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Groovy: what's the purpose of “def” in “def x = 0”?
...rts.
e.g. In this snippet I have to import FileChannel
// Groovy imports java.io.* and java.util.* automatically
// but not java.nio.*
import java.nio.channels.*
class Foo {
public void bar() {
FileChannel channel = new FileInputStream('Test.groovy').getChannel()
println chan...
Eclipse: Can you format code on save?
In Eclipse, under Windows -> Preference -> Java -> Code Style , you can define code templates for comments and code, and you can setup a code formatter.
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How to capitalize the first character of each word in a string
Is there a function built into Java that capitalizes the first character of each word in a String, and does not affect the others?
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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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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...
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;
...
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...