JAVA-22238 | moved articles into correct locations. (#14297)
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@ -5,3 +5,5 @@ This module contains articles about string APIs.
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### Relevant Articles:
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### Relevant Articles:
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- [Retain Only Digits and Decimal Separator in String](https://www.baeldung.com/java-string-retain-digits-decimal)
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- [Retain Only Digits and Decimal Separator in String](https://www.baeldung.com/java-string-retain-digits-decimal)
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- [Difference Between null and Empty String in Java](https://www.baeldung.com/java-string-null-vs-empty)
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- [Difference Between null and Empty String in Java](https://www.baeldung.com/java-string-null-vs-empty)
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- [Guide to Java String Pool](https://www.baeldung.com/java-string-pool)
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- [Java Localization – Formatting Messages](https://www.baeldung.com/java-localization-messages-formatting)
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@ -24,6 +24,11 @@
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<artifactId>commons-lang3</artifactId>
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<artifactId>commons-lang3</artifactId>
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<version>${commons.lang3.version}</version>
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<version>${commons.lang3.version}</version>
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</dependency>
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</dependency>
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<dependency>
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<groupId>com.ibm.icu</groupId>
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<artifactId>icu4j</artifactId>
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<version>${icu4j.version}</version>
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</dependency>
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</dependencies>
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</dependencies>
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<build>
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<build>
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@ -39,6 +44,7 @@
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<properties>
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<properties>
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<commons.lang3.version>3.12.0</commons.lang3.version>
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<commons.lang3.version>3.12.0</commons.lang3.version>
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<guava.version>31.1-jre</guava.version>
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<guava.version>31.1-jre</guava.version>
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<icu4j.version>61.1</icu4j.version>
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</properties>
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</properties>
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</project>
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</project>
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@ -3,3 +3,6 @@
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- [Find the Longest Word in a Given String in Java](https://www.baeldung.com/java-longest-word-string)
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- [Find the Longest Word in a Given String in Java](https://www.baeldung.com/java-longest-word-string)
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- [Check if a String Is All Uppercase or Lowercase in Java](https://www.baeldung.com/java-check-string-uppercase-lowercase)
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- [Check if a String Is All Uppercase or Lowercase in Java](https://www.baeldung.com/java-check-string-uppercase-lowercase)
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- [Java – Generate Random String](https://www.baeldung.com/java-random-string)
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- [Fixing “constant string too long” Build Error](https://www.baeldung.com/java-constant-string-too-long-error)
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- [Compact Strings in Java 9](https://www.baeldung.com/java-9-compact-string)
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File diff suppressed because one or more lines are too long
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@ -1,103 +1,103 @@
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package com.baeldung.randomstrings;
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package com.baeldung.randomstrings;
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import org.apache.commons.lang3.RandomStringUtils;
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import org.apache.commons.lang3.RandomStringUtils;
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import org.junit.Test;
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import org.junit.Test;
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import org.slf4j.Logger;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.slf4j.LoggerFactory;
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import java.nio.charset.Charset;
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import java.nio.charset.Charset;
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import java.util.Random;
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import java.util.Random;
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public class RandomStringsUnitTest {
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public class RandomStringsUnitTest {
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private static final Logger LOG = LoggerFactory.getLogger(RandomStringsUnitTest.class);
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private static final Logger LOG = LoggerFactory.getLogger(RandomStringsUnitTest.class);
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@Test
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@Test
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public void givenUsingPlainJava_whenGeneratingRandomStringUnbounded_thenCorrect() {
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public void givenUsingPlainJava_whenGeneratingRandomStringUnbounded_thenCorrect() {
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byte[] array = new byte[7]; // length is bounded by 7
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byte[] array = new byte[7]; // length is bounded by 7
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new Random().nextBytes(array);
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new Random().nextBytes(array);
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String generatedString = new String(array, Charset.forName("UTF-8"));
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String generatedString = new String(array, Charset.forName("UTF-8"));
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LOG.debug(generatedString);
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LOG.debug(generatedString);
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}
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}
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@Test
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@Test
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public void givenUsingPlainJava_whenGeneratingRandomStringBounded_thenCorrect() {
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public void givenUsingPlainJava_whenGeneratingRandomStringBounded_thenCorrect() {
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int leftLimit = 97; // letter 'a'
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int leftLimit = 97; // letter 'a'
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int rightLimit = 122; // letter 'z'
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int rightLimit = 122; // letter 'z'
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int targetStringLength = 10;
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int targetStringLength = 10;
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Random random = new Random();
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Random random = new Random();
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StringBuilder buffer = new StringBuilder(targetStringLength);
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StringBuilder buffer = new StringBuilder(targetStringLength);
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for (int i = 0; i < targetStringLength; i++) {
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for (int i = 0; i < targetStringLength; i++) {
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int randomLimitedInt = leftLimit + (int) (random.nextFloat() * (rightLimit - leftLimit + 1));
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int randomLimitedInt = leftLimit + (int) (random.nextFloat() * (rightLimit - leftLimit + 1));
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buffer.append((char) randomLimitedInt);
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buffer.append((char) randomLimitedInt);
