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Package objects
...ed to emulate a package wide import
// especially useful when wrapping a Java API
type DateTime = org.joda.time.DateTime
type JList[T] = java.util.List[T]
// Define implicits needed to effectively use your API:
implicit def a2b(a: A): B = // ...
}
Now the definitions inside that packa...
Java client certificates over HTTPS/SSL
I am using Java 6 and am trying to create an HttpsURLConnection against a remote server, using a client certificate.
The server is using an selfsigned root certificate, and requires that a password-protected client certificate is presented. I've added the server root certificate and the client c...
Java ArrayList how to add elements at the beginning
...(list);
list.add(elementForTop);
Collections.reverse(list);
If you use Java 8 streams, this answer might interest you.
Analysis
Time Complexity: O(n)
Space Complexity: O(1)
Looking at the JDK implementation this has a O(n) time complexity so only suitable for very small lists.
...
SQL parser library for Java [closed]
Is there an open-source Java library for parsing SQL statements?
7 Answers
7
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Is there a stopwatch in Java?
Is there a stopwatch in Java? On google I only find code of stopwatches which don't work - they always return 0 milliseconds.
...
When do Java generics require
...
First - I have to direct you to http://www.angelikalanger.com/GenericsFAQ/JavaGenericsFAQ.html -- she does an amazing job.
The basic idea is that you use
<T extends SomeClass>
when the actual parameter can be SomeClass or any subtype of it.
In your example,
Map<String, Class<? ext...
Fastest way to iterate over all the chars in a String
In Java, what would the fastest way to iterate over all the chars in a String, this:
8 Answers
...
How to make System.out.println() shorter
...pets" plugin for your favorite text editor/IDE
Static Import
import static java.lang.System.out;
out.println("Hello World");
Explore JVM languages
Scala
println("Hello, World!")
Groovy
println "Hello, World!"
Jython
print "Hello, World!"
JRuby
puts "Hello, World!"
Clojure
(println "Hello, W...
Using comparison operators in Scala's pattern matching system
...s only that the non-equal outcomes will be greater than or less than zero. Java's Comparable#compareTo(T) is specified similarly to Scala's. It happens to be conventional to use 1 and -1 for the positive and negative values, respectively, as Scala's current implementation does, but one can't make su...
Good tutorials on XMPP? [closed]
...rtet on XMPP Development:
A good book: XMPP The Definivie Guide
A mature Java API. I've chosen the Smack Library from Ignite Realtime and used the groovy language with a buch of small scripts to learn the basics.
Later i developed a plugin for the OpenFire XMPP Server. There are some tutorials ...