Submit all code for code-java-string branch

Reviewed-on: https://src.ossez.com/cwiki-us-docs/java-tutorials/pulls/39

.idea/compiler.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile default="true" name="Default" enabled="true" />
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="codebank" />
+        <module name="core-java-collections-list" />
+        <module name="core-java-streams" />
+        <module name="assertion-libraries" />
+        <module name="core-java-io" />
+        <module name="core-java-annotations" />
+        <module name="core-java-8-2" />
+        <module name="core-java-numbers" />
+        <module name="discourse" />
+        <module name="core-java-11-2" />
+        <module name="core-java-strings" />
+        <module name="core-java-11" />
+        <module name="core-java-collections-list-2" />
+        <module name="core-java-collections" />
+        <module name="core-java-datetime-conversion" />
+        <module name="core-java-collections-list-3" />
+        <module name="core-java-8" />
+        <module name="junit-5-basics" />
+        <module name="core-java-collections-3" />
+        <module name="core-java-collections-2" />
+      </profile>
+    </annotationProcessing>
+  </component>
+  <component name="JavacSettings">
+    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
+      <module name="core-java-streams" options="-parameters" />
+    </option>
+  </component>
+</project>

.idea/encodings.xml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-11-2/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-11-2/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-11/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-11/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8-2/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8-2/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-annotations/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-annotations/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-2/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-2/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-3/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-3/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-list-2/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-list-2/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-list-3/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-list-3/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-list/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-list/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-datetime-conversion/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-datetime-conversion/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-io/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-io/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-numbers/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-numbers/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-streams/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-streams/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-strings/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-strings/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/assertion-libraries/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/assertion-libraries/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/junit-5-basics/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/junit-5-basics/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/junit-5-basics/src/test/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/toolkits/codebank/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/toolkits/codebank/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/toolkits/discourse/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/toolkits/discourse/src/main/resources" charset="UTF-8" />
+  </component>
+</project>

.idea/jarRepositories.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://repo.maven.apache.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+  </component>
+</project>

.idea/thriftCompiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ThriftCompiler">
+    <compilers />
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

Jenkinsfile

@@ -0,0 +1,27 @@
+pipeline {
+    agent any
+
+    tools {
+        maven 'maven 3.8.4'
+        jdk 'OpenJDK-11'
+    }
+
+    stages {
+        stage('Build') {
+            steps {
+                echo 'Building..'
+                sh 'mvn clean package'
+            }
+        }
+        stage('Test') {
+            steps {
+                echo 'Testing..'
+            }
+        }
+        stage('Deploy') {
+            steps {
+                echo 'Deploying....'
+            }
+        }
+    }
+}

core-java-modules/README.md

@@ -1,8 +1,8 @@
-## Core Java Modules
+## Java 核心模块（Core Java）
 
-This module contains modules about core Java
+本模块中包含有关 Java 核心（Core Java）有关的内容。
 
-## Relevant articles:
+## 相关文章
 
 - [Understanding the NumberFormatException in Java](https://www.baeldung.com/java-number-format-exception)
 

core-java-modules/core-java-annotations/README.md

@@ -1,6 +1,7 @@
-=========
+## Annotation（注解）
+Java 注解（Annotation）又称 Java 标注，是 JDK5.0 引入的一种注释机制。
 
-## Core Java Cookbooks and Examples
+Java 语言中的类、方法、变量、参数和包等都可以被标注。和 Javadoc 不同，Java 标注可以通过反射获取标注内容。在编译器生成类文件时，标注可以被嵌入到字节码中。Java 虚拟机可以保留标注内容，在运行时可以获取到标注内容 。 当然它也支持自定义 Java 标注。
 
 ### 相关的文章： 
 - [Java @Override Annotation](https://www.baeldung.com/java-override)

core-java-modules/core-java-collections-3/pom.xml

@@ -11,7 +11,6 @@
         <groupId>com.ossez.core-java-modules</groupId>
         <artifactId>core-java-modules</artifactId>
         <version>0.0.2-SNAPSHOT</version>
-        <relativePath>../pom.xml</relativePath>
     </parent>
 
