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URLEncoder not able to translate space character
...ts the HTML Specifications for how to encode URLs in HTML forms.
From the javadocs:
This class contains static methods for
converting a String to the
application/x-www-form-urlencoded MIME
format.
and from the HTML Specification:
application/x-www-form-urlencoded
Forms submit...
Java regex email
...
FWIW, here is the Java code we use to validate email addresses. The Regexp's are very similar:
public static final Pattern VALID_EMAIL_ADDRESS_REGEX =
Pattern.compile("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}$", Pattern.CASE_INSENSITIVE)...
Difference between object and class in Scala
...
tl;dr
class C defines a class, just as in Java or C++.
object O creates a singleton object O as instance of some anonymous class; it can be used to hold static members that are not associated with instances of some class.
object O extends T makes the object O an inst...
How can I remove a button or make it invisible in Android?
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Any way to enable/make it visible through javascript executor or anything?
– Ashok kumar Ganesan
Aug 11 at 7:00
add a comment
...
Sort ArrayList of custom Objects by property
... return o1.getStartDate().compareTo(o2.getStartDate());
}
});
Since java-8
You can now write the last example in a shorter form by using a lambda expression for the Comparator:
Collections.sort(Database.arrayList,
(o1, o2) -> o1.getStartDate().compareTo(o2.getStart...
&& (AND) and || (OR) in IF statements
... doSomethingWith(str.charAt(0));
}
If we didn't have 'short-circuits' in Java, we'd receive a lot of NullPointerExceptions in the above lines of code.
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ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]
... and also, its a library, so no distributed support, it's just an embedded Java library that you need to maintain.
In terms of Lucene usability, way back when (almost 6 years now), I created Compass. Its aim was to simplify using Lucene and make everyday Lucene simpler. What I came across time and ...
Android Studio - How to increase Allocated Heap Size
...+UseCompressedOops
Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool. Your JVM will be started with Xms amount of memory and will be able to use a maximum of Xmx amount of memory.
Save the studio.vmoptions file ...
Conveniently map between enum and int / String
...rameters that can only take a finite number of values, I try to always use Java's enum , as in
18 Answers
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Hibernate SessionFactory vs. JPA EntityManagerFactory
... use of the JPA is to be preferred over the Hibernate API, because it is a Java Enterprise standard. Using JPA (and restricting yourself to it, without using Hibernate-specific features) improves application portability, i.e. you have the option to switch to a different persistence framework with mi...