How to create a node in java.util.prefs.Preferences  -- Need Help !!

Hi All
I want to know the way of implementing a Node using java.util.prefs.Preferences , and need to store a value.
Your Help wil be greatly appreciated
best Regards
Madumm

http://java.sun.com/j2se/1.5.0/docs/api/java/util/prefs/Preferences.html

Similar Messages

  • Java.utils.prefs.Preferences API throws exception on Mac, not Windows

    This is a Mac-specific problem. Is it a bug, or am I misusing the java.utils.prefs.Preferences API?
    The Preferences flush() API call always throws a BackingStoreException if a system tree preferences root has been read. The system tree has not been modified or written to, but the flush() call is nevertheless throwing an exception. This occurs when running as a normal user without the ability to write to /Library/Preferences.
    See sample code below. Note that I only want to read the system prefs tree. The user tree write flush fails. If the system tree node is not created, the user flush() succeeds.
    Steps to Reproduce
    Delete any existing Java prefs files:
    ~/Library/Preferences/com.apple.java.util.prefs.plist
    ~/Library/Preferences/com.mycompany.prefstest
    /Library/Preferences/com.apple.java.util.prefs.plist
    /Library/Preferences/com.mycompany.prefstest
    Run the following Java code:
    package com.mycompany.prefstest;
    import java.util.prefs.BackingStoreException;
    import java.util.prefs.Preferences;
    public class PrefsTest {
          * @param args
         public static void main(String[] args) {
              String strKey1 = "com/mycompany/prefstest/one/two/three/four/key1";
              Preferences systemRoot = Preferences.systemRoot();
              Preferences userRoot = Preferences.userRoot();
              // Get a value for user prefs.
              String value1 = userRoot.get(strKey1, "missing");
              // Fall back to system prefs if it is not defined.
              if (value1.equals("missing"))
                   value1 = systemRoot.get(strKey1, "missing");
              System.out.println("key1 --> " + value1);
              // If still not defined, set a user-specific value
              if (value1.equals("missing"))
                   userRoot.put(strKey1, "value1");
                   try {
                        userRoot.flush();
                        System.out.println("flushed prefs successfully");
                   catch (BackingStoreException e)
                        System.out.println("Exception: " + e.toString());
    Expected Results
    Should produce the output:
    key --> missing
    flushed prefs successfully
    Actual Results
    Console output is
    key --> missing
    Exception: java.util.prefs.BackingStoreException: Synchronization failed for node '/'
    Notes
    $ java -version
    java version "1.6.0_29"
    Java(TM) SE Runtime Environment (build 1.6.0_29-b11-402-11D50b)
    Java HotSpot(TM) 64-Bit Server VM (build 20.4-b02-402, mixed mode)
    also tested with:
    java version "1.7.0_04-ea"
    Java(TM) SE Runtime Environment (build 1.7.0_04-ea-b16)
    Java HotSpot(TM) 64-Bit Server VM (build 23.0-b17, mixed mode)
    Mac OS X 10.7.3.
    The "Expected Results" are correctly obtained running the same code on MS-Windows.
    Running the jar as sudo works (with write access to /Library/Preferences), as expected.

    Just for fun, try a key without slashes in it (but for example dots if you must use such a long key).
    I say that because a quick Google search points out that Apple stores the preferences in a file hierarchy in the user home folder. I can already see how using keys which look like a file path are going to cause nuclear reactors to meltdown...

  • Java.util.pref.Preferences

    Hello Sir,
    Is java.util.pref.Preferences class support property file?
    Thanks for advance
    bala

    Read the API for Preferences.
    Typical implementations include flat files, OS-specific registries, directory servers and SQL databases. The user of this class needn't be concerned with details of the backing store.
    Does that answer your question?
    db

  • How can I create an instance of "java.util.prefs.WindowsPreferences"?

