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Design Patterns web based applications [closed]
...fic Model and View based on the request. The Model is to be represented by Javabean classes. This is often further dividable in Business Model which contains the actions (behaviour) and Data Model which contains the data (information). The View is to be represented by JSP files which have direct acc...
What is the difference between an ordered and a sorted collection?
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Java uses "ordered collection" to mean a collection such as List, where (unlike HashSet), the collection remembers what order the elements are supposed to be in. So elements can be added to the collection at a particular "pla...
Is there a method that calculates a factorial in Java?
I didn't find it, yet. Did I miss something?
I know a factorial method is a common example program for beginners. But wouldn't it be useful to have a standard implementation for this one to reuse?
I could use such a method with standard types (Eg. int, long...) and with BigInteger / BigDecimal, too...
HTTPS connections over proxy servers
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Here is my complete Java code that supports both HTTP and HTTPS requests using SOCKS proxy.
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
...
The import javax.servlet can't be resolved [duplicate]
I'm trying to use eclipse for Java EE to develop web applications.
8 Answers
8
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When should one use final for method parameters and local variables?
... by default. You may not notice the benefits unless you use a truly modern Java IDE, though (ie, IDEA).
– Rogério
Jan 12 '10 at 1:44
10
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Collections.emptyList() vs. new instance
...hich you cannot add elements. (Same applies to the List.of() introduced in Java 9.)
In the rare cases where you do want to modify the returned list, Collections.emptyList() and List.of() are thus not a good choices.
I'd say that returning an immutable list is perfectly fine (and even the preferred...
What is a serialVersionUID and why should I use it?
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The docs for java.io.Serializable are probably about as good an explanation as you'll get:
The serialization runtime associates with each serializable class a version number, called a serialVersionUID, which is used during deserializa...
Android Endless List
....com/CyberEagle/OpenProjects/blob/master/android-projects/widgets/src/main/java/br/com/cybereagle/androidwidgets/helper/ListViewWithLoadingIndicatorHelper.java
- Helper to make it possible to use the features without extending from SimpleListViewWithLoadingIndicator.
https://github.com/CyberEagle/O...
Why does Ruby have both private and protected methods?
...ed like this.
It is important to note that this is different from the way Java or C++ works. private in Ruby is similar to protected in Java/C++ in that subclasses have access to the method. In Ruby, there is no way to restrict access to a method from its subclasses like you can with private in Ja...