at.chrl.nutils.Rnd Maven / Gradle / Ivy
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package at.chrl.nutils;
import java.util.List;
/**
* @author Balancer
*
*/
public class Rnd {
private static final MTRandom rnd = new MTRandom();
/**
* @return rnd
*
*/
public static float get() // get random number from 0 to 1
{
return rnd.nextFloat();
}
/**
* Returns a array of length amount with random floats.
*
* @param amount - size of returned array
* @return array with random flaots
*/
public static float[] getFloats(int amount){
float[] array = new float[amount];
for (int i = 0; i < array.length; i++) {
array[i] = rnd.nextFloat();
}
return array;
}
/**
* Gets a random number from 0(inclusive) to n(exclusive)
*
* @param n
* The superior limit (exclusive)
* @return A number from 0 to n-1
*/
public static int get(int n) {
return (int) Math.floor(rnd.nextDouble() * n);
}
/**
* Get a random number from min(inclusiv) to max(inclusiv)
*
* @param min
* @param max
* @return value
*/
public static int get(int min, int max) // get random number from
// min to max (not max-1 !)
{
return min + (int) Math.floor(rnd.nextDouble() * (max - min + 1));
}
public static boolean chance(int chance) {
return chance >= 1 && (chance > 99 || nextInt(99) + 1 <= chance);
}
public static boolean chance(double chance) {
return nextDouble() <= chance / 100;
}
public static T get(T list[]) {
return list[get(list.length)];
}
public static int get(int list[]) {
return list[get(list.length)];
}
public static Object get(List list) {
return list.get(get(list.size()));
}
/**
* @param n
* @return n
*/
public static int nextInt(int n) {
return (int) Math.floor(rnd.nextDouble() * n);
}
/**
* @return int
*/
public static int nextInt() {
return rnd.nextInt();
}
/**
* @return short
*/
public static short nextShort() {
return (short) rnd.nextInt();
}
/**
* @return long
*/
public static long nextLong() {
return rnd.nextLong();
}
/**
* @return float
*/
public static float nextFloat() {
return rnd.nextFloat();
}
/**
* @return byte
*/
public static byte nextByte() {
byte[] b = new byte[1];
rnd.nextBytes(b);
return b[0];
}
/**
* @return double
*/
public static double nextDouble() {
return rnd.nextDouble();
}
/**
* @return gaussian
*/
public static double nextGaussian() {
return rnd.nextGaussian();
}
/**
* @return boolean
*/
public static boolean nextBoolean() {
return rnd.nextBoolean();
}
/**
* @return char
*/
public static char nextChar() {
return (char) nextInt(2 << 16);
}
/**
* @return string
*/
public static String nextString() {
return LoremIpsum.getRand();
}
}