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  • use of system.exit(0)

    - by Warrior
    public class WrapperTest { static { print(10); } static void print(int x) { System.out.println(x); System.exit(0); } } In the above code System.exit(0) is used to stop the program. What argument does that method take? Why do we gave it as 0. Can anyone explain the concept?Thanks.

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  • Why an object declared in method is subject to garbage collection before the method returns?

    - by SiLent SoNG
    Consider an object declared in a method: public void foo() { final Object obj = new Object(); // A long run job that consumes tons of memory and // triggers garbage collection } Will obj be subject to garbage collection before foo() returns? UPDATE: Previously I thought obj is not subject to garbage collection until foo() returns. However, today I find myself wrong. I have spend several hours in fixing a bug and finally found the problem is caused by obj garbage collected! Can anyone explain why this happens? And if I want obj to be pinned how to achieve it? Here is the code that has problem. public class Program { public static void main(String[] args) throws Exception { String connectionString = "jdbc:mysql://<whatever>"; // I find wrap is gc-ed somewhere SqlConnection wrap = new SqlConnection(connectionString); Connection con = wrap.currentConnection(); Statement stmt = con.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY); stmt.setFetchSize(Integer.MIN_VALUE); ResultSet rs = stmt.executeQuery("select instance_id, doc_id from crawler_archive.documents"); while (rs.next()) { int instanceID = rs.getInt(1); int docID = rs.getInt(2); if (docID % 1000 == 0) { System.out.println(docID); } } rs.close(); //wrap.close(); } } After running the Java program, it will print the following message before it crashes: 161000 161000 ******************************** Finalizer CALLED!! ******************************** ******************************** Close CALLED!! ******************************** 162000 Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: And here is the code of class SqlConnection: class SqlConnection { private final String connectionString; private Connection connection; public SqlConnection(String connectionString) { this.connectionString = connectionString; } public synchronized Connection currentConnection() throws SQLException { if (this.connection == null || this.connection.isClosed()) { this.closeConnection(); this.connection = DriverManager.getConnection(connectionString); } return this.connection; } protected void finalize() throws Throwable { try { System.out.println("********************************"); System.out.println("Finalizer CALLED!!"); System.out.println("********************************"); this.close(); } finally { super.finalize(); } } public void close() { System.out.println("********************************"); System.out.println("Close CALLED!!"); System.out.println("********************************"); this.closeConnection(); } protected void closeConnection() { if (this.connection != null) { try { connection.close(); } catch (Throwable e) { } finally { this.connection = null; } } } }

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  • microsoft.office.server.search.query not found

    - by Lalit
    I have added reference to my application of Microsoft.Office.Server as well as Microsoft.Sharepoint . but while importing the namespace in program , there is no option like microsoft.office.server.search.query after microsoft.office.server.search. I am getting their Microsoft.Office.Server.Search.PortalCrawl;. Why this is?? please guide me.

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  • Convert html/css print media display to .doc with appropriate page breaks?

    - by DevelopingChris
    I'm looking to export a page that looks good in print media, to word. Can this be done automatically, or mostly automatically with office apis? The alternative is to create a program that reads all our style meta data and font meta data and convert to word and force a download. The issue is our style metadata is already built for css, its a web app after all. And writing my own css parser, doesn't sound like a good use of time.

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  • Reading Excel files from C#

    - by dbkk
    Is there a free or open source library to read Excel files (.xls) directly from a C# program? It does not need to be too fancy, just to select a worksheet and read the data as strings. So far, I've been using Export to Unicode text function of Excel, and parsing the resulting (tab-delimited) file, but I'd like to eliminate the manual step.

