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  • Is null a class in java?

    - by Somerandomeguy
    According to, http://www.freshvanilla.org:8080/display/www/Java+Interview+Questions Under, Which class is the superclass of every class? null seems to be the answer. I found that new Object().getClass().getSuperClass() verifies the answer as correct. But can null be considered a class? I see all primitive data types are represented as Class objects from java[dot]sun.com/j2se/1.4.2/docs/api/java/lang/Class.html

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  • Google App Engine datastore-primary key

    - by megala
    Hi, I've created a table in the Google App Engine Datastore. It contains the following FIELDS(GROUPNAME,GROUPID,GROUPDESC). How do I set GROUPID as the primary key? My code is as follows: @Entity @Table(name="group" , schema="PUBLIC") public class Creategroup { @Basic private String groupname; @Basic private String groupid; @Basic private String groupdesc; public void setGroupname(String groupname) { this.groupname = groupname; } public String getGroupname() { return groupname; } public void setGroupid(String groupid) { this.groupid = groupid; } public String getGroupid() { return groupid; } public void setGroupdesc(String groupdesc) { this.groupdesc = groupdesc; } public String getGroupdesc() { return groupdesc; } public Creategroup(String groupname, String groupid, String groupdesc ) { // TODO Auto-generated constructor stub this.groupname = groupname; this.groupid = groupid; this.groupdesc = groupdesc; } }

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  • After Repo sync, there are no files int he directory.

    - by taranfx
    I've setup a new Repo for Android source code, and after executing the repo sync, there are no files in the repo directory. Did I miss something? I used: repo init -u git://android.git.kernel.org/platform/manifest.git repo initialized in /home/tarandeep/code/Android repo sync ... It downloaded GBs of data (I can confirm via network monitor) and then nothing appeared in the Android directory.

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  • HTML Language question

    - by Mike
    Note my code below. I am trying to figure out why my data is not changing to Spanish. I understand it to be one line of code and that is all within the HTML attribute lang=”es”. Any help would be greatly appreciated. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xlmns="http://www.w3.org/1999/xhtml" lang=”es” xml:lang="en"> <head> <title>JavaJam Coffee House</title> <link href="javajam.css" rel="stylesheet" type="text/css" /> </head> <body bgcolor="brown"> <h1>JavaJam Coffee House</h1> <ul> <li>Specialty Coffee and Tea</li> <li>Bagels, Muffins, and Organic Snacks</li> <li>Music and Poetry Readings</li> <li>Usability Studies</li> <li>Open Mic Night</li> </ul> <br></br> <p>12312 Main Street<br> Mountain Home, CA 93923<br> 1-888-555-5555</br> </p> <p> <em> <small>Copyright &copy; 2008 JavaJam Coffee House</em></p> E-Mail <a href="mailto;[email protected]"> Michael J. Crawley</a> </body> </html>

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  • Multiple databases support in Symfony

    - by Ngu Soon Hui
    I am using Propel as my DAL for my Symfony project. I can't seem to get my application to work across two or more databases. Here's my schema.yml: db1: lkp_User: pk_User: { type: integer, required: true, primaryKey: true, autoIncrement: true } UserName: { type: varchar(45), required: true } Password: longvarchar _uniques: Unique: [ UserName ] db2: tesco: Id: { type: integer, required: true, primaryKey: true, autoIncrement: true } Name: { type: varchar(45), required: true } Description: longvarchar And here's the databases.yml: dev: db1: param: classname: DebugPDO test: db1: param: classname: DebugPDO all: db1: class: sfPropelDatabase param: classname: PropelPDO dsn: 'mysql:dbname=bpodb;host=localhost' #where the db is located username: root password: #pass encoding: utf8 persistent: true pooling: true db2: class: sfPropelDatabase param: classname: PropelPDO dsn: 'mysql:dbname=mystore2;host=localhost' #where the db is located username: root password: #pass encoding: utf8 persistent: true pooling: true When I call php symfony propel-build-model, only db1 is generated, db2 is not. Any idea how to fix this problem?

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  • Special functions in Matlab

    - by favala
    I'm trying to get a picture like the following: http://upload.wikimedia.org/wikipedia/en/e/e6/Airy-3d.svg What am I doing wrong? [x,y]=meshgrid(-1:.1:1,-1:.1:1); surf(x,y,(2*besselj(1,2*pi*sqrt(x.^2+ y.^2)/sqrt(x.^2+ y.^2)).^2) Also... kind of a side note, but if I used ndgrid instead of meshgrid here my x's and y's would switch right?

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  • Unfamiliar Javascript Syntax

    - by user1051643
    Long and short of the story is, whilst reading John Resig's blog (specifically http://ejohn.org/blog/javascript-trie-performance-analysis/) I came across a line which makes absolutely no sense to me whatsoever. Essentially it boils down to object = object[key] = something; (this can be found in the first code block of the article I've linked.) This has proven rather difficult to google, so if anyone can offer some insight / a good online resource for me to learn for myself, I'd much appreciate it.

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  • Enable clipboard functions in swf generated by pdf2swf.

