34 Archived Topics
Remove Filter  | Hi Guys. I knw what I want to achieve but not how to achieve it! Any hints would be gratefuly received, or, if it's not possible, tell me so I can stop trying. I have an internet connection -> router with NAT, DHCP etc -> LAN with all kinds of …  |
| | Hi Guys. I'm getting bored, and so I'm looking at Python for a new challenge. I hoped to be able to use my Java NetBeans IDE to avoid an IDE learning curve, but it seems that NetBeans support for Python died years ago. So, all you Python gurus... what do …  |
| | At the risk of making a total fool of myself... I got very excited when I discovered that Java's "only opaque rectangular windows" limitation has been removed. Full release is intended for Java 7, but working methods can be accessed thru com.sun.awt.AWTUtilities in recent releases of Java 6 (I'm using … |
| | I'm asking this question in the context of a satellite internet service with expensive download limits... If you just accept all the recommended updates for Windows 10 (creator's update, security etc) for a single Home Edition machine how many Gigabytes will that represent in a typical 12 month period? Eg: … |
| | OK, so I'm gereatric and have fading eyesight, but light typeface in light grey on white? Serioudsly: constructive requests vfor the topics summary page: 1. Show the name of the OP 2. Bring back the click to go straight to the laest post in a topic 3. Use sensible colours …  |
| | Praises be to the gods! Just when I thought all hope was lost, not just one but two proper Java questions. Maybe the road to recovery starts here?  |
| | Hi Guys. This is a seemingly simple problem that's got me stuck, so I'd be very grateful for any ideas you can offer. I'm working on a program that has to display fixed nodes and the links between them. The links are uni-directional, but often pairs of nodes have two …  |
| | Hi all you php buffs. Out of simple curiosity I thought I would take a look at php. I've been programing since I joined IBM as a trainee developer in 1969, so I have some familiarity with programming in (eg) 360 assembler, APL. PL/I, ... , Smalltalk, Java, Swift. (I … |
| | Dani: Out of curiosity I tried clicking the RollBar ads in Programming and in Community Center.. When I clicked the one at the top of the page it just refreshed the page but without that ad. When I clicked the one half way down it just refreshed my window. I … |
| | This is a little discussion/example of design for modularity and re-use, inspired by javaAddict and Orlando Augusto posts in their thread “Dynamic Multidimensional Array Printing” https://www.daniweb.com/programming/software-development/code/305580/dynamic-multidimensional-array-printing That thread has 3 solutions to printing the contents of a multi-dimensional array of arbitrary dimensions - although in fact all the solutions will … |
| | This class is intended as a small and simple alternative to java.util.Scanner for people in the early stages of learning Java. Unlike Scanner it has built-in error handling and retry, it throws no checked exceptions, is as tolerant as possible of variations in the format of user input, and avoids …  |
| | Assertnull and I have cooked up a little Java utility that we think will be useful for early-stage beginners, and I'm planning to post it for anyone to use. Is there some preferred short copyright/ownership/licence statement that I should include at the start of the code? I know that Daniweb … |
| | I'm looking for an algorithm, pseudocode or any langauge, to generate random numbers with the following characteristics: integer values in the range 0-n lower values much more likely to happen than higher values, eg prob of 0 is n/(n(n-1)), prob of n is 1/(n(n-1)) - linear relationship between value and …  |
| | I've opened this thread following rotten69's suggestion for "Java projects for beginners". To get things started I've posted a project in a format that makes sense to me; please feel free to follow that format, or to do it in some completely different style if that seems better. Let's see … |
| | [This article](http://lifehacker.com/the-top-programming-languages-ranked-by-job-demand-po-1601752302) will give you at least one good reason...  |
| | Although layout managers usually scale text properly, with the spread of "retina" Macs with screen resolutions over 200 d.p.i. we can't just keep ignoring pixel size for grahics or animation. Toolbox has a method for getting the screen resolution, but I don't have access to enough varied machines to see …  |
| | This is my 10,000th post in the DaniWeb Java forum. so I hope I won't get an infraction for being off-topic. I just thought this would be the perfect opportunity to thank all the people who have helped to make this such a valuable and rewarding experience for me. I …  |
