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Set up adb on Mac OS X
...DK:
sudo port install android
Run the SDK manager:
sh /opt/local/share/java/android-sdk-macosx/tools/android
Uncheck everything but Android SDK Platform-tools (optional)
Install the packages, accepting licenses. Close the SDK Manager.
Add platform-tools to your path; in MacPorts, they're in ...
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...
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.
...
Why are data transfer objects (DTOs) an anti-pattern?
...slightly different format than a native business object.
I know this is a Java-oriented question, but in .NET languages anonymous types, serialization, and LINQ allow DTOs to be constructed on-the-fly, which reduces the setup and overhead of using them.
...
Generate fixed length Strings filled with whitespaces
...
Since Java 1.5 we can use the method java.lang.String.format(String, Object...) and use printf like format.
The format string "%1$15s" do the job. Where 1$ indicates the argument index, s indicates that the argument is a String an...
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()));
}
}
...
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
...
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...
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...