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What is the exact problem with multiple inheritance?
...her multiple inheritance should be included into the next version of C# or Java. C++ folks, who are fortunate enough to have this ability, say that this is like giving someone a rope to eventually hang themselves.
...
How to use JUnit and Hamcrest together?
...g.hamcrest.Matchers.is;
import static org.junit.Assert.assertThat;
import java.util.ArrayList;
import java.util.List;
import org.junit.Test;
public class EmptyTest {
@Test
public void testIsEmpty() {
List myList = new ArrayList();
assertThat(myList, is(empty()));
}
}
...
What is a higher kinded type in Scala?
...ract over a type once, but that type itself cannot abstract over anything. Java 5 generics are first-order.
The first-order interpretation of the above characterizations of abstractions are:
A type constructor is a type that you can apply to proper type arguments to "construct" a proper type.
A val...
Most efficient way to cast List to List
...st is a SubClass.
Generic collections do not behave the same as arrays in Java. Arrays are covariant; that is, it is allowed to do this:
SubClass[] subs = ...;
BaseClass[] bases = subs;
This is allowed, because the array "knows" the type of its elements. If someone attempts to store something th...
How to get current time and date in Android
...
You could use:
import java.util.Calendar
Date currentTime = Calendar.getInstance().getTime();
There are plenty of constants in Calendar for everything you need.
Edit:
Check Calendar class documentation
...
Use of 'const' for function parameters
...le variable" may sound as oxymoron, but is standard practice in functional languages, as well as some non-functional ones; see Rust for example: doc.rust-lang.org/book/variable-bindings.html
– Constantin
Jan 29 '17 at 16:49
...
Installation error: INSTALL_PARSE_FAILED_MANIFEST_MALFORMED?
...LL_PARSE_FAILED_MANIFEST_MALFORMED error code is returned by PackageParser.java
when it detects any of a large number of errors in the manifest.xml file.
To isolate the error, look in logcat (when you do the 'adb install foo.apk' command). In the problem I encountered, logcat contained:
W/Activit...
Isn't it silly that a tiny favicon requires yet another HTTP request? How can I put the favicon into
... Internet Explorer 9 at least.
index.html
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<!-- Suppress browser request for favicon.ico -->
<link rel="shortcut icon"type="image/x-icon" href="data:image/x-icon;,">
...
getResourceAsStream() vs FileInputStream
...
The java.io.File and consorts acts on the local disk file system. The root cause of your problem is that relative paths in java.io are dependent on the current working directory. I.e. the directory from which the JVM (in your cas...
R cannot be resolved - Android error
... this would generate the incorrect import statement which would hide the R.java class that is automatically generated when you build.
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