48 lines
1.2 KiB
Java
48 lines
1.2 KiB
Java
package com.github.javafaker.service;
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import org.apache.commons.lang.math.RandomUtils;
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import java.util.Random;
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public class RandomService {
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private final Random random;
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/**
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* @param random If null is passed in, a default Random is assigned
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*/
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public RandomService(Random random) {
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this.random = random != null ? random : RandomUtils.JVM_RANDOM;
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}
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public int nextInt(int n) {
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return RandomUtils.nextInt(random, n);
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}
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public long nextLong() {
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return RandomUtils.nextLong(random);
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}
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// lifted from http://stackoverflow.com/questions/2546078/java-random-long-number-in-0-x-n-range
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public long nextLong(long n) {
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if (n <= 0) {
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throw new IllegalArgumentException("bound must be positive");
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}
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long bits, val;
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do {
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long randomLong = RandomUtils.nextLong(random);
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bits = (randomLong << 1) >>> 1;
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val = bits % n;
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} while (bits - val + (n - 1) < 0L);
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return val;
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}
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public double nextDouble() {
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return RandomUtils.nextDouble(random);
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}
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public Boolean nextBoolean() {
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return RandomUtils.nextBoolean(random);
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}
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}
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