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How can I convert an image into a Base64 string?
...on Android, here's a helper copied from the React Native codebase:
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import android.util.Base64;
import androi...
How to attach javadoc or sources to jars in libs folder?
...eFR and Christopher.
Step by step guide
In order to link the sources and javadoc to a .jar library that is automatically linked by Eclipse you have to do the following:
Place the library .jar file in the libs folder, and the associated source .jar and doc .jar files in separate subfolders such a...
Fade In Fade Out Android Animation in Java
... to let the native C++ code in Android do all this instead of calling in a Java loop.
– RoundSparrow hilltx
Sep 30 '14 at 14:04
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show 2 mor...
Getting java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory exception
i am executing simple Dependency Injection program of spring & getting this exception.
I have already included common-logging1.1.1.jar and spring.jar file. Could you please help to out?
...
Is there an easy way to attach source in Eclipse?
...ng the properties for a project.
Go to Properties (for the Project) -> Java Build Path -> Libraries
Select the Library you want to attach source/javadoc for and then expand it, you'll see a list like so:
Source Attachment: (none)
Javadoc location: (none)
Native library location: (none)
Acce...
Why would an Enum implement an Interface?
I just found out that Java allows enums to implement an interface. What would be a good use case for that?
16 Answers
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Maven does not find JUnit tests to run
... Note that the surefire documentation now claims that **/*Tests.java is a default include!
– Gareth
Oct 13 '17 at 9:54
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Sorting an ArrayList of objects using a custom sorting order
...
Here's a tutorial about ordering objects:
The Java Tutorials - Collections - Object Ordering
Although I will give some examples, I would recommend to read it anyway.
There are various way to sort an ArrayList. If you want to define a natural (default) ordering, then...
Why can a class not be defined as protected?
...
Since there's no such concept as 'subpackage' or 'package-inheritance' in Java, declaring class protected or package-private would be the same thing.
You can declare nested and inner classes as protected or private, though.
...
How to get image height and width using java?
...n't you also use probeContentType from the nio.Files package combined with javax.imageio.ImageIO.getImageReadersByMIMEType(mimeType) if you wanted to be certain of the type of file?
– EdgeCaseBerg
Nov 10 '15 at 19:14
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