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Why is using a wild card with a Java import statement bad?
...ported. It's not just a problem when upgrading Java versions. Also - if an API is designed well, it should never break existing code on upgrade. The only time I needed to change code when upgrading java versions was because of import-on-demand and when Sun pulled the XML APIs into the java runtime.
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How to set a Timer in Java?
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@ErnestasGruodis The core APIs list the constructor as public: docs.oracle.com/javase/7/docs/api/java/util/Timer.html#Timer() You might have a different Timer class in your classpath - try java.util.Timer as the class.
– andrewmu...
What is the benefit of using Fragments in Android, rather than Views?
...n developing for Android , you can set your target (or minimum) sdk to 4 (API 1.6) and add the android compatibility package (v4) to add support for Fragments . Yesterday I did this and successfully implemented Fragments to visualize data from a custom class.
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How to determine whether code is running in DEBUG / RELEASE build?
...tically at run time? I want to enable a button that switches to production APIs. On that button, I want to change DEBUG to 0 and display the message that user needs to restart the app. So next time it will use production APIs.
– Hiren Prajapati
Jan 3 '18 at 6:1...
What is JSONP, and why was it created?
...script');
script.type = 'text/javascript';
script.src = 'http://www.someWebApiServer.com/some-data';
You will end up with a script segment that looks like this after it loads the data:
<script>
{['some string 1', 'some data', 'whatever data']}
</script>
However this is a bit inconve...
Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
... There's a setProps: facebook.github.io/react/docs/component-api.html#setprops
– Marius
Oct 3 '14 at 17:46
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JPA getSingleResult() or null
...esult() indicates it can't be found. Personally I can't stand this kind of API. It forces spurious exception handling for no real benefit. You just have to wrap the code in a try-catch block.
Alternatively you can query for a list and see if its empty. That doesn't throw an exception. Actually sinc...
Binding a list in @RequestParam
...upVal.
Then calling the service with the list of params is as simple as:
API_URL?groupVal=kkk,ccc,mmm
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Android WebView style background-color:transparent ignored on android 2.2
...eloper Options -> Force GPU Rendering" to get transparency to work with API level 10.
– Aki
Aug 28 '12 at 21:57
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Possible heap pollution via varargs parameter
...te the heap, the compiler just can't prove it. Previously, callers of such APIs would get annoying warnings that were completely pointless but had to be suppressed at every call site. Now the API author can suppress it once at the declaration site.
However, if the method actually is not safe, users...