    - by user515
    I am using pdf2swf (http://www.swftools.org/) to convert PDF's to .swf. I have written a flex application that loads the swf generated by pdf2swf. I want to enable select , copy and paste functions on the loaded swf. Is there a way to do this. Please note I am able to extract the text from the loaded swf using textSnapshot, which means the pdf2swf does not convert the text to shapes.

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  • EntityFramework: using association or add property manualy

    - by dritterweg
    I'm starting to use Entity Framework. Let's say I have to Entity from my tables in DB. Here is the table schema Profiles ProfileId FirstName LastName Hobbies Id HobbyName OwnerId So one profile can have many hobbies. My Entity Framework: ProfileEntity ProfileId FirstName LastName Hobbies (collection of HobbyEntity) note: this created by the Association tool HobbyEntity Id HobbyName Owner (type of ProfileEntity) note: this created by the Association tool, for me this property is not important my question: should I use the "Association" tool to make the relationship between the two entities, which in result create a property of each entity (in ProfileEntity will create a HobbyEntity and vica versa) or should I not use the association and only add a scalar property manually such as List<HobbyEntity> in my ProfileEntity and OwnerId in HobbyEntity.

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  • Secure xml messages being read from database into app.

    - by scope-creep
    I have an app that reads xml from a database using NHibernate Dal. The dal calls stored procedures to read and encapsulate the data from the schema into an xml message, wrap it up to a message and enqueue it on an internal queue for processing. I would to secure the channel from the database reads to the dequeue action. What would be the best way to do it. I was thinking of signing the xml using System.Security.Cryptography.Xml namespace, but is their any other techniques or approaches I need to know about? Any help would be appreciated. Bob.

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  • What is the best way to restore(rollback) data in an application to a specified state(date) ?

    - by panzerschreck
    Hello, An example would set the context right, the example below captures the various states of the entity, which needs to be reverted(rolled back) . State 1 - Recorded on 01-Mar-2010 Column1 Column2 Data1 0.56 State 2 - Recorded on 02-Mar-2010 Column1 Column2 Data1 0.57 State 3 - Recorded on 03-Mar-2010 Column1 Column2 Data1 0.58 User notices that state3 is not what he intended to be in, decides to revert back to state2. One approach that I can think of, without modifying the entity is via "auditing" all the inserts/updates, as below, the rollback information captures the data just before the updates/modifications on the entity, so that it can be applied in an order when you need to revert.Please note that changing the entity's schema, is not an option. Rollback - R1 recorded on 01-Mar-2010 Column1 Column2 Data1 0.56 Rollback - R2 Recorded on 02-Mar-2010 Column1 Column2 Data1 0.56 Rollback - R3 Recorded on 03-Mar-2010 Column1 Column2 Data1 0.57 So, to get to state2 , we would start with rollback information R1,apply R2 onto it. Is there a better approach to achieve this ? Thanks for your time.

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  • how do I integrate the aspnet_users table that comes with asp.net membership into my existing databa

    - by ooo
    i have a database that already has a users table COLUMNS: userID - int loginName - string First - string Last - string i just installed the asp.net membership table. Right now all of my tables are joined into my users table foreign keyed into the "userId" field How do i integrate asp.net_users table into my schema? here are the ideas i thought of: Add a membership_id field to my users table and on new inserts, include that new field in my users table. This seems like the cleanest way as i dont need to break any existing relationships. break all existing relationship and move all of the fields in my user table into the asp.net_users table. This seems like a pain but ultimately will lead to the most simple, normalized solution any thoughts?

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  • How to handle null response for json object

    - by user1494754
    I get a JSON response as { "edges": [], "nodes": [] } how to check if the objects has null values and handle the case?? JSONObject jobj = new JSONObject(line); JSONArray jArray = jobj.getJSONArray("edges"); if(jArray.length()!=0) { for(int i=0;i<jArray.length();i++){ JSONObject json_data = jArray.getJSONObject(i); x.add((float) json_data.getInt("x")); y.add((float) json_data.getInt("y")); end This retrurns me : org.json.JSONException: end of input at character 0 of

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  • Do compiled PHP scripts exist?

    - by dabito
    Hi, I am wondering if anyone has used or read about PHP scripts compiled as a .so extension for Apache... Thing is I think I remember reading about it somewhere but dont know if such a thing exists. This looks promising, but incomplete and abandoned: http://phpcompiler.org/ Im interested because i think it could improve performance... Perhaps someone could point out a framework or apache extension that does this. Thanks!!

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  • website and protocol restriction (firewall application)

    - by Smith
    Am developing a firewall application that is suppose to restrict website/protocols/webs directories system wide that i choose for example restrict login.domain.com, but not domain.com restrict domain.com/passport not domain.com restrict .tld types e.g .org pls give me some ideas? [edit] Am developing on the windows plat form , from win 2000 to win7, using any vb language vb6 upwards also i want to be able to block any protocol http ftp etc.

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  • Has anyone been able to install Retrospectiva on a Windows machine?

    - by H1Man
    I've been looking into some bug trackers and Retrospectiva seems like a good tool. However, I am having all sorts of trouble installing it on my machine. I followed the guide on their site (http://retrospectiva.org/tickets/357) but it hasn't helped much and there don't seem to be a lot of users on their site that work with Windows. I am wondering if any of the SO users have any experience working with Retrospectiva.

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