What files does this code need?

I am trying to use this code from Java Examples In A Nutshell.
It is a short program that involves reading one and writing to another (I think!) The way I understand things is that there has to be two files for the program to be able to run, from_file & to_file . I have attempted to creat two txt files and saved them as these names in the same folder as the app. The code complies as you would expect, when I try to run it I get Usage: FileCopy <source> <destination> and the app never runs. I suspect I have not created the external files properly. If you can see where I have gone wrong let me know, layman's terms please, Dave.

When running the compiled "FileCopy.class" with java command you must enter the names of files, i.e.;
java FileCopy "from_file" "to_file"
in the command line.
In this case args[0] is "from_file" and args[1] is "to_file."

Similar Messages

  • What files does this code need part II?

    This is a continuation of a question asked earlier today http://forum.java.sun.com/thread.jsp?forum=54&thread=321833 . I now have been able to run this app & it seems okay. But I am confused as I expected the to_file to be overwritten by the from_file.
    However when I check text files they appear to be the same as they were at first. Why? Dave.

    Try again after deleting the "to_file" or use another name for the output file.

  • What function does this code do?

    ((l = html.indexOf("<META")) != -1)

    I guess your question is not directed at the indexOf method of the String object, which returns the position of the String passed to the method within the String on which the methode is executed, with 0 being the position of the first character in a String and a negativ value indicating, that the String passed is not included at all.
    Rather your question is regarding the
    ((l=html.indexOf("...."))!=-1)
    This is a construct you will find fairly often in java .
    The = operator assigns the value returned by html.indexOf("...") to the variable l . The term (l=html.indexOf("....")) itself returns the value of l (that is the point that you were asking for). This value is then compared with != (meaning not equal) to -1.
    This is often used in conditions (and loops) to retrieve the value of something assign it to a variable (which can be used later on) and compare it to something else.

  • I have just tried to sync my iphone. Error message saying it cannot be synced has popped up quoting error code (-50). I have just removed old iphone backups from itunes but was very careful to not delete the current one. What does this code mean?

    Hi there,
    I have just tried to sync my iphone.
    Worryingly an error message saying it cannot be synced has popped up quoting error code (-50)
    I have just removed old iphone backups from itunes but was very careful to not delete the current one
    What does this code mean?

    http://support.apple.com/kb/TS1583

  • What does " this code must be redeemed in the Australian storefront " mean? And how can I fix it?

    What does " this code must be redeemed in the Australian storefront " mean? And can I fix it?

    All iTunes gifts and gift cards are country-specific, they can only be redeemed and used in their country of issue. Are you in Australia with an Australian billing address on your account ? If you are then try going to the bottom of the Featured tab in the App Store app on your iPad and tap on your account id, tap on 'View Apple ID' on the popup and log into your account, and then select the Country/Region section and select Australia.
    If you are not in Australia then you won't be able to use it.

  • Whenever i try and send an imessage to someone that has an iphone it gets stuck at times and won't go through. I then have to send it as a basic text and then it will respond message failed to send what should i do when it does this i need help

    Whenever i try and send an imessage to someone that has an iphone it gets stuck at times and won't go through. I then have to send it as a basic text and then it will respond message failed to send what should i do when it does this i need help

    The use of iMessage depends on both the sender and the receiver having an active data connection. If either of the two connections are interrupted, the message can fail. The sending of an iMessage differs from the sending of an SMS, and if you are having SMS failures, that would be a carrier concern.

  • To what class does this method belong?

    If one sees in the documentation something like
    - (retType *) text1:(Type1 *)aType1 text2:(Type2 *)aType2;
    then to what class does this method belong? I do not see in the Objective-C documentation any way that one can tell without the 'context' in which the method is declared or defined. This makes reading the documentation very difficult (for me). What you see is not what you get. There is stuff missing.
    In my world there is no difficulty in determining the class to which a method belongs. It is stated explicitly in the method name. For example:
    PROCEDURE (self: MyClass) methodName (arg1: Type1; arg2: Type2);
    and one sees that 'methodName' belongs to 'MyClass'.
    In Objective-C how does one know the class to which a method belongs? Is it only determined by context, that is, by the fact that it is within the @implementation section or that it is within the @interface section? If that is the case then I would think that in documentation one should always be required to assert something like:
    <<MyClass>> -(retType *) text1:(Type1 *)aType1 ...
    -Doug Danforth

