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package compbio.util;
import java.text.SimpleDateFormat;
import java.util.HashMap;
import java.util.Random;
/**
* Utility methods
*
* @author pvtroshin
*
*/
public class Util {
public static final boolean isEmpty(String string) {
return string == null || string.trim().length() == 0;
}
public static final SimpleDateFormat datef = new SimpleDateFormat(
"HH:mm-dd/MM/yyyy");
public static <K, V> HashMap<K, V> getNewHashMap() {
return new HashMap<K, V>();
}
final static Random rand = new Random();
/*
* Returns random integers with value in range from min to max
* @param min
* @param max
* @return
*/
public static int getRandomNumber(int start, int end) {
if (start >= end) {
throw new IllegalArgumentException("Start cannot exceed End.");
}
// get the range, casting to long to avoid overflow problems
long range = (long) end - (long) start + 1;
// compute a fraction of the range, 0 <= frac < range
long fraction = (long) (range * rand.nextDouble());
return (int) (fraction + start);
}
public static double getRandomNumber(double min, double max) {
return (max - min) * rand.nextDouble() + min;
}
}
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