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Difference between Covariance & Contra-variance
...is very similar. The difference is that C# uses definite site variance and Java uses call site variance. So the way things vary is the same, but where the developer says "I need this to be variant" is different. Incidentally, the feature in both languages was in part designed by the same person!
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Android Json and null values
...: http://developer.android.com/reference/org/json/JSONObject.html#isNull%28java.lang.String%29
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Was PreferenceFragment intentionally excluded from the compatibility package?
...nd looking at the code at http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/4.0.1_r1/android/preference/PreferenceFragment.java?av=h -- creating my own PreferenceFragment isn't going to happen. It appears the liberal use of package-private in PreferenceManager ins...
How to color System.out.println output? [duplicate]
How can I color Java output?
13 Answers
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What's the best way to get the current URL in Spring MVC?
... Thanks for the reminder about the listener. I'm still new to Spring (and Java web development in general). I'm now using your code in combination with Spring Security's UrlUtils. Works like a charm.
– Koraktor
Sep 29 '09 at 8:41
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How can I use getSystemService in a non-activity class (LocationManager)?
...e in which you are using it? i.e. it is a receiver class, fragment, simple java class or any other.
– Maddy
Aug 4 '14 at 17:58
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Calling virtual functions inside constructors
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−1 "is dangerous", no, it's dangerous in Java, where downcalls can happen; the C++ rules remove the danger through a pretty expensive mechanism.
– Cheers and hth. - Alf
Aug 14 '16 at 10:47
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Understanding the difference between Object.create() and new SomeFunction()
I recently stumbled upon the Object.create() method in JavaScript, and am trying to deduce how it is different from creating a new instance of an object with new SomeFunction() , and when you would want to use one over the other.
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How do you input commandline argument in IntelliJ IDEA?
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What if I wanna use a redirect symbol? For example, $ javac Filter WhiteList.txt < TotalList.txt, how can I run this in Intellij just like command lines?
– Wulfric Lee
Sep 9 '16 at 1:26
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How to activate “Share” button in android app?
...ITY_NEW_TASK);
startActivity(intent)
}
} catch (e: java.lang.Exception) {
e.printStackTrace()
toast("Error")
}
}
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