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What is a good use case for static import of methods?
...y one or two members, import them individually.
(https://docs.oracle.com/javase/8/docs/technotes/guides/language/static-import.html)
There are two parts I want to call out specifically:
Use static imports only when you were tempted to "abuse inheritance". In this case, would you have been tempt...
How to check if a char is equal to an empty space?
...ol codes, and some other Unicode characters in higher code planes; see the javadoc for Character.isWhitespace(char).
What you wrote was this:
if (Equals(ch, " ")) {
// ...
}
This is wrong on a number of levels. Firstly, the way that the Java compiler tries to interpret that is...
Convert seconds value to hours minutes seconds?
...
Something really helpful in Java 8
import java.time.LocalTime;
private String ConvertSecondToHHMMSSString(int nSecondTime) {
return LocalTime.MIN.plusSeconds(nSecondTime).toString();
}
...
Where should I put the log4j.properties file?
... WEB-INF\lib
Test if log4j was loaded: add -Dlog4j.debug @ the end of your java options of tomcat
Hope this will help.
rgds
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Lock, mutex, semaphore… what's the difference?
... not stored -- any thread in the set may be chosen to be the next owner.
Java (java.util.concurrent)
A lock (java.util.concurrent.ReentrantLock) is mostly the same as C/C++ pthread_mutex_t's, and Python's threading.RLock in that it also implements a reentrant lock. Sharing locks between processe...
enum.values() - is an order of returned enums deterministic
...
The Java language specification uses this explicit language:
@return an array containing the constants of this enum type, in the order they're declared [Source]
So, yes, they will be returned in declaration order. It's wort...
Main differences between SOAP and RESTful web services in Java [duplicate]
...sing. REST can be consumed by any client, even a web browser with Ajax and JavaScript. REST consumes less bandwidth, it does not require a SOAP header for every message.
REST is useful over any protocol which provide a URI. Ignore point 5 for REST as mentioned below in the picture.
...
How to check if an int is a null
... Of course, for local variable cannot be uninitialized, it's invalid code, Java won't permit it, as declared in its specification.
– Alex
Mar 7 at 21:43
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You need to use a Theme.AppCompat theme (or descendant) with this activity
...AppCompatActivity would also have this problem
In this case, change the Java inheritance from ActionBarActivity to Activity and leave the dialog theme in the manifest as it is, a non Theme.AppCompat value
The general rule is that if you want your code to support older versions of Android, it...
What is 'Context' on Android?
...ed if you make an http request. Context can be assumed as a bridge between Java and Android.
– Faruk Toptas
Jun 16 '16 at 12:14
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