    Hi All,
    I was trying to find out a way to access the Windows Registry to add soome keys and and later add a string.
    I found WindowsPreferences might be useful in the above mentioned context.
    I was trying to create an instance of it, but when I import the class, it says it is invisible.
    Can anyone let me know how to instantiate this class.
    Note:- Under the same package "java.util.prefs" we have another class "Preferences", Iam able to import this one and use it in my code.
    Thank You.
    Regards,
    Suman.H

    It's true that Preferences uses the Registry on Windows systems, that does not mean you can use it as a Registry API. The only part of the Registry you can access are those branches that are set aside for java.util.prefs: HKLM\Software\JavaSoft\Prefs and HKCU\Software\JavaSoft\Prefs. IF you need to access other parts of the Registry, you'll need to use JNI or a separate Windows Registry library.

  • How to create a node with attributes at runtime in webdynpro for ABAP?

    Hi Experts,
             How to create a node with attributes at runtime in webdynpro for ABAP? What classes or interfaces I should use? Please provide some sample code.
    I have checked IF_WD_CONTEXT_NODE_INFO and there is ADD_NEW_CHILD_NODE method. But this is not creating any node. I this this creates only a "node info" object.
    I even check IF_WD_CONTEXT_NODE but i could not find any method that creates a node with attribute.
    Please help!
    Thanks
    Gopal

    Hi
       I am getting the following error while creating a dynamic context node with 2 attributes. Please help me resolve this problem.
    Note
    The following error text was processed in the system PET : Line types of an internal table and a work area not compatible.
    The error occurred on the application server FMSAP995_PET_02 and in the work process 0 .
    The termination type was: RABAX_STATE
    The ABAP call stack was:
    Method: IF_WD_CONTEXT_NODE~GET_STATIC_ATTRIBUTES_TABLE of program CL_WDR_CONTEXT_NODE_VAL=======CP
    Method: GET_REF_TO_TABLE of program CL_SALV_WD_DATA_TABLE=========CP
    Method: EXECUTE of program CL_SALV_WD_SERVICE_MANAGER====CP
    Method: APPLY_SERVICES of program CL_SALV_BS_RESULT_DATA_TABLE==CP
    Method: REFRESH of program CL_SALV_BS_RESULT_DATA_TABLE==CP
    Method: IF_SALV_WD_COMP_TABLE_DATA~MAP_FROM_SOURCE_DATA of program CL_SALV_WD_C_TABLE_V_TABLE====CP
    Method: IF_SALV_WD_COMP_TABLE_DATA~MAP_FROM_SOURCE of program CL_SALV_WD_C_TABLE_V_TABLE====CP
    Method: IF_SALV_WD_COMP_TABLE_DATA~UPDATE of program CL_SALV_WD_C_TABLE_V_TABLE====CP
    Method: IF_SALV_WD_VIEW~MODIFY of program CL_SALV_WD_C_TABLE_V_TABLE====CP
    Method: IF_SALV_WD_COMPONENT~VIEW_MODIFY of program CL_SALV_WD_A_COMPONENT========CP
    My code is like the following:
    TYPES: BEGIN OF t_type,
                CARRID TYPE sflight-carrid,
                CONNID TYPE sflight-connid,
             END OF t_type.
      Data:  i_struc type table of t_type,
      dyn_node   type ref to if_wd_context_node,
      rootnode_info   type ref to if_wd_context_node_info,
      i_node_att type wdr_context_attr_info_map,
      wa_node_att type line of wdr_context_attr_info_map.
          wa_node_att-name = 'CARRID'.
          wa_node_att-TYPE_NAME = 'SFLIGHT-CARRID'.
          insert wa_node_att into table i_node_att.
          wa_node_att-name = 'CONNID'.
          wa_node_att-TYPE_NAME = 'SFLIGHT-CONNID'.
          insert wa_node_att into table i_node_att.
    clear i_struc. refresh i_struc.
      select carrid connid into corresponding fields of table i_struc from sflight where carrid = 'AA'.
    rootnode_info = wd_context->get_node_info( ).
    rootnode_info->add_new_child_node( name = 'DYNFLIGHT'
                                       attributes = i_node_att
                                       is_multiple = abap_true ).
    dyn_node = wd_context->get_child_node( 'DYNFLIGHT' ).
    dyn_node->bind_table( i_struc ).
    l_ref_interfacecontroller->set_data( dyn_node ).
    I am trying to create a new node. That is
    CONTEXT
    - DYNFLIGHT
    CARRID
    CONNID
    As you see above I am trying to create 'DYNFLIGHT' along with the 2 attributes which are inside this node. The structure of the node that is, no.of attributes may vary based on some condition. Thats why I am trying to create a node dynamically.
    Also I cannot define the structure in the ABAP dictionary because it changes based on condition
    Message was edited by: gopalkrishna baliga

