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  • Wait For Return Key Press Using Java Scanner

    - by Gordon
    What would be the best way to wait for a return key press from the user using the Java Scanner Class? In a command line tool I would like the user to confirm before carrying out an action. Please correct me if there a more standard way of doing this in a command line tool.

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  • Resize form objects in Java

    - by PeerFull
    I have a Java applet, which is a form that draw shapes into it (Rect, Oval, Line). Each shape is represented by 2 points and can draw itself to the form. When the JApplet form resizes, I need to resize the shapes also while keeping the aspect ratio. I didn't find an high quality solution for doing this that solves this problem. Tried to write a solution from this, but it came up as lousy when tested, Can someone publish an example code for doing that please?

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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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  • parsing JSON in java ?

    - by bukuai
    How to parsing JSON in java? { "code": 100, "message": "SUCCESS", "result": { "list": [ { "cardNumber": "ALUFZZ5SZ1Q5", "expireTime": 1270742400, "surplusThreshold": 4, "uid": 771292, "useTime": 1270214375, "wareId": 1145 }, { "cardNumber": "ALUFZZ5SZ1QD", "expireTime": 1270828800, "surplusThreshold": 7, "uid": 784289, "useTime": 1270302200, "wareId": 1145 }, { "cardNumber": "ALUFZZ5SZ1RC", "expireTime": 1270828800, "surplusThreshold": 10, "uid": 773664, "useTime": 1270300871, "wareId": 1145 }, { "cardNumber": "ALUFZZ5SZ1UM", "expireTime": 1270828800, "surplusThreshold": 10, "uid": 779560, "useTime": 1270282841, "wareId": 1145 }, { "cardNumber": "ALUFZZ5SZ1VT", "expireTime": 1270656000, "surplusThreshold": 2, "uid": 754099, "useTime": 1270106775, "wareId": 1145 } ], "pageCount": 61, "pageIndex": 2, "pageSize": 5, "recordCount": 308 } }

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  • Is Java worth learning in my late fourties?

    - by bobi
    Hi guys. First I want to say is that I am 37 years old and not from programer background (actualy from biology). And my question is should I start learning java? I have coded in php and javascript for a year and a half. Every answer would be appreciated Thanks in advance Bobi.

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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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  • Creating an invisible button in Java Swing

    - by AniDev
    Hello, I have seen many times on Java Swing GUIs buttons that look like images until the mouse rolls over them. They appear to not have their content area filled. When the mouse rolls over them, the content area fills in but the button looks as though the mouse is not hovering over it. An example of this would be the toolbar of buttons used to activate each demo in SwingSet2. How is this effect possible? Thanks!

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  • Do you find java.util.logging sufficient?

    - by Yuval A
    Per the title, do you find the default Java logging framework sufficient for your needs? Do you use alternative logging services such as log4j or others? If so, why? I'd like to hear any advice you have regarding logging requirements in different types of projects, and when integrating frameworks is actually necessary and/or useful.

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  • How to capture video from webcam(in java)?

    - by user243680
    I want to develop an application in java to capture video from webcam and store it onto a particular location.Can anyone provide me the working code? What type(usb,ip etc..) of webcam is the best in order to develop the application. Please help me. how to proceed?

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  • Problem in java.util.Set.addAll() method

    - by Yatendra Goel
    I have a java.util.Set<City> cities and I need to add cities to this set in 2 ways: By adding individual city (with the help of cities.add(city) method call) By adding another set of cities to this set (with the help of cities.addAll(anotherCitiesSet) method call) But the problem in second approach is that i don't know whether there were any duplicate cities in the anotherCitiesSet. I want to do some processing whenever a duplicate entry is tried to be entered in thecities set.

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  • Java Packages in Seperate repository than others

    - by sethxian
    I was wondering if it's possible to have a java package setup using a different subversion repository than the rest. Ideally, I would probably go with a different library project, but in the case of BlackBerry, the 3rd party library linking does not work well, so I would like to just separate my UI package into a different repository than the rest so that I can control the UI better for different OS versions, but leave all the other packages the same. Is this possible?

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  • Equivalent of IllegalArgumentException of Java in C++

    - by vito
    In Java if an input argument to a method is invalid, we can throw an IllegalArgumentException (which is of type RuntimeException). In C++, there is no notion of checked and unchecked exceptions. Is there a similar exception in standard C++ which can be used to indicate a runtime exception? Or is there a common style not in the standard but everyone follows in practice for a situation like this? Or, should I just create my own custom exception and throw it?

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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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  • Replacement for java.util.zip for streaming usage?

    - by evilfred
    java.util.zip sucks for stream compression. The longer you leave an Inflator/Deflator open without calling end(), the more native memory it uses up. This is a known issue: http://bugs.sun.com/view_bug.do?bug_id=4797189 which nobody seems to care about fixing. What is a good alternative? Preferably one that is free and is still actively supported by its developers.

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