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How to reference constants in EL?
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EL 3.0 or newer
If you're already on Java EE 7 / EL 3.0, then the @page import will also import class constants in EL scope.
<%@ page import="com.example.YourConstants" %>
This will under the covers be imported via ImportHandler#importClass() and be ava...
Include another JSP file
...de tag. But at runtime, it gives a file not found error. Exception details:java.io.FileNotFoundException: /includes/&lt;%= p %&gt;.jsp. Looks like the <%= p %> is used as it is in the file path!
– Akhilesh B Chandran
Feb 2 '12 at 10:25
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How to extract a substring using regex
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import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test {
public static void main(String[] args) {
Pattern pattern = Pattern.compile(".*'([^']*)'.*");
String mydata = "some string with ...
How to put Google Maps V2 on a Fragment using ViewPager
...ut_height="match_parent" />
</RelativeLayout>
Now, we code the Java class for showing the map in the file MapViewFragment.java:
public class MapViewFragment extends Fragment {
MapView mMapView;
private GoogleMap googleMap;
@Override
public View onCreateView(LayoutInfla...
Getting all names in an enum as a String[]
...ream(e.getEnumConstants()).map(Enum::name).toArray(String[]::new);
}
Pre Java 8 is still a one-liner, albeit less elegant:
public static String[] getNames(Class<? extends Enum<?>> e) {
return Arrays.toString(e.getEnumConstants()).replaceAll("^.|.$", "").split(", ");
}
That you w...
How to persist a property of type List in JPA?
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As mentioned in the comments below, the correct JPA 2 implementation is
javax.persistence.ElementCollection
@ElementCollection
Map<Key, Value> collection;
See: http://docs.oracle.com/javaee/6/api/javax/persistence/ElementCollection.html
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How to get the Full file path from URI
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Caused by: java.lang.IllegalArgumentException: URI is not absolute
– Anu Martin
Feb 15 '18 at 18:13
14
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What are five things you hate about your favorite language? [closed]
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Five things I hate about Java:
No first-class functions.
No type inference.
Lack of sane defaults in eg graphics.
NullPointerException not containing more information about what is null.
The proliferation of pointlessly "configurable" frameworks/se...
PHP Function Comments
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Looks like a copy of javadoc.
– Matt
Aug 21 '09 at 4:30
8
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node.js, socket.io with SSL
...example, you may generate the keystore by yourself with keytool command in java), you should add the extra option rejectUnauthorized
var socket = io.connect('https://localhost', {rejectUnauthorized: false});
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