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  • java classcast exception

    - by shil
    hi i have problems in converting an XML document type into a Document object.. this is the piece of code line 1 : Document doc=null; line 2 : doc = (Document) parser.parse(sourceFile); for this line 2 it throws java classcast exception.. without the typecast it shows error as "Type mismatch: cannot convert from org.w3c.dom.Document to javax.swing.text.Document" how do i now typecast properly? any suggestions??

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  • Wrapper class for HttpGet / Post in Java?

    - by Tim Green
    Hi, Sorry, I'm quite new to Java. I've stumbled across HttpGet and HttpPost which seem to be perfect for my needs, but a little long winded. I have written a rather bad wrapper class, but does anyone know of where to get a better one? Ideally, I'd be able to do String response = fetchContent("http://url/", postdata); where postdata is optional. Thanks!

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  • Checking for a null int value from a Java ResultSet

    - by ian_scho_es
    In Java I'm trying to test for a null value, from a ResultSet, where the column is being cast to a primitive int type. int iVal; ResultSet rs = magicallyAppearingStmt.executeQuery(query); if (rs.next()) { if (rs.getObject("ID_PARENT") != null && !rs.wasNull()) { iVal = rs.getInt("ID_PARENT"); } } From the code fragment above, is there a better way to do this, and I assume that the second wasNull() test is redundant? Educate us, and Thanks

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  • MapReduce programming system in java-actionscript

    - by eco_bach
    Just finished reading ch23 in the excellent 'Beautiful Code' http://oreilly.com/catalog/9780596510046 on Distributed Programming with MapReduce. I understand that MapReduce is a programming system designed for large-scale data processing problems, but I have a hard time getting my head around the basic examples given and how I might apply them in real world situations. Can someone give a simple example of MapReduce implemented using either java, javascript or actionscript?

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  • Java - Incrementing through IP addresses in String format

    - by Matt
    I'm new to java and i'm trying to find a way of incrementing through an user input IP address range. For example from 192.168.0.1 to 192.168.0.255. However the way my application works at the moment is the take the from and to ip addresses as a String. Is there a way I can increment through all the ip addresses the user input from and to? Hope this makes sense and please dont flame me, I have looked for an answer!

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  • Java - get index of key in HashMap?

    - by llm
    In java if I am looping over the keySet() of a HashMap, how do I (inside the loop), get the numerical index of that key? Basically, as I loop through the map, I want to be able to get 0,1,2...I figure this would be cleaner than declaring an int and incrementing with each iteration. Thanks.

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  • Need some help with GUI in java

    - by james1
    Hi guys, i'm working on GUI in java and got stuck with move the object. Please visit this youtube video i made a short demo for you guys to see what i was trying to do. I'm so new to the GUI thing as i've never been taught of doing GUI. Here is the link: http://www.youtube.com/watch?v=up1LV5r-NSg

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  • converting webpage into jpeg image using java

    - by ravi
    I am building a web application, in Java, where i want the whole screenshot of the webpage, if i give the URL of the webpage as input. The basic idea i have is to capture the display buffer of the rendering component..I have no idea of how to do it.. plz help..

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  • how set vertical marquee in java application?

    - by Arivu2020
    Hi, I am creating one application in java using swing.In that i have an array of String, I try to use html marquee tag to scroll all the strings one by one from top to bottom.But the marquee tag doesn't support in the panel. How can i acheive it.Can any one suggest me? Thanks in advance

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  • How to add days to a date in Java

    - by terrific
    I want to add days to a date to get a new date in Java. How to achieve it using the Calender class. Calender dom = new GregorianCalender(d, m y); is the instance of my date of manufacture and I want to reach to date of expiry adding some 100 days to the current date and store it in doe but unable to do that. Any help would be appreciable.

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  • Java: Calculate distance between a large number of locations and performance

    - by Ally
    I'm creating an application that will tell a user how far away a large number of points are from their current position. Each point has a longitude and latitude. I've read over this article http://www.movable-type.co.uk/scripts/latlong.html and seen this post http://stackoverflow.com/questions/837872/calculate-distance-in-meters-when-you-know-longitude-and-latitude-in-java There are a number of calculations (50-200) that need carried about. If speed is more important than the accuracy of these calculations, which one is best?

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  • Batch Create Java Class Stubs

    - by user344639
    Given a list of potential class names: 1. Alaska . . . 50. Wyoming Is there a tool that will create empty java class files for each with supplied parameters? I'm thinking of something like the "New...Class" dialog in Eclipse, only on steriods. :-) Thanks in advance, Kyle

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  • Why and what for: java enum

    - by Mat Banik
    Today I was browsing through some question on this site and I found mention of enum being used in singleton pattern and that there are some thread safety benefits to such solution. I never used enums and I have been programing in java for more than couple a years now. And apparently they changed a lot and now they even do full blown support of OOP within them selfs. Now why and what for should I used enum in day to day programing?

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