    PeeJay2,
    I think I now have the distinctions needed but still have a question about what you said. But first here is my current understanding. A "method" is by definition bound to *at least* one class whereas a "message" need not be bound to any class. Hence one can send any message to any class and it will either be handled or ignored. A message looks like a method signature (and maybe one but is not constrained to be one).
    The difference between C++ and Objective-C is that in C++ method calls are not messages sent to a receiver. They are just calls of the method for the dynamically bound object. That method must be syntactically correct at compile time whereas messages need not be syntactically correct for any receiver. At least that is my current understanding.
    Now my question. You state that "casting the receiver of a message will in no way alter the flow of the code". I attempted to test this with a simple program but ran into a problem (see my new posting "Multiple classes in one file?").
    Assume the following
    @class Child : Parent
    Child *child = [[Child alloc] init];
    Parent *parent = [[Parent alloc] init];
    Parent *bar;
    bar = child;
    [bar doSomething]; // (C) call to child's doSomething method?
    [(Parent *)bar doSomething]; // (P) call to parent's doSomething method?
    You comment seems to say that both case (C) and (P) give the same result. If they do then which result is it the parent's or the child's method (assuming that the child has indeed reimplemented the parent's method)? Have I understood you correctly?
    -Doug Danforth

  • Consolidate Masters - what exactly does this do?

    Hi all
    I am a relativity new aperture user. every time i import images from my camera, they have the little arrow in the bottom corner to show they are referenced files.
    I can fix this by clicking file>consolidate masters and choose to move or copy them.
    Forgive the basic-ness of this question, but what exactly does this do? And why can't i import them so they are not referenced files?
    thanks again for your help

    I suggest you read the manual for this sort of questions, but anyway, here's a quick answer:
    -consolidate masters moves or copies your images to somewhere withing your library, making them managed instead of referenced.
    -the import dialog, when you connect a card has the option to copy the files to anywhere on your disk, to pictures or to the library (making them managed, and thus not showing the little arrow).
    For the advantages and disadvantages of either, check this forum or again, the manual.
    j

  • What previlege does user HR need to run a scheduler?

    What previlege does user HR need to run a scheduler?
    conn system;
    BEGIN
      DBMS_SCHEDULER.create_schedule (
        schedule_name   => 'add_partition_hourly_schedule',
        start_date      => SYSTIMESTAMP,
        repeat_interval => 'freq=hourly; byminute=0',
        end_date        => NULL,
        comments        => 'Repeats hourly,on the hour,for ever.');
    END;
    grant execute on add_partition_hourly_schedule to hr;
    grant execute on add_partition_hourly_schedule to hr
    Error on the line 1:
    ORA-27487: SCHEDULE invalid object previlege.

    pls, check doc: http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_sched.htm#i1010076
    >
    Usage Notes
    This procedure requires the CREATE JOB privilege to create a schedule in one's own schema or the CREATE ANY JOB privilege to create a schedule in someone else's schema by specifying schema.schedule_name. Once a schedule has been created, it can be used by other users. The schedule is created with access to PUBLIC. Therefore, there is no need to explicitly grant access to the schedule.

  • When attempting to install add-ons, Firefox generates a message saying it is unable to install add-on because Firefox cannot modify the necessary file. To what file is this referring, and how do I fix this problem?

    When I download an add-on such as Colorful Tabs and start the installation process, I receive a message that Firefox cannot install the add-on because it cannot modify the necessary file. To what file is this referring?

    That is usually caused by Firefox not unpacking the extension.
    You can try to set the Boolean pref <b>extensions.alwaysUnpack</b> to <i>true</i> on the <b>about:config</b> page.
    To open the <i>about:config</i> page, type <b>about:config</b> in the location (address) bar and press the "<i>Enter</i>" key, just like you type the url of a website to open a website.<br />
    If you see a warning then you can confirm that you want to access that page.<br />
    *Use the Filter bar at to top of the about:config page to locate a preference more easily.
    *Preferences that have been modified show as bold (user set).
    *Preferences can be reset to the default via the right-click context menu if they are user set
    *Preferences can be changed via the right-click context menu: Modify (String or Integer) or Toggle (Boolean)

  • I'm trying to sync/back-up apps on my iPhone 3G and iTunes keeps telling me it can't complete the operation because "the apps on my iPhone cannot be determined." What the **** does this mean?!

