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Delete all files in directory (but not directory) - one liner solution
...(File file: dir.listFiles()) is probably meant as.... for (File file : new java.io.File("C:\\DeleteMeFolder").listFiles()) ...
– Hartmut P.
Oct 28 '16 at 17:39
...
What does the `#` operator mean in Scala?
...tion -- and they might even be equal. Class is a runtime representation of Java classes, and it's limited even in Java. For example, List<String> and List<Integer> have the same runtime Class. If Class is not rich enough to represent Java types, it's almost useless when representing Scal...
Check string for palindrome
...quals(new StringBuilder(str).reverse().toString());
}
or for versions of Java earlier than 1.5,
public static boolean isPalindrome(String str) {
return str.equals(new StringBuffer().append(str).reverse().toString());
}
EDIT: @FernandoPelliccioni provided a very thorough analysis of the effi...
How to get hosting Activity from a view?
...
I took Gomino's answer and modified it to fit perfectly in myUtils.java so I can use it wherever and whenever I need. Hope someone finds it helpful :)
abstract class myUtils {
public static Activity getActivity(View view) {
Context context = view.getContext();
while (con...
Difference between staticmethod and classmethod
...n, are valid uses of staticmethods, but since modules, not classes like in Java, are the basic elements of code organization in Python, their use and usefulness is rare.
– Thomas Wouters
Sep 26 '08 at 13:40
...
Handling a Menu Item Click Event - Android
...s"
android:icon="@android:drawable/btn_radio"/>
</menu>
Java code looks like
src/MainActivity.java
@Override
public boolean onCreateOptionsMenu(Menu menu) {
present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
publ...
Interface vs Abstract Class (general OO)
...lly seems to be focusing on .NET use of these terms.
In .NET (similar for Java):
interfaces can have no state or implementation
a class that implements an interface must provide an implementation of all the methods of that interface
abstract classes may contain state (data members) and/or impleme...
Pick a random value from an enum?
...
Arrays in Java are mutable so if you have a array field and return it in a public method the caller can modify it and it modifies the private filed so you need to defensively copy the array. If you call that method lots of times it can...
How can you make a custom keyboard in Android?
I want to make a custom keyboard. I don't know how to do it using XML and Java. The following picture is a model of the keyboard I want to make. It only needs numbers.
...
How to get the result of OnPostExecute() to main activity because AsyncTask is a separate class?
...evelopers, one can use AutoResetEvents to achieve this and there is also a java implementation for autoresetevents but this is much cleaner. By the way, is ProcessFinish thread safe?
– Syler
Nov 29 '13 at 23:35
...