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}
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}
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String generatedString = buffer.toString();
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String generatedString = buffer.toString();
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LOG.debug(generatedString);
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LOG.debug(generatedString);
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}
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}
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@Test
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@Test
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public void givenUsingJava8_whenGeneratingRandomAlphabeticString_thenCorrect() {
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public void givenUsingJava8_whenGeneratingRandomAlphabeticString_thenCorrect() {
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int leftLimit = 97; // letter 'a'
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int leftLimit = 97; // letter 'a'
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int rightLimit = 122; // letter 'z'
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int rightLimit = 122; // letter 'z'
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int targetStringLength = 10;
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int targetStringLength = 10;
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Random random = new Random();
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Random random = new Random();
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String generatedString = random.ints(leftLimit, rightLimit + 1)
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String generatedString = random.ints(leftLimit, rightLimit + 1)
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.limit(targetStringLength)
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.limit(targetStringLength)
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.collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append)
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.collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append)
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.toString();
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.toString();
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LOG.debug(generatedString);
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LOG.debug(generatedString);
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}
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}
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@Test
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@Test
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public void givenUsingJava8_whenGeneratingRandomAlphanumericString_thenCorrect() {
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public void givenUsingJava8_whenGeneratingRandomAlphanumericString_thenCorrect() {
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int leftLimit = 48; // numeral '0'
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int leftLimit = 48; // numeral '0'
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int rightLimit = 122; // letter 'z'
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int rightLimit = 122; // letter 'z'
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int targetStringLength = 10;
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int targetStringLength = 10;
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Random random = new Random();
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Random random = new Random();
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String generatedString = random.ints(leftLimit, rightLimit + 1)
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String generatedString = random.ints(leftLimit, rightLimit + 1)
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.filter(i -> (i <= 57 || i >= 65) && (i <= 90 || i >= 97))
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.filter(i -> (i <= 57 || i >= 65) && (i <= 90 || i >= 97))
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.limit(targetStringLength)
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.limit(targetStringLength)
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.collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append)
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.collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append)
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.toString();
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.toString();
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LOG.debug(generatedString);
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LOG.debug(generatedString);
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}
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}
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@Test
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@Test
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public void givenUsingApache_whenGeneratingRandomString_thenCorrect() {
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public void givenUsingApache_whenGeneratingRandomString_thenCorrect() {
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String generatedString = RandomStringUtils.random(10);
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String generatedString = RandomStringUtils.random(10);
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LOG.debug(generatedString);
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LOG.debug(generatedString);
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}
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}
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@Test
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@Test
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public void givenUsingApache_whenGeneratingRandomAlphabeticString_thenCorrect() {
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public void givenUsingApache_whenGeneratingRandomAlphabeticString_thenCorrect() {
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String generatedString = RandomStringUtils.randomAlphabetic(10);
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String generatedString = RandomStringUtils.randomAlphabetic(10);
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LOG.debug(generatedString);
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LOG.debug(generatedString);
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}
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}
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@Test
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@Test
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public void givenUsingApache_whenGeneratingRandomAlphanumericString_thenCorrect() {
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public void givenUsingApache_whenGeneratingRandomAlphanumericString_thenCorrect() {
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String generatedString = RandomStringUtils.randomAlphanumeric(10);
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String generatedString = RandomStringUtils.randomAlphanumeric(10);
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LOG.debug(generatedString);
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LOG.debug(generatedString);
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}
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}
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@Test
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@Test
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public void givenUsingApache_whenGeneratingRandomStringBounded_thenCorrect() {
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public void givenUsingApache_whenGeneratingRandomStringBounded_thenCorrect() {
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int length = 10;
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int length = 10;
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boolean useLetters = true;
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boolean useLetters = true;
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boolean useNumbers = false;
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boolean useNumbers = false;
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String generatedString = RandomStringUtils.random(length, useLetters, useNumbers);
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String generatedString = RandomStringUtils.random(length, useLetters, useNumbers);
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LOG.debug(generatedString);
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LOG.debug(generatedString);
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}
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}
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}
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}
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@ -1,16 +1,16 @@
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## Java Strings
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## Java Strings
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This module contains articles about strings in Java.
