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Checking if a string is empty or null in Java [duplicate]
...ge Apache Commons StringUtils.isEmpty(str), which checks for empty strings and handles null gracefully.
Example:
System.out.println(StringUtils.isEmpty("")); // true
System.out.println(StringUtils.isEmpty(null)); // true
Google Guava also provides a similar, probably easier-to-read method: Stri...
Importing two classes with same name. How to handle?
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You can omit the import statements and refer to them using the entire path. Eg:
java.util.Date javaDate = new java.util.Date()
my.own.Date myDate = new my.own.Date();
But I would say that using two classes with the same name and a similiar function is usual...
target=“_blank” vs. target=“_new”
What's the difference between <a target="_new"> and <a target="_blank"> and which should I use if I just want to open a link in a new tab/window?
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File.separator vs FileSystem.getSeparator() vs System.getProperty(“file.separator”)?
...idden by calls to System.setProperty(String key, String value) or with command line parameters -Dfile.separator=/
File.separator gets the separator for the default filesystem.
FileSystems.getDefault() gets you the default filesystem.
FileSystem.getSeparator() gets you the separator character for ...
Why are trailing commas allowed in a list?
I am curious why in Python a trailing comma in a list is valid syntax, and it seems that Python simply ignores it:
5 Answer...
How do I use a compound drawable instead of a LinearLayout that contains an ImageView and a TextView
.... It came up with a lot of good suggestions, but this one I cannot understand.
4 Answers
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How to retrieve the hash for the current commit in Git?
...rev-parse --short HEAD
Sidenote: If you want to turn references (branches and tags) into SHA-1, there is git show-ref and git for-each-ref.
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Google Maps API v3: Can I setZoom after fitBounds?
...he addListenerOnce method... that way, you don't have to save the listener and manually remove it, as the method will take care of that for you.
– Matt Diamond
Jan 16 '11 at 20:43
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How do I parse XML in Python?
I have many rows in a database that contains XML and I'm trying to write a Python script to count instances of a particular node attribute.
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Most efficient way to cast List to List
... be declared as taking a List<? extends BaseClass>.
But if it isn't and you can't change it, you can wrap the list with Collections.unmodifiableList(...), which allows returning a List of a supertype of the argument's parameter. (It avoids the typesafety problem by throwing UnsupportedOperati...