Check Prime numbers
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<module name="codebank" />
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@ -9,7 +9,7 @@
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- [Java 中的 NaN](https://www.ossez.com/t/java-nan/13748)
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- [Generating Prime Numbers in Java](https://www.baeldung.com/java-generate-prime-numbers)
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- [Using Math.pow in Java](https://www.baeldung.com/java-math-pow)
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- [Check If a Number Is Prime in Java](https://www.baeldung.com/java-prime-numbers)
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- [如何用 Java 判断一个给定的数是不是素数](https://www.ossez.com/t/java/13749)
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- [Binary Numbers in Java](https://www.baeldung.com/java-binary-numbers)
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- [Finding the Least Common Multiple in Java](https://www.baeldung.com/java-least-common-multiple)
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- [Binary Numbers in Java](https://www.baeldung.com/java-binary-numbers)
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@ -1,7 +1,9 @@
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package com.ossez.prime;
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import org.apache.commons.math3.primes.Primes;
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import org.junit.Test;
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import java.math.BigInteger;
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import java.util.Arrays;
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import java.util.List;
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@ -25,5 +27,6 @@ public class PrimeGeneratorUnitTest {
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public void whenSieveOfEratosthenes_returnsSuccessfully() {
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final List<Integer> primeNumbers = sieveOfEratosthenes(20);
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assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
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BigInteger bigInt = BigInteger.valueOf(100);
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}
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}
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@ -1,12 +1,16 @@
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package com.ossez.toolkits.codebank.tests.algorithm;
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import org.apache.commons.lang3.math.NumberUtils;
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import org.apache.commons.math3.primes.Primes;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.TestInstance;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.math.BigInteger;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.stream.IntStream;
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/**
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* <p>
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@ -43,6 +47,22 @@ public class PrimeNumbersTest {
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logger.debug("primeNumber Count -[{}]", primeNumberList);
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}
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/**
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* Prime Number Check Test
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*/
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@Test
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public void testIsPrime() {
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int number = 10;
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Boolean isPrime = number > 1
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&& IntStream.rangeClosed(2, (int) Math.sqrt(number))
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.noneMatch(n -> (number % n == 0));
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logger.debug(" {} Prime CORE Check is - [{}]", number, isPrime);
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logger.debug(" {} Prime BigInteger Check is - [{}]", number, BigInteger.valueOf(number).isProbablePrime(100));
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logger.debug(" {} Prime APACHE MATH3 Check is - [{}]", number, Primes.isPrime(number));
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}
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/**
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* @param number
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* @return
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