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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...
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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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...
Facebook Android Generate Key Hash
...SYSTEM.android) and paste into JDK bin Folder in my case (C:\Program Files\Java\jdk1.6.0_05\bin)
5) Open command prompt and give the path of JDK Bin folder in my case (C:\Program Files\Java\jdk1.6.0_05\bin).
6) Copy the following code and hit enter
keytool -exportcert -alias androiddebugkey -k...
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...
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...
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...
Which version of the git file will be finally used: LOCAL, BASE or REMOTE?
...iles will exist, assuming that the name of the file in the repository is X.java: X.java, X.java.orig, X.java.BACKUP.#, X.java.BASE.#, X.java.LOCAL.#, X.java.REMOTE.#, where # is some number. Calling the merge result the BASE version is confusing; MERGED would be better.
– Teemu...
What is the difference between statically typed and dynamically typed languages?
... that you as the programmer must specify what type each variable is (e.g.: Java, C, C++); other languages offer some form of type inference, the capability of the type system to deduce the type of a variable (e.g.: OCaml, Haskell, Scala, Kotlin)
The main advantage here is that all kinds of checking...