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Difference between maven scope compile and provided for JAR packaging
...endency at runtime. For example, when
building a web application for the Java Enterprise Edition, you would
set the dependency on the Servlet API and related Java EE APIs to
scope provided because the web container provides those classes. This
scope is only available on the compilation and t...
Rename package in Android Studio
... First create a new package with the desired name by right clicking on the Java folder → New → Package.
Then, select and drag all your classes to the new package. Android Studio will refactor the package name everywhere.
Finally, delete the old package.
Done.
Very important:
You have to man...
Strangest language feature
...
In JavaScript:
'5' + 3 gives '53'
Whereas
'5' - 3 gives 2
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edited Sep 21 '10 at 10:21
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How can I know when an EditText loses focus?
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Using Java 8 lambda expression:
editText.setOnFocusChangeListener((v, hasFocus) -> {
if(!hasFocus) {
String value = String.valueOf( editText.getText() );
}
});
...
Using Enum values as String literals
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JavaDoc: String java.lang.Enum.name() Returns the name of this enum constant, exactly as declared in its enum declaration. Most programmers should use the toString method in preference to this one, as the toString method ma...
Print second last column/field in awk
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As a mnemonic, this behavior is the same as C/Java etc. int x = ++i int x = i++, prefix means increment first; postfix means increment later (assignment first).
– Weekend
Dec 11 '19 at 7:20
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How to differentiate between time to live and time to idle in ehcache
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Not the answer you're looking for? Browse other questions tagged java ehcache or ask your own question.
scheduleAtFixedRate vs scheduleWithFixedDelay
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If you read the Java Doc it will be clearer
ScheduledFuture scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit)
Creates and executes a periodic action that becomes enabled first after the given initial de...
What are the pros and cons of performing calculations in sql vs. in your application
...engine is likely to have a more efficient decimal arithmetic routines than Java.
Generally though for row level calculations there is not much difference.
Where it does make a difference is:
Aggregate calculations like SUM(), AVG(),MIN(), MAX() here the database engine will be an order of magnit...
Python - When to use file vs open
...ing implemented by multiple classes in the io library (somewhat similar to Java with buffered readers, etc.)
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