    I'm trying to sync/back-up apps on my iPhone 3G and iTunes keeps telling me it can't complete the operation because "the apps on my iPhone cannot be determined." What the **** does this mean?!

    Same problem. Wish I knew.
    When I tried to Restore, I got an Error 13xx and it won't even do that.
    not a happy camper if a phone this expensive stops working in 2 years.

  • HT201210 My iPhone became wet at the beach.  I put it in rice for 4 days.  When I connect to itunes, it says the phone must be restored.  It starts and then gives either the error 2001, or 2006.  What exactly does this mean, and is it worth getting repair

    My iPhone became wet at the beach.  I put it in rice for 4 days.  When I connect to itunes, it says the phone must be restored.  It starts and then gives either the error 2001, or 2006.  What exactly does this mean, and is it worth getting repaired?
    Thank you...

    http://support.apple.com/kb/TS1275
    Water damage isn't covered by warranty, but you could always purchase a refurbished device from Apple. 

  • For h.264 encoding, what size does the project need to be to avoid black bars on the top and bottom.

    For h.264 encoding, what size does the project need to be to avoid black bars on the top and bottom. I am exporting the mp4 to Brightcove.

    Hi there,
    Which version of Adobe Captivate (If it is Adobe Captivate) is it and which Operating System is it?
    Thanks.

  • HT2534 what country does this work for? no such caption as none on the paying option

    what country does this work for? no such caption as none on the paying option

    As far as I am aware it works for all countries. You are following the instructions on that page exactly e.g. it's a new account that you are trying to create and you are selecting a free app in the store and clicking on 'create Apple id' when 'buying' it ?

  • Contest: Guess whats wrong with this code!

    Can you guess whats wrong with this code snippet? Perhaps its too easy...
    private void clearDefaultTableModel( DefaultTableModel dtm) {    
            int  rowCount  = dtm.getRowCount();
            for(int i =0;  i < rowCount; i++) {
                dtm.removeRow(i);  
        }- Karl XII

    Can you guess whats wrong with this code snippet?
    Perhaps its too easy...
    private void clearDefaultTableModel(
    DefaultTableModel dtm) {    
    int  rowCount  = dtm.getRowCount();
    for(int i =0;  i < rowCount; i++) {
    dtm.removeRow(i);  
    it should be
    private void clearDefaultTableModel(DefaultTableModel dtm) {    
       int  rowCount  = dtm.getRowCount();
       for(int i =0;  i < rowCount; i++) {
         dtm.removeRow(0);  
    }or another way
    private void clearDefaultTableModel(DefaultTableModel dtm) {    
      while(dtm.getRowCount()>0){
         dtm.removeRow(0);  

Maybe you are looking for

  • How to manage different supply parameters for the same item based on demand quantity?

    We are using unconstrained ASCP.  We have some products that can be produced in a 'small' machine or can be produced in a large tank.  If ASCP has created a planned order for a quantity less than 1000 it will be made on the small machine with the sup

  • Hard Drive Partition not recognized

    I have a brand new hard drive with 3 partitions on it. fdisk displays all of the partitions on sdb but only 2 of them show up in /dev. [benine@comp ~]$ ls /dev | grep sd sda sda1 sda2 sda3 sda4 sdb sdb1 sdb2 [benine@comp ~]$ sudo fdisk -l Disk /dev/s

  • BPM Dynamic Roles

    Hi All, I am trying to figure out how I can dynamically assign roles within BPM. So I want to be able to route the BPM process to the manager of the user that the process was assigned. I am just not sure how to dynamically do this within BPM. Any tho

  • How to set default value in OAMessageLovInputBean?

    Hi, How to set default value in OAMessageLovInputBean while loading the page? I have tried the following code but its not working. public void processRequest(OAPageContext pageContext, OAWebBean webBean) super.processRequest(pageContext, webBean); St

  • Safari after 3.2.1 update keeps crashing

    Hi, i updated to 3.2.1 [i had no problems at all with previous verision] and safari keeps crashing almost imidately. I figured out that browsing just in one tab is ok. But as soon as i open anything in second or i just CMD click on some link safari c