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Interface vs Base class
...
Well, Josh Bloch said himself in Effective Java 2d:
Prefer interfaces over abstract classes
Some main points:
Existing classes can be easily retrofitted to implement a new
interface. All you have to do is add
the required methods if they don’t yet
exi...
How to use support FileProvider for sharing content to other apps?
...lt;files-path name="app_directory" path="directory/"/>
</paths>
Java:
public static void sendFile(Context context) {
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
String dirpath = context.getFilesDir() + File.separator + "directory";
File f...
Tooltips for cells in HTML table (no Javascript)
Is it possible to have tooltips for table cells with no JavaScript. Can't use it.
6 Answers
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What is getattr() exactly and how do I use it?
...n an os2 machine'
def ce(self): print 'saving on a ce machine'
def java(self): print 'saving on a java machine'
def riscos(self): print 'saving on a riscos machine'
def _save(self): print 'saving on an unknown operating system'
def which_os(self): print os.name
Now let's use t...
showDialog deprecated. What's the alternative?
...e in xml like this: android:onClick="onClick" and then the method above in Java. If you need a custom Listener then you have to define one yourself. More details are in this question link
– MishaLee
Aug 7 '14 at 0:31
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How to check visibility of software keyboard in Android?
...t;
import android.view.View;
import android.view.ViewTreeObserver;
import java.util.LinkedList;
import java.util.List;
public class SoftKeyboardStateWatcher implements ViewTreeObserver.OnGlobalLayoutListener {
public interface SoftKeyboardStateListener {
void onSoftKeyboardOpened(int ...
Diff output from two programs without temporary files
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I tried this solution with a Java program and got this error: -bash: syntax error near unexpected token ('. I tried again without parenthesis and got -bash: java: No such file or directory. Does it not work if the command has parameters?
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What is the difference between persist() and merge() in JPA and Hibernate?
... very precise description of semantics of these operations, better than in javadoc:
The semantics of the persist
operation, applied to an entity X are
as follows:
If X is a new entity, it
becomes managed. The entity X will be
entered into the database at or before
transaction ...
In Intellij, how do I toggle between camel case and underscore spaced?
At my company we have two different style guides for java vs sql. In java I have a field named historyOfPresentIllness and when i write the sql, I want to name it history_of_present_illness . Is there a keyboard shortcut to switch from one to the other when I have the phrase highlighted? Or pe...
What optimizations can GHC be expected to perform reliably?
...hich libraries you choose to use).
For example, if you work with Haskell '98 arrays, don't expect any fusion of any kind. But I understand that the vector library has extensive fusion capabilities. It's all about the libraries; the compiler just provides the RULES pragma. (Which is extremely powerf...