¡@
java Programming Glossary: math.sqrtMemory overhead of Java HashMap compared to ArrayList http://stackoverflow.com/questions/1526596/memory-overhead-of-java-hashmap-compared-to-arraylist new int 128 static boolean isPrime int n for int i int Math.sqrt n i 2 i if n i 0 return false return true ArrayListMap for..
Can't transparent and undecorated JFrame in JDK7 when enabling nimbus http://stackoverflow.com/questions/16219111/cant-transparent-and-undecorated-jframe-in-jdk7-when-enabling-nimbus out effect w window2.getWidth h window2.getHeight r int Math.sqrt w w h h 2 radius x w 2 r top left coordinates of circle y h..
What is a sensible prime for hashcode calculation? http://stackoverflow.com/questions/1835976/what-is-a-sensible-prime-for-hashcode-calculation give small another meaning and want to be the minimum of Math.sqrt i i j j for the collision as large as possible the results are..
What would be the fastest method to test for primality in Java? http://stackoverflow.com/questions/2385909/what-would-be-the-fastest-method-to-test-for-primality-in-java if n 1 return false if n 2 return true for int i 2 i Math.sqrt n 1 i if n i 0 return false return true public static.. if n 2 return true if n 2 0 return false for int i 3 i Math.sqrt n 1 i i 2 if n i 0 return false return true public class.. 3 return true if n 2 0 n 3 0 return false long sqrtN long Math.sqrt n 1 for long i 6L i sqrtN i 6 if n i 1 0 n i 1 0 return false..
Fastest way to determine if an integer's square root is an integer http://stackoverflow.com/questions/295579/fastest-way-to-determine-if-an-integers-square-root-is-an-integer integer . I've done it the easy way by using the built in Math.sqrt function but I'm wondering if there is a way to do it faster.. isPerfectSquare long n if n 0 return false long tst long Math.sqrt n 0.5 return tst tst n Notes I'm using this function in many.. testing I found that adding 0.5 to the result of Math.sqrt is not necessary at least not on my machine. The John Carmack..
Android - SQlite Getting nearest locations (with latitude and longitude) http://stackoverflow.com/questions/3695224/android-sqlite-getting-nearest-locations-with-latitude-and-longitude dLon 2 Math.cos lat1 Math.cos lat2 double c 2 Math.atan2 Math.sqrt a Math.sqrt 1 a double d R c return d Enjoy I used and customized.. lat1 Math.cos lat2 double c 2 Math.atan2 Math.sqrt a Math.sqrt 1 a double d R c return d Enjoy I used and customized this reference..
http://stackoverflow.com/questions/5800649/detect-silence-when-recording sumMeanSquare raw.length double rootMeanSquare Math.sqrt averageMeanSquare return rootMeanSquare There is a byte buffer..
Calculate distance in meters when you know longitude and latitude in java [duplicate] http://stackoverflow.com/questions/837872/calculate-distance-in-meters-when-you-know-longitude-and-latitude-in-java Math.sin dLng 2 Math.sin dLng 2 double c 2 Math.atan2 Math.sqrt a Math.sqrt 1 a double dist earthRadius c int meterConversion.. dLng 2 Math.sin dLng 2 double c 2 Math.atan2 Math.sqrt a Math.sqrt 1 a double dist earthRadius c int meterConversion 1609 return..
|