Commit342d171

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iluwatar#6: Is prime number check

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+38

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+38

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Lines changed: 25 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -35,7 +35,7 @@`
`35`	`35`	`importjava.util.List;`
`36`	`36`	`importjava.util.zip.ZipEntry;`
`37`	`37`	`importjava.util.zip.ZipOutputStream;`
`38`		`-`
	`38`	`+`
`39`	`39`	`/*`
`40`	`40`	`* Java Snippets code`
`41`	`41`	`*`
`@@ -312,4 +312,28 @@ public static int httpGet(URL address) throws IOException {`
`312`	`312`	`HttpURLConnectioncon = (HttpURLConnection)address.openConnection();`
`313`	`313`	`returncon.getResponseCode();`
`314`	`314`	`}`
	`315`	`+`
	`316`	`+/**`
	`317`	`+ * Checks if given number is a prime number`
	`318`	`+ * Prime number is a number that is greater than 1 and divided by 1 or itself only`
	`319`	`+ * Credits: https://en.wikipedia.org/wiki/Prime_number`
	`320`	`+ * @param number number to check prime`
	`321`	`+ * @return true if prime`
	`322`	`+ */`
	`323`	`+publicstaticbooleanisPrime(intnumber) {`
	`324`	`+if (number <3) {`
	`325`	`+returntrue;`
	`326`	`+}`
	`327`	`+// check if n is a multiple of 2`
	`328`	`+if (number %2 ==0) {`
	`329`	`+returnfalse;`
	`330`	`+}`
	`331`	`+// if not, then just check the odds`
	`332`	`+for (inti =3;i *i <=number;i +=2) {`
	`333`	`+if (number %i ==0) {`
	`334`	`+returnfalse;`
	`335`	`+}`
	`336`	`+}`
	`337`	`+returntrue;`
	`338`	`+}`
`315`	`339`	`}`

Lines changed: 13 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -278,4 +278,17 @@ public void testHttpGet() throws IOException {`
`278`	`278`	`intresponseCode =Library.httpGet(newURL("http://www.google.com"));`
`279`	`279`	`assertEquals(200,responseCode);`
`280`	`280`	`}`
	`281`	`+`
	`282`	`+/**`
	`283`	`+ * Tests for {@link Library#isPrime(int)}`
	`284`	`+ */`
	`285`	`+@Test`
	`286`	`+publicvoidtestIsPrime() {`
	`287`	`+assertTrue(Library.isPrime(2));`
	`288`	`+assertTrue(Library.isPrime(3));`
	`289`	`+assertTrue(Library.isPrime(17));`
	`290`	`+assertTrue(Library.isPrime(97));`
	`291`	`+assertFalse(Library.isPrime(4));`
	`292`	`+assertFalse(Library.isPrime(100));`
	`293`	`+ }`
`281`	`294`	`}`

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