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This is a generic module contains articles about strings in Java.
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Listed here there are only those articles that does not fit into other core-java-string-* modules as:
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- [core-java-string-operations](../core-java-string-operations)
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- [core-java-string-apis](../core-java-string-apis)
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- [core-java-string-conversion](../core-java-string-conversions)
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- [core-java-string-algorithms](../core-java-string-algorithms)
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### Relevant Articles:
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### Relevant Articles:
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- [Use char[] Array Over a String for Manipulating Passwords in Java?](https://www.baeldung.com/java-storing-passwords)
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- [Use char[] Array Over a String for Manipulating Passwords in Java?](https://www.baeldung.com/java-storing-passwords)
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- [Compact Strings in Java 9](https://www.baeldung.com/java-9-compact-string)
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- [String Not Empty Test Assertions in Java](https://www.baeldung.com/java-assert-string-not-empty)
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- [String Not Empty Test Assertions in Java](https://www.baeldung.com/java-assert-string-not-empty)
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- [String Performance Hints](https://www.baeldung.com/java-string-performance)
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- [String Performance Hints](https://www.baeldung.com/java-string-performance)
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- [Java Localization – Formatting Messages](https://www.baeldung.com/java-localization-messages-formatting)
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- [Java – Generate Random String](https://www.baeldung.com/java-random-string)
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- [Java String Interview Questions and Answers](https://www.baeldung.com/java-string-interview-questions)
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- [Java String Interview Questions and Answers](https://www.baeldung.com/java-string-interview-questions)
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- [Java Multi-line String](https://www.baeldung.com/java-multiline-string)
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- [Java Multi-line String](https://www.baeldung.com/java-multiline-string)
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- [Guide to Java String Pool](https://www.baeldung.com/java-string-pool)
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- [Fixing “constant string too long” Build Error](https://www.baeldung.com/java-constant-string-too-long-error)
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- [Reuse StringBuilder for Efficiency](https://www.baeldung.com/java-reuse-stringbuilder-for-efficiency)
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- [Reuse StringBuilder for Efficiency](https://www.baeldung.com/java-reuse-stringbuilder-for-efficiency)
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@ -29,11 +29,6 @@
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<artifactId>jmh-generator-annprocess</artifactId>
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<artifactId>jmh-generator-annprocess</artifactId>
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<version>${jmh-generator.version}</version>
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<version>${jmh-generator.version}</version>
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</dependency>
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</dependency>
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<dependency>
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<groupId>com.ibm.icu</groupId>
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<artifactId>icu4j</artifactId>
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<version>${icu4j.version}</version>
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</dependency>
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</dependencies>
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</dependencies>
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<build>
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<build>
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</build>
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</build>
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<properties>
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<properties>
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<icu4j.version>61.1</icu4j.version>
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<maven.compiler.release>15</maven.compiler.release>
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<maven.compiler.release>15</maven.compiler.release>
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</properties>
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</properties>
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