     <dependencies>
@@ -34,6 +33,7 @@
 
     <properties>
         <jol-core.version>0.10</jol-core.version>
+        <commons-exec.version>1.3</commons-exec.version>
     </properties>
 
 </project>

core-java-modules/core-java-collections-3/src/main/java/com/ossez/collections/arraylistvsvector/ArrayListBenchmark.java

@@ -1,4 +1,4 @@
-package com.ossez.collections.collections.arraylistvsvector;
+package com.ossez.collections.arraylistvsvector;
 
 import org.openjdk.jmh.annotations.*;
 import org.openjdk.jmh.runner.Runner;

core-java-modules/core-java-collections-3/src/main/java/com/ossez/collections/arraylistvsvector/Employee.java

@@ -1,4 +1,4 @@
-package com.ossez.collections.collections.arraylistvsvector;
+package com.ossez.collections.arraylistvsvector;
 
 public class Employee {
 

core-java-modules/core-java-collections-3/src/main/java/com/ossez/collections/arraylistvsvector/VectorExample.java

@@ -1,4 +1,4 @@
-package com.ossez.collections.collections.arraylistvsvector;
+package com.ossez.collections.arraylistvsvector;
 
 import java.util.Enumeration;
 import java.util.Iterator;

core-java-modules/core-java-collections-3/src/main/java/com/ossez/collections/containsperformance/CollectionsBenchmark.java

@@ -1,4 +1,4 @@
-package com.ossez.collections.collections.containsperformance;
+package com.ossez.collections.containsperformance;
 
 import org.openjdk.jmh.annotations.*;
 import org.openjdk.jmh.runner.Runner;

core-java-modules/core-java-collections-3/src/main/java/com/ossez/collections/containsperformance/Employee.java

@@ -1,4 +1,4 @@
-package com.ossez.collections.collections.containsperformance;
+package com.ossez.collections.containsperformance;
 
 public class Employee {
 

core-java-modules/core-java-collections-3/src/main/java/com/ossez/collections/iterators/Iterators.java

@@ -1,4 +1,4 @@
-package com.ossez.collections.collections.iterators;
+package com.ossez.collections.iterators;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

core-java-modules/core-java-collections-3/src/main/java/com/ossez/collections/removeallperformance/HashSetBenchmark.java

@@ -1,4 +1,4 @@
-package com.ossez.collections.collections.removeallperformance;
+package com.ossez.collections.removeallperformance;
 
 import java.util.ArrayList;
 import java.util.HashSet;
@@ -6,7 +6,7 @@ import java.util.List;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
-import com.ossez.collections.collections.containsperformance.Employee;
+import com.ossez.collections.containsperformance.Employee;
 import org.apache.commons.lang3.RandomStringUtils;
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.BenchmarkMode;

core-java-modules/core-java-collections-3/src/main/java/com/ossez/collections/sortingcomparison/ArraySortBenchmark.java

@@ -1,4 +1,4 @@
-package com.ossez.collections.collections.sortingcomparison;
+package com.ossez.collections.sortingcomparison;
 
 import java.util.Arrays;
 import java.util.concurrent.TimeUnit;

core-java-modules/core-java-collections-3/src/test/java/com/ossez/collections/iterators/IteratorsUnitTest.java

@@ -1,8 +1,8 @@
 package com.ossez.collections.iterators;
 
-import static com.ossez.collections.collections.iterators.Iterators.failFast1;
+import static com.ossez.collections.iterators.Iterators.failFast1;
-import static com.ossez.collections.collections.iterators.Iterators.failFast2;
+import static com.ossez.collections.iterators.Iterators.failFast2;
-import static com.ossez.collections.collections.iterators.Iterators.failSafe1;
+import static com.ossez.collections.iterators.Iterators.failSafe1;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 

