java - Why is "2 * (i * i)" faster than "2 * i * i"? - Stack Overflow
The following Java program takes on average between 0.50 secs and 0.55 secs to run: public static void main(String[] args) { long startTime = System.nanoTime(); int n = 0; for (int i = 0; i < 1000000000; i++) { n += 2 * (i * i); } System.out.println( (double) (System.nanoTime() - startTime) / 1000000000 + " s"); System.out.println("n = " + n); } If I replace 2 * (i * i) with 2 * i * i, it takes be
Can (a== 1 && a ==2 && a==3) ever evaluate to true?
Moderator note: Please resist the urge to edit the code or remove this notice. The pattern of whitespace may be part of the question and therefore should not be tampered with unnecessarily. If you are in the "whitespace is insignificant" camp, you should be able to accept the code as is. Is it ever possible that (a== 1 && a ==2 && a==3) could evaluate to true in JavaScript? This is an interview qu
Java user.home is being set to %userprofile% and not being resolved
Our company recently upgraded from Windows XP to Windows 7 Enterprise. The JDK installation is no longer setting user.home to the full path of the user directory, but instead is setting user.home to %userprofile%. This is causing a lot of issues with applications such as Eclipse, Maven, etc. I now have to set -Duser.home in the JVM for each application. Has anyone else experienced this? Is there a
Binary Data in JSON String. Something better than Base64
The JSON format natively doesn't support binary data. The binary data has to be escaped so that it can be placed into a string element (i.e. zero or more Unicode chars in double quotes using backslash escapes) in JSON. An obvious method to escape binary data is to use Base64. However, Base64 has a high processing overhead. Also it expands 3 bytes into 4 characters which leads to an increased data
How do I create a new packaging type for Maven?
To do as you described, create a Maven project with packaging jar (as stated here, as there won't be mojo definitions). In the src/main/resources/META-INF/plexus sub-folder create a components.xml with the following contents (assuming you want the packaging type to be "my-custom-type", change it to "foobar" if you wish). <component-set> <components> <component> <role>org.apache.maven.lifecycle.map
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Creating a zip archive of the maven "target" directory