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Java regex email
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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
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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...
Python naming conventions for modules
... Foo
from spam.eggs import Eggs, FriedEggs
It's a bit like emulating the Java way. One class per file. But with the added flexibility, that you can allways add another class to a single file if it makes sense.
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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
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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...
How to create your own library for Android development to be used in every program you write?
... Android Library, then click Next.
There's also an option to create a Java Library, which builds a traditional JAR file. While a JAR file is useful for many
projects—especially when you want to share code with other
platforms—it does not allow you to include Android resources or
manif...
&& (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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improve this answer
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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 ...
Using HeapDumpOnOutOfMemoryError parameter for heap dump for JBoss
...ion has to say:
By default the heap dump is created in
a file called java_pid.hprof in the
working directory of the VM, as in the
example above. You can specify an
alternative file name or directory
with the -XX:HeapDumpPath= option. For
example -XX:HeapDumpPath=/disk2/dumps
will c...
How to change package name of an Android Application
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I don't think the original questioner needed to change Java package names too. Marc's should be the accepted answer.
– mpellegr
Aug 14 '13 at 21:48
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