  • How to create Event Node in smartform

    Hi Experts,
    could you please tell me how to create event node in smartform
    Thanks in Advance,
    Thanks&Regards
    Geetha

    HI,
    plz explain your problem in deeply.
    And as per me you first create page and righ click on it
    Then create window as per your requirement.
    if you want to put condition ot events true or false Righ click on your window
    then goto flow logic -> Altenative
    You can found 2 events in Condition.
    So you can assign this events.If you want to put condition or event on test then goto Text here in General Attributes in bottom side you can find even on page.
    Try it.

  • How to create web services in java?

    Hi,
    I am a newbie to java webservices. Can anybody tell me how to create web services in java?
    Any tutorial link or step by step doc would be useful.
    Appreciate your help in this regard.
    Thanks in advance.
    naymo01.

    Creating web services in Java appears to depend highly upon the server you intend to use.
    Here's a tutorial: http://java.sun.com/webservices/docs/1.6/tutorial/doc/index.html

  • How to create new node in feature

    Dear Members,
    Culd any one help me out .........
    How to create new node in features..
    Example:  NUMKR
    On defaulting which option to select to create new node?
    Return value
    field for decision operation
    sub feature
    programme
    debugging operation
    error operation
    comment
    How to proceed................????????????

    hi,
    Where you can select the option field for decision operation then select the filed which you want like personal area, subarea, employee group and subgroup.
    and then select the node and then goto create and assign the return value by selecting the option ' Return value'.
    NUMKR -> FILED - PERSKGemployee group)  -> field PERSK(employee sub group) and --> return value.
    thanks,
    Vasu.

  • How to Create adf table from java bean

    Hi,
    How to Create adf table from java class (Not from ADF BC).
    Thanks
    Satya

    @vlsn -- you have to follow what shay said.
    Do the following in Model layer ::
    create a table property java class with your columns setters and getters like :
    *public class gridProps {*
    private int sno;
    private String orderNum;
    *public void setSno(int sno) {*
    this.sno = sno;
    *public int getSno() {*
    return sno;
    *public void setOrderNum(String orderNum) {*
    this.orderNum = orderNum;
    *public String getOrderNum() {*
    return orderNum;
    Create another table java class which will populate the values to your column values and return the collection :
    *public class gridPopulate {*
    private  List<gridProps> gridValues ;
    *public List<gridProps> setToGrid(ArrayList<ArrayList> valuesToSet) {*
    *if (valuesToSet == null) {*
    return gridValues;
    gridValues = new ArrayList<gridProps>();
    if(btnValue.equals("completeBtn"))
    return gridValues;
    for(ArrayList<String> tempArr:valuesToSet)
    gridProps gp = new gridProps();
    gp.setSno(Integer.valueOf(tempArr.get(0)));
    gp.setOrderNum(tempArr.get(1));
    return gridValues;
    Right click gridPopulate class and create this as data control.This class will be seen in Data control list.Under this data control,Drag the grid property collection(created earlier) to your page.Then execute your binding(gridPopulate) according to your logic.
    Thanks.(My jdev version 11.1.1.5.0)

  • How to run .jar on linux & how to create .jar file using java?

    hi, may i know how to run .jar on linux & how to create .jar file using java? Can u provide the steps on doing it.
    thanks in advance.

