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How do I programmatically determine operating system in Java?
...ix() // and so on
}
That way, every time you ask for the Os, you do not fetch the property more than once in the lifetime of your application.
February 2016: 7+ years later:
There is a bug with Windows 10 (which did not exist at the time of the original answer).
See "Java's “os.name” for W...
Difference between await and ContinueWith
...running on a thread pool thread... at which point you can't access the UI, etc.
– Jon Skeet
Sep 23 '13 at 19:59
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How to send an object from one Android Activity to another using Intents?
...an one field to retrieve from a given Parcel, you must do this in the same order you put them in (that is, in a FIFO approach).
Once you have your objects implement Parcelable it's just a matter of putting them into your Intents with putExtra():
Intent i = new Intent();
i.putExtra("name_of_extra",...
How can you represent inheritance in a database?
... belongs to. Won't you still have to do a JOIN with all of the subtypes in order to get all of the policy details?
– Adam
Mar 7 '16 at 20:26
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How to get the current date/time in Java [duplicate]
...te / time in a form that allows you to access the components (year, month, etc) numerically, you could use one of the following:
new Date() gives you a Date object initialized with the current date / time. The problem is that the Date API methods are mostly flawed ... and deprecated.
Calendar.get...
Detect blocked popup in Chrome
...as been loaded. Or else it might be when everything (images, outboard CSS, etc.) has been loaded. You could test this easily by adding a very large graphic to the popup (clear your cache first!). If you were using a Javascript Framework like jQuery (or something similar), you could use the ready() e...
Get the name of an object's type
...stanceof Boolean // false
The literals need to be wrapped in an Object in order for instanceof to work, for example
new Number(3) instanceof Number // true
The .constructor check works fine for literals because the . method invocation implicitly wraps the literals in their respective object type
3...
Version of SQLite used in Android?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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How can I set the focus (and display the keyboard) on my EditText programmatically
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I had to do this in order to get it showing up in onResume(). Without the delay, nothing would happen using every single solution described in this thread.
– FranticRock
Dec 13 '16 at 18:17
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Which characters are valid/invalid in a JSON key name?
...ings like the Unicode null character (U+0000, plain "null byte" in UTF-8), etc? The both json.org and the linked official/formal ECMA specification PDF seem to imply that yes, those are valid in JSON, even in their literal forms (not just in the \u four-hex-digits form).
– mtra...