core-java-modules/core-java-numbers/README.md

@@ -1,6 +1,6 @@
 ## Java 数字（Number）
 
-这个模块中包含有关 Java 数字（Number）有关的文章。
+本模块中包含有关 Java 数字（Number）有关的文章。
 
 ### 相关文章
 - [理解 Java 中的 NumberFormatException 异常](https://www.ossez.com/t/java-numberformatexception/13986)

core-java-modules/core-java-numbers/pom.xml

@@ -8,10 +8,9 @@
     <packaging>jar</packaging>
 
     <parent>
-        <groupId>com.ossez</groupId>
+        <groupId>com.ossez.core-java-modules</groupId>
-        <artifactId>parent-modules</artifactId>
+        <artifactId>core-java-modules</artifactId>
         <version>0.0.2-SNAPSHOT</version>
-        <relativePath>../pom.xml</relativePath>
     </parent>
 
     <dependencies>
@@ -49,7 +48,7 @@
 
     <properties>
         <icu4j.version>61.1</icu4j.version>
-        <maven.compiler.release>15</maven.compiler.release>
+        <maven.compiler.release>11</maven.compiler.release>
     </properties>
 
 </project>

core-java-modules/core-java-numbers/src/main/java/com/ossez/java9/compactstring/CompactStringDemo.java

@@ -0,0 +1,21 @@
+package com.ossez.java9.compactstring;
+
+import java.util.List;
+import java.util.stream.IntStream;
+
+import static java.util.stream.Collectors.toList;
+
+public class CompactStringDemo {
+
+    public static void main(String[] args) {
+        long startTime = System.currentTimeMillis();
+        List strings = IntStream.rangeClosed(1, 10_000_000).mapToObj(Integer::toString).collect(toList());
+        long totalTime = System.currentTimeMillis() - startTime;
+        System.out.println("Generated " + strings.size() + " strings in " + totalTime + " ms.");
+
+        startTime = System.currentTimeMillis();
+        String appended = (String) strings.stream().limit(100_000).reduce("", (left, right) -> left.toString() + right.toString());
+        totalTime = System.currentTimeMillis() - startTime;
+        System.out.println("Created string of length " + appended.length() + " in " + totalTime + " ms.");
+    }
+}

core-java-modules/core-java-numbers/src/main/java/com/ossez/localization/App.java

@@ -0,0 +1,21 @@
+package com.ossez.localization;
+
+import java.text.ParseException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+
+public class App {
+
+    /**
+     * Runs all available formatter
+     * @throws ParseException 
+     */
+    public static void main(String[] args) {
+        List<Locale> locales = Arrays.asList(new Locale[] { Locale.UK, Locale.ITALY, Locale.FRANCE, Locale.forLanguageTag("pl-PL") });
+        Localization.run(locales);
+        JavaSEFormat.run(locales);
+        ICUFormat.run(locales);
+    }
+
+}

core-java-modules/core-java-numbers/src/main/java/com/ossez/localization/ICUFormat.java

@@ -0,0 +1,29 @@
+package com.ossez.localization;
+
+import com.ibm.icu.text.MessageFormat;
+
+import java.util.List;
+import java.util.Locale;
+import java.util.ResourceBundle;
+
+public class ICUFormat {
+
+    public static String getLabel(Locale locale, Object[] data) {
+        ResourceBundle bundle = ResourceBundle.getBundle("formats", locale);
+        String format = bundle.getString("label-icu");
+        MessageFormat formatter = new MessageFormat(format, locale);
+        return formatter.format(data);
+    }
+
+    public static void run(List<Locale> locales) {
+        System.out.println("ICU formatter");
+        locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 0 })));
+        locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 1 })));
+        locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 2 })));
+        locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 3 })));
+        locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 0 })));
+        locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 1 })));
+        locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 2 })));
+        locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 3 })));
+    }
+}

core-java-modules/core-java-numbers/src/main/java/com/ossez/localization/JavaSEFormat.java