    Look at the manual page for jar:
    # man jar
    Also you can run them by doing:
    # java -jar Prog.jar

  • How to create sub domain using java ?

    how to create sub domain using java ?
    for example:
    name1.domainname.com
    name2.domainname.com
    is it possibe ?

    You don't do that using Java.
    Consult the documentation of the application server in question how to configure it. If you're using for example Tomcat 6.0, then you should be consulting this document: [http://tomcat.apache.org/tomcat-6.0-doc/virtual-hosting-howto.html].

  • How to create webservice in Webdynpro java

    Hi Experts,
          I need to develop one application in Visual Composer.Since VC doesn't support coding so i need to create Webservice in webdynpro java and use that webservice in VC.Can any one of you please suggest how to create Webservice in Webdynpro Java.
    Regards,
    Prasanna.

    Hi prasanna,
    Refer this links.
    /people/sridhar.k2/blog/2006/09/12/creating-and-exposing-bapi-as-web-service-and-using-it-in-web-dynpro
    BAPI Exposed as Web Service
    Connect R/3 from Java web application
    Web Dynpro integration with R/3
    http://help.sap.com/saphelp_nw04s/helpdata/en/82/6a0e7bbe744276bf393654b9b576ed/frameset.htm
    Regards,
    karthik.

  • How to create Short Lived process?..can neone pls help...

    How to create Short Lived process?..can neone pls help...

    Hi,
    Login into workbench. Click on Help->Workbench start page.
    Lot of helps are there you can go through them. They will be helpful.
    But it seems you are new to livecycle, so it will difficult to start through help. Either you can take help of any of your team member who is expert in livecycle or some training you should attend.
    Thanks

  • HT3630 How to creat an app-enabled accessories for iPhone? Please help me to get an answer..

    How to creat an app-enabled accessories for iPhone? Please help me to get an answer..

    To get hardware interfaces and API's via hardware you
    need to join the MFi program.  That info is here:
    https://developer.apple.com/programs/mfi/
    To get the additional software to be able to download
    and test code on any iDevice, you must join the
    iOS Developer Program.  That info is here:
    https://developer.apple.com/programs/ios/
    Both programs require fees and NDA agreements,
    especially hardware as most vendors that supply
    components development tools will not sell you any
    of their tools unless you are a member of the MFi
    program.

  • How to create a node-typed XmlValue from a String with Java?

    Hi all,
    It's already been a while since I'm trying to get how to construct a node-typed XmlValue from a String value but I keep getting different exceptions no matter what method I try.
    I started with the first way that came to my mind:
    XmlValue value = new XmlValue("<element/>"); //Even though the String represents a valid xml node, calling value.isString() returns true.
    then I thought ok, so I should maybe use the typed constructor:
    XmlValue value = new XmlValue(XmlValue.NODE, "<element/>"); //_It does not work either, calling value.isNull() returns true.
    I also tried with the rest of types (XmlValue.DOCUMENT, XmlValue.DOCUMENT_NODE, XmlValue.ELEMENT_NODE.....) and it did not work either with any of these.
    Fiinally I saw that you can construct a new XmlValue from a XmlDocument but I cannot get a XmlDocument unless I phisically create one, which obviously wont be a very good idea.
    So I'm definitely stuck with these, I would really appreciate if someone could tell me how to do this...
    Thanks in advance,
    Pablo Pareja
    PS: I'm using Berkeley dbxml 2.5.13

    Hi Pablo,
            XmlDocument doc = manager.createDocument();
            doc.setContent("<bla/>");
            XmlValue val = new XmlValue(doc);
            System.out.println(val.getType() == XmlValue.NODE);
            System.out.println(val.asString());Try this. It doesn't create physically (that is in the container) a document. The output of this piece of program:
    true
    <bla/>Hope it helps
    Vyacheslav

Maybe you are looking for