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What could cause java.lang.reflect.InvocationTargetException?
...ws an exception.
So if the method, that has been invoked with reflection API, throws an exception (runtime exception for example), the reflection API will wrap the exception into an InvocationTargetException.
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How do CDI and EJB compare? interact?
...ht than the CDI event bus and EJB3 only defines a listener, not a producer API.
JSF Managed Beans have existed in Java EE ever since JSF was included. They too feature dependency injection and scoping. JSF Managed Beans introduced the concept of declarative scoping. Originally the scopes were rathe...
How to write a Unit Test?
...node2_1));
These are the imports that I added:
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
This is the test that I wrote:
You can check your methods like below:
Assertions.assertEquals(<Expected>,<actual>);
Assertions.assertTrue(<actual>);
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Which @NotNull Java annotation should I use?
...3305ecd1b415e2ab1b9ef8a9120b4
javax.validation.constraints from validation-api-1.0.0.GA-sources.jar
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How to access java-classes in the default-package?
...nically you can, as shown in Sharique Abdullah's answer through reflection API, but classes from the unnamed namespace are not in scope in an import declaration)
Prior to J2SE 1.4 you could import classes from the default package using a syntax like this:
import Unfinished;
That's no longer allowed...
Java string to date conversion
...s and available format patterns; the tutorial is available here). This new API is inspired by JodaTime.
String string = "January 2, 2010";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("MMMM d, yyyy", Locale.ENGLISH);
LocalDate date = LocalDate.parse(string, formatter);
System.out.printl...
Converting Integer to String with comma for thousands
...his implements the locale-specific grouping. docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#dnum
– adam.r
Jan 28 '14 at 21:08
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When to use references vs. pointers
...de when it is more-or-less appropriate to use references or pointers in an API?
17 Answers
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How to handle Handler messages when activity/fragment is paused
...s.
Another advantage is that this approach is compatible with any Android API version, since BroadcastReceivers and Intents have been introduced on API level 1.
Your are not required to setup any special permissions on your app's manifest file except if you plan to use sendStickyBroadcast(where yo...
How to get the return value from a thread in python?
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In Python 3.2+, stdlib concurrent.futures module provides a higher level API to threading, including passing return values or exceptions from a worker thread back to the main thread:
import concurrent.futures
def foo(bar):
print('hello {}'.format(bar))
return 'foo'
with concurrent.futur...