@@ -0,0 +1,24 @@
+package com.ossez.localization;
+
+import java.text.MessageFormat;
+import java.util.Date;
+import java.util.List;
+import java.util.Locale;
+import java.util.ResourceBundle;
+
+public class JavaSEFormat {
+
+    public static String getLabel(Locale locale, Object[] data) {
+        ResourceBundle bundle = ResourceBundle.getBundle("formats", locale);
+        final String pattern = bundle.getString("label");
+        final MessageFormat formatter = new MessageFormat(pattern, locale);
+        return formatter.format(data);
+    }
+
+    public static void run(List<Locale> locales) {
+        System.out.println("Java formatter");
+        final Date date = new Date(System.currentTimeMillis());
+        locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { date, "Alice", 0 })));
+        locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { date, "Alice", 2 })));
+    }
+}

core-java-modules/core-java-numbers/src/main/java/com/ossez/localization/Localization.java

@@ -0,0 +1,18 @@
+package com.ossez.localization;
+
+import java.util.List;
+import java.util.Locale;
+import java.util.ResourceBundle;
+
+public class Localization {
+
+    public static String getLabel(Locale locale) {
+        final ResourceBundle bundle = ResourceBundle.getBundle("messages", locale);
+        return bundle.getString("label");
+    }
+
+    public static void run(List<Locale> locales) {
+        locales.forEach(locale -> System.out.println(getLabel(locale)));
+    }
+
+}

core-java-modules/core-java-numbers/src/main/java/com/ossez/stringperformance/StringPerformance.java

@@ -0,0 +1,198 @@
+package com.ossez.stringperformance;
+
+import com.google.common.base.Splitter;
+import org.apache.commons.lang3.StringUtils;
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.StringTokenizer;
+import java.util.concurrent.TimeUnit;
+import java.util.regex.Pattern;
+
+@BenchmarkMode(Mode.SingleShotTime)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
+@Measurement(batchSize = 100000, iterations = 10)
+@Warmup(batchSize = 100000, iterations = 10)
+@State(Scope.Thread)
+public class StringPerformance {
+
+    protected String baeldung = "baeldung";
+    protected String longString = "Hello baeldung, I am a bit longer than other Strings";
+    protected String formatString = "hello %s, nice to meet you";
+    protected String formatDigit = "%d";
+    protected String emptyString = " ";
+    protected String result = "";
+
+    protected int sampleNumber = 100;
+
+    protected Pattern spacePattern = Pattern.compile(emptyString);
+    protected Pattern longPattern = Pattern.compile(longString);
+    protected List<String> stringSplit = new ArrayList<>();
+    protected List<String> stringTokenizer = new ArrayList<>();
+
+    @Benchmark
+    public String benchmarkStringDynamicConcat() {
+        result += baeldung;
+        return result;
+    }
+
+    @Benchmark
+    public StringBuilder  benchmarkStringBuilder() {
+        StringBuilder stringBuilder = new StringBuilder(result);
+        stringBuilder.append(baeldung);
+        return stringBuilder;
+    }
+
+    @Benchmark
+    public StringBuffer benchmarkStringBuffer() {
+        StringBuffer stringBuffer = new StringBuffer(result);
+        stringBuffer.append(baeldung);
+        return stringBuffer;
+    }
+
+    @Benchmark
+    public String benchmarkStringConstructor() {
+        String result = new String("baeldung");
+        return result;
+    }
+
+    @Benchmark
+    public String benchmarkStringLiteral() {
+        String result = "baeldung";
+        return result;
+    }
+
+    @Benchmark
+    public String benchmarkStringFormat_s() {
+        return String.format(formatString, baeldung);
+    }
+
+    @Benchmark
+    public String benchmarkStringConcat() {
+        result = result.concat(baeldung);
+        return result;
+    }
+
+    @Benchmark
+    public String benchmarkStringIntern() {
+        return baeldung.intern();
+    }
+
+    @Benchmark
+    public String benchmarkStringReplace() {
+        return longString.replace("average", " average !!!");
+    }
+
+    @Benchmark
+    public String benchmarkStringUtilsReplace() {
+        return StringUtils.replace(longString, "average", " average !!!");
+    }
+
+    @Benchmark
+    public List<String> benchmarkGuavaSplitter() {
+        return Splitter.on(" ").trimResults()
+                .omitEmptyStrings()
+                .splitToList(longString);
+    }
+
+    @Benchmark
+    public String [] benchmarkStringSplit() {
+        return longString.split(emptyString);
+    }
+
+    @Benchmark
+    public String [] benchmarkStringSplitPattern() {
+        return spacePattern.split(longString, 0);
+    }
+
+    @Benchmark
+    public List benchmarkStringTokenizer() {
+        StringTokenizer st = new StringTokenizer(longString);
+        while (st.hasMoreTokens()) {
+            stringTokenizer.add(st.nextToken());
+        }
+        return stringTokenizer;
+    }
+
+    @Benchmark
+    public List benchmarkStringIndexOf() {
+        int pos = 0, end;
+        while ((end = longString.indexOf(' ', pos)) >= 0) {
+            stringSplit.add(longString.substring(pos, end));
+            pos = end + 1;
+        }
+        //Add last token of string
+        stringSplit.add(longString.substring(pos));
+        return stringSplit;
+    }
+
+    @Benchmark
+    public String benchmarkIntegerToString() {
+        return Integer.toString(sampleNumber);
+    }
+
+    @Benchmark
+    public String benchmarkStringValueOf() {
+        return String.valueOf(sampleNumber);
+    }
+
+
+    @Benchmark
+    public String benchmarkStringConvertPlus() {
+        return sampleNumber + "";
+    }
+
+        @Benchmark
+    public String benchmarkStringFormat_d() {
+        return String.format(formatDigit, sampleNumber);
+    }
+
+    @Benchmark
+    public boolean benchmarkStringEquals() {
+        return longString.equals(baeldung);
+    }
+
+
+    @Benchmark
+    public boolean benchmarkStringEqualsIgnoreCase() {
+        return longString.equalsIgnoreCase(baeldung);
+    }
+
+    @Benchmark
+    public boolean benchmarkStringMatches() {
+        return longString.matches(baeldung);
+    }
+
+    @Benchmark
+    public boolean benchmarkPrecompiledMatches() {
+        return longPattern.matcher(baeldung).matches();
+    }
+
+    @Benchmark
+    public int benchmarkStringCompareTo() {
+        return longString.compareTo(baeldung);
+    }
+
+    @Benchmark
+    public boolean benchmarkStringIsEmpty() {
+        return longString.isEmpty();
+    }
+
+    @Benchmark
+    public boolean benchmarkStringLengthZero() {
+        return longString.length() == 0;
+    }
+
+    public static void main(String[] args) throws Exception {
+        Options options = new OptionsBuilder()
+                .include(StringPerformance.class.getSimpleName()).threads(1)
+                .forks(1).shouldFailOnError(true)
+                .shouldDoGC(true)
+                .jvmArgs("-server").build();
+        new Runner(options).run();
+    }
+}