| | I have a bizarre thing just happened in NetBeans - the red error markers on the LHS of the editor window have all vanished. There are still errors - the files are flagged as having errors, and the errors are correctly diagnosed when I do a clean/rebuild, but no error … |
| | I know this is going to be really simple, and I'm going to look like a fool when someone answers it, but... I'm tryingto replace any occurrenxe of any of these characters - ?_ with a * in a String I start with replaceAll("[ _-]", "*"); and all is well … |
| | I'm suffering from a complete brainfreeze here; maybe some NetBeans user can un-block me without making me look like a complete idiot? Thanks. I usually use Eclipse, but for this particular project it has to be NetBeans. I have two projects defined. One is the main project with packages - … |
| | Java SE JRE 7 update 21 is now available, with fixes for dozens of security-related issues. Immediate installation is highly recommended. Head on over to Oracle's Java download page and grab it now. There is also a version for Java 6 users, if any such animals still exist.  |
| | Here's a simple thing that I can't find a simple solution for - so any suggestions will be very welcome... I have a `Map<String, MyClass>` and if it has more than 1 entry I let the user pick a MyClass instance by displaying the keys. No problem there. If it … |
| | Just a quick heads-up, especially for anyone using Java in their web browser. There's a "widely exploited" vulnerability in Java that could allow bypassing normal security when a Java applet is run silently upon visiting a web site. (ie It's a bad one). Users are being widely advised to disable …  |
| | Hello all. I'm currrently working on a GUI that needs to support dragging some application-specific objects from a selection area onto a work area (JPanel). It's currently working in a "click where to place the object, then click the Add button" mode, but that's not good enough. The obvious approach … |
| | I'm curious. Why is so much code in this forum formatted like this [CODE]if (something) { do something } else { do another thing }[/CODE] rather than [CODE]if (something) { do something } else { do another thing }[/CODE] The first version is harder to read and takes up more … |
| | Like me you may be curious about the "closures" or "lambda expressions" that were supposed to be in Java 7 and are now the centre-piece of Java 8 (due next year). Also like me you may have Googled for some info, and discovered a smattering of technical articles explaining the … |
| | What (if anything) is the difference between these two? [CODE]String[] sa = {"ABC"}; String[] sa = new String [] {"ABC"};[/CODE] |
| | The sort methods for collections specifies that the parameter must be a collection of objects that implement Comparable for their own class or superclass, eg [CODE]public static <T extends Comparable<? super T>> void sort(List<T> list)[/CODE] Can anyone tell me how to define an ArrayList that will only accept such objects? …  |
| | Just a heads-up guys. I had JRE update 26 pushed onto client machines yesterday and it broke an important client-server app. This point release changes the serialVersionUID for ImageIcon. The app in question sends images from the server to the cients via a simple writeObject/readObject, which fails at the client … |
| | Hi y'all. I'm looking for feedback and discussion on the use of annotations to eliminate the boilerplate code for linking buttons and methods. Hopefully this will be especially useful in RAD or rapid prototyping environments. Over the weekend I hacked together a little proof of concept that supports two ways … |
| | I have a problem involving Generics. Here's a simplified version: Suppose I have a generic method to add a new element to a (possibly empty) ArrayList, like this: [CODE]<T> void addNewTo(ArrayList<T> list)[/CODE] What I need to do is to determine the correct class for the ArrayList elements so as to … |
| | Suns Java style rules specify that accessors should follow the getX/setX pattern, and most Java API mathods follow this... except for some very common exceptions such as: String length() enum name() [NB new to 1.5, not a legacy!] ArrayList size() etc It seems that there is another pattern operating here: … |
| | OK, I'm obviously going bonkers here, but has something happened to the java code tags? Why doesn't this work in preview mode? [CODE=java] i++; [/CODE] |
| | Here's a question for those of you who have experience of fixing or enhancing other people's Java code, which I hope will also be really useful for those in the early stages of learning programming. Please contribute! If you've looked at other people's code, you will know that sinking feeling … |
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