } public static void main(String[] args) { MyLibrary lib = (MyLibrary) Native.loadLibrary("rfidhid", MyLibrary.class); System.out.println(lib.ConnectReader()); System.out.println(lib.SetAntenna(255)); byte[] tagdata = new byte[64]; int taglen = 0; int cnt; String pcepc; pcepc = ""; if (lib.Inventory(tagdata[0], 1, taglen) == 1) { for (cnt = 0; cnt < taglen; cnt++) pcepc += String.valueOf(tagdata[cnt]); } } } The error happens when lib.Inventory is run. lib.Inventory is used to get the tag from the RFID reader. If there is no tag, no error. The error code An unexpected error has been detected by Java Runtime Environment: EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0b1d41ab, pid=5744, tid=4584 Java VM: Java HotSpot(TM) Client VM (11.2-b01 mixed mode windows-x86) Problematic frame: C [rfidhid.dll+0x141ab] An error report file with more information is saved as: C:\eclipse\workspace\FelmiReader\hs_err_pid5744.log

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