I have the following if statement: String newStr4 = strr.split(“2012”)[0]; if (newStr4.startsWith(“Mon”)) { str4.add(newStr4); } I want it to include startsWith Mon Tues Weds Thurs Friday etc. …
Prevent the keyboard from displaying on activity start
I have an activity with an Edit Text input. When the activity is initialized, the Android keyboard is shown. How can the keyboard remain hidden until the user focuses the input? Answer I think the following may work I’ve used it for this sort of thing before.
How to view all items of Errors under Problems View in Eclipse Editor
I had checked out a Project from Our CVS. When I tried to build it in Eclipse by adding some jars, it showed a lot of errors under the Problems View in Eclipse. It displayed nearly 12,000 errors, but …
How can this Java tree be 1000 x faster?
I am programming an AI for a chess-like game, based on two types of pieces on a 8 x 8 grid. I want to build a kind of minmax tree, which represents each possible move in a game, played by white players in first, and by black players in second. I have this generate() method which is call recursively. I
JUnit: testing helper class with only static methods
I am testing a helper class with only static methods with JUnit4 and Cobertura. Testing methods was easy task and is done already. However, cobertura shows that the class is not covered by tests completely, as it is not instantiated anywhere. I don’t want to create an instance of this class (it is a hel…
android – How to detect application being activated
When the app is launched, Application onCreate is called. How to detect when the app is brought to front from running in background? Answer Look for onResume() method. Its is always called when your app comes foreground. As per google docs: The foreground lifetime of an activity happens between a call to onRe…
why using volatile with synchronized block?
I saw some examples in java where they do synchronization on a block of code to change some variable while that variable was declared volatile originally .. I saw that in an example of singleton class where they declared the unique instance as volatile and they sychronized the block that initializes that inst…
How to understand whether it is going to exceed the Java Heap Size or not?
I implemented a program about calculating the stock values comparing that value in the given times’ values and etc.. I have a csv file which has all dates and double values. In my program for every single date, I’m openning a file, parsing and searching the value of the given date. And I may check…
Resolving javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed Error?
Edit : I tried to format the question and accepted answer in more presentable way at my blog. Here is the original issue. I am getting this error: detailed message sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find v…
Get domain name from given url
Given a URL, I want to extract domain name(It should not include ‘www’ part). Url can contain http/https. Here is the java code that I wrote. Though It seems to work fine, is there any better approach or are there some edge cases, that could fail. Input: http://google.com/blah Output: google.com A…