return new File(MyClass.class.getProtectionDomain().getCodeSource().getLocation() .toURI()).getPath(); Replace “MyClass” with the name of your class. Obviously, this will do odd things if your class was loaded from a non-file location.
Consider these filenames: C:\temp\file.txt – This is a path, an absolute path, and a canonical path. .\file.txt – This is a path. It’s neither an absolute path nor a canonical path. C:\temp\myapp\bin\..\\..\file.txt – This is a path and an absolute path. It’s not a canonical path. A canonical path is always an absolute path. Converting … Read more
A parallel stream has a much higher overhead compared to a sequential one. Coordinating the threads takes a significant amount of time. I would use sequential streams by default and only consider parallel ones if I have a massive amount of items to process (or the processing of each item takes time and is parallelizable) … Read more
Convert comma separated String to List List<String> items = Arrays.asList(str.split(“\\s*,\\s*”)); The above code splits the string on a delimiter defined as: zero or more whitespace, a literal comma, zero or more whitespace which will place the words into the list and collapse any whitespace between the words and commas. Please note that this returns simply … Read more
As described in the documentation, by default it takes the color set in styles.xml attribute colorAccent. The background color of this view defaults to the your theme’s colorAccent. If you wish to change this at runtime then you can do so via setBackgroundTintList(ColorStateList). If you wish to change the color in XML with attribute app:backgroundTint … Read more
UPDATE 2017/11/04 – Android Studio 3.0 now has native support for Java 8. gradle-retrolambda is now no longer needed. See https://developer.android.com/studio/write/java8-support.html The above link also includes migration instructions if you are using gradle-retrolambda. Original answer below: Android does not support Java 8. It only supports up to Java 7 (if you have kitkat) and still … Read more
You are correct. You can’t do new E(). But you can change it to private static class SomeContainer<E> { E createContents(Class<E> clazz) { return clazz.newInstance(); } } It’s a pain. But it works. Wrapping it in the factory pattern makes it a little more tolerable.
Here’s how to build a jar with IntelliJ 10 http://blogs.jetbrains.com/idea/2010/08/quickly-create-jar-artifact/ File -> Project Structure -> Project Settings -> Artifacts -> Click green plus sign -> Jar -> From modules with dependencies… Select a Main Class (the one with main() method) if you need to make the jar runnable. The above sets the “skeleton” to where … Read more
No, filter does not scan the whole stream. It’s an intermediate operation, which returns a lazy stream (actually all intermediate operations return a lazy stream). To convince you, you can simply do the following test: List<Integer> list = Arrays.asList(1, 10, 3, 7, 5); int a = list.stream() .peek(num -> System.out.println(“will filter ” + num)) .filter(x … Read more
Click the “Remove all Sessions” button in the toolbar of the “Coverage” view.