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  • How to split long commands over multiple lines in PowerShell

    - by asgerhallas
    How do you take a commmand like this in PowerShell and split it across multiple lines: &"C:\Program Files\IIS\Microsoft Web Deploy\msdeploy.exe" -verb:sync -source:contentPath="c:\workspace\xxx\master\Build\_PublishedWebsites\xxx.Web" -dest:contentPath="c:\websites\xxx\wwwroot\,computerName=192.168.1.1,username=administrator,password=xxx"

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  • How to setup Hessian Kit in iPhone existing projects

    - by Shikhar
    Hello Can any one help me to find out, how I can setup Hessian Kit on existing iPhone project. What are the steps required to run a simple hello world program. I have Hessian Kit (http://sourceforge.net/projects/hessiankit/) but don't know how I can include this in my existing project. Please help Thanks SD

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  • how to remove ConcurrentModificationException

    - by maverick
    what is this exception and how to remove this in my problem i am creating an arraylist of objects, and after checking some condition,i want to remove some objects. but the program is giving this exception ConcurrentModificationException. how to remove this thanks in advance

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  • Starting to learn C#

    - by cf_PhillipSenn
    After watching the tier 1 video, where do I go to learn how to program in C#? Is there an online video series? Usually people say to "Read the Manual", but what is a manual these days? Do I just say "Help", "View Help" and start grokking?

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  • winsock component

    - by Oghenero
    i have a winsock component made with vb.net in a class library that has events. how do i make it appear in tool box if i reference the dll in another project.? How do i use it in my c# program? thanks

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  • java array manipulation

    - by sachin
    Hi, I'm a beginner in java. I want the logic of the small program. I have two arrays array = {a1,a2,a3,a4,a5,,,,,,,,,an} and array2 = {b1,b2,b3,b4,,,,,,,,,,,bn} I want string as: a1b1,a2a3b2b3,a4a5a6b4b5b6,..........an Please tell me what will be the logic.

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  • Linux - specific API reference

    - by Goofy
    Hello! Where can I find centralized and complete documentation aboput Linux - specific API? I'm preparing Linux port of my application and i want to use as much Linux - specific features as it's possible. So far I found that Linux provide epoll and inotify API, which are great news for me, because my program works as network server and monitor local file systems.

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  • Does AOL have a contacts api?

    - by wingoo
    In their dev site,AOL says the contacts api would coming soon from the year 2008-_- but I can't find anything about it since then, and I find in window live add contacts site: http://cid-7b76c1c8e1ade1ea.profile.live.com/connect/ They have a program to port contacts from AOL, that is this only for Microsoft. Is there another method to do this?

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  • When is the onPreExecute called on an AsyncTask running parallely or concurrently?

    - by Debarshi Dutta
    I am using Android HoneyComb.I need to execute some tasks parallely and I am using AsyncTask's public final AsyncTask executeOnExecutor (Executor exec, Params... params) method.In each separate thread I am computing some values and I need to store then in an ArrayList.I must then sort all the values in the arrayList and then display it in the UI.Now my question is if one of the thread gets completed earlier than the other then will it immediately call the onPostExecute method or onPostExecute method will be called after all the background threads have been completed?MY program implementation depends on what occurs here.

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  • Does this have to be released?

    - by NextRev
    I've done a lot of research on when it's correct to release things, but it's all confusing to me. I think sometimes the Leaks program is off. Anyway... background is a UIImageView background.image = [UIImage imageNamed:@"greenbackground.png"]; Do I have to release background? I never alloced it and it's not set as a property, so I'm thinking no.

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  • VB no install of .net

    - by Neb
    Hi, I have a vb app working now but many users have complained to me that it requires .net library installed. Is there a way to bundle it with my program without having a seperate exe?

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  • JSON documentation standard?

    - by Tina
    Is there a recognized, recommended, or standard form for representing the structure of JSON? E.g., my service returns a structure, effectively, represented as JSON. How do I describe what my service returns, such that another service can consume that JSON and program to its interface?

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  • Is there a definitive guide for special folders in windows?

    - by the-locster
    Is there a definitive guide for special folders in windows? An internet search yielded just a few crumbs of information, e.g. Wikipedia:Special Folders Windows 7 Client Software Logo Program What I'm looking for is an explanation of each folder, its intended purpose, usage scenarios and motivation for its existence (e.g. what does Local App settings provide for that App settings doesn't). A matrix/table of requirements/uses against folder would be handy I think.

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