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Good Hash Function for Strings
... computinglife.wordpress.com/2008/11/20/… explaining why 31 was used for Java string hashing. There is no mathematical proof given, but it does explain the general concept as to why primes work better.
– Pharap
Sep 24 '13 at 0:39
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Logger slf4j advantages of formatting with {} instead of string concatenation
...ay instead. See e.g. http://slf4j.org/apidocs/org/slf4j/Logger.html#debug(java.lang.String, java.lang.Object[]).
Regarding the speed: Ceki posted a benchmark a while back on one of the lists.
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Getting attribute using XPath
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How could I get the value of lang (where lang=eng in book title), for
the first element?
Use:
/*/book[1]/title/@lang
This means:
Select the lang attribute of the title element that is a child of the first book child of the top element of the XML ...
Disabling contextual LOB creation as createClob() method threw error
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Which java version did you try this with? Intellij is unable to find this property.
– comiventor
Dec 6 '17 at 8:53
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How do I get whole and fractional parts from double in JSP/Java?
How do I get whole and fractional parts from double in JSP/Java ? If the value is 3.25 then I want to get fractional =.25 , whole = 3
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How to set selected value of jquery select2?
...ling my hair out on this one. I don't think it's possible without going to JavaScript solutions. Looking for another jQuery/Bootstrap Select2 dropdown now (2 days of fiddling every conceivable method - no joy!)
– MC9000
Nov 5 '16 at 5:17
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Properly removing an Integer from a List
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Java always calls the method that best suits your argument. Auto boxing and implicit upcasting is only performed if there's no method which can be called without casting / auto boxing.
The List interface specifies two remove...
What are the best practices for SQLite on Android?
...ultiple threads, one connection at a time. The SqliteDatabase object uses java locks to keep access serialized. So, if 100 threads have one db instance, calls to the actual on-disk database are serialized.
So, one helper, one db connection, which is serialized in java code. One thread, 1000 thre...
Is there a destructor for Java?
Is there a destructor for Java? I don't seem to be able to find any documentation on this. If there isn't, how can I achieve the same effect?
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Exception thrown inside catch block - will it be caught again?
... is listed before a child exception catch clause. My understanding is that Java disallows this, and it's caught at compile time.
– Chris Jester-Young
Nov 30 '16 at 17:43
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