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I have a UISegmentedControl whose "Value changed" event is wired up in Interface Builder to call my controller's -(IBAction)segmentChangeAction:(id)sender; When the user taps on the control to change the selected segment, as expected segmentChangeAction is called whether in iOS4 or iOS5. When I programmatically change the selected segment through segmentedControl.selectedSegmentIndex = newIndex; , on iOS4 segmentChangeAction is called and the segment reflects the new selection. However on iOS5 segmentChangeAction is not called, yet the segment does reflect the new selection. Is this a change in iOS5? Is there anything I can do to get segmentChangeAction called on iOS5 when I programmatically change the selection?

I want to know can we turn on/off the GPS programmatically in iPhone?

I just learned about Java's Scanner class and now I'm wondering how it compares/competes with the StringTokenizer and String.Split. I know that the StringTokenizer and String.Split only work on Strings, so why would I want to use the Scanner for a String? Is Scanner just intended to be one-stop-shopping for spliting?

I want to record the time using System.currentTimeMillis() when a user begins something in my program. When he finishes, I will subtract the current System.currentTimeMillis() from the start variable, and I want to show them the time elapsed using a human readable format such as "XX hours, XX mins, XX seconds" or even "XX mins, XX seconds" because its not likely to take someone an hour. What's the best way to do this?

I think the title sums it up. I just want to know why one or the other is better for continous integration builds of Java projects from Svn.

I'm using a static code block to initialize some controllers in a regsitry I have. My question is therefore, can I guarantee that this static code block will only absolutely be called once when the class is first loaded? I understand I cannot guarantee when this code block will be called, Im guessing its when the Classloader first loads it. I realize I could synchronize on the class in the static code block, but my guess is this is actually what happens anyway? Simple code example would be; class FooRegistry { static { //this code must only ever be called once addController(new FooControllerImpl()); } private static void addController(IFooController controller) { // ... } } or should I do this; class FooRegistry { static { synchronized(FooRegistry.class) { addController(new FooControllerImpl()); } } private static void addController(IFooController controller) { // ... } }

I have an existing application which does all of its logging against log4j. We use a number of other libraries that either also use log4j, or log against Commons Logging, which ends up using log4j under the covers in our environment. One of our dependencies even logs against slf4j, which also works fine since it eventually delegates to log4j as well. Now, I'd like to add ehcache to this application for some caching needs. Previous versions of ehcache used commons-logging, which would have worked perfectly in this scenario, but as of version 1.6-beta1 they have removed the dependency on commons-logging and replaced it with java.util.logging instead. Not really being familiar with the built-in JDK logging available with java.util.logging, is there an easy way to have any log messages sent to JUL logged against log4j, so I can use my existing configuration and set up for any logging coming from ehcache? Looking at the javadocs for JUL, it looks like I could set up a bunch of ...