core-java-modules/core-java-numbers/src/main/resources/formats_en.properties

@@ -0,0 +1,2 @@
+label=On {0, date, short} {1} has sent you {2, choice, 0#no messages|1#a message|2#two messages|2<{2,number,integer} messages}.
+label-icu={0} has sent you {2, plural, =0 {no messages} =1 {a message} other {{2, number, integer} messages}}.

core-java-modules/core-java-numbers/src/main/resources/formats_fr.properties

@@ -0,0 +1,2 @@
+label={0, date, short}, {1}{2, choice, 0# ne|0<} vous a envoy\u00e9 {2, choice, 0#aucun message|1#un message|2#deux messages|2<{2,number,integer} messages}.
+label-icu={0} {2, plural, =0 {ne } other {}}vous a envoy\u00e9 {2, plural, =0 {aucun message} =1 {un message} other {{2, number, integer} messages}}.

core-java-modules/core-java-numbers/src/main/resources/formats_it.properties

@@ -0,0 +1,2 @@
+label={0, date, short} {1} ti ha inviato {2, choice, 0#nessun messagio|1#un messaggio|2#due messaggi|2<{2, number, integer} messaggi}.
+label-icu={0} {2, plural, =0 {non } other {}}ti ha inviato {2, plural, =0 {nessun messaggio} =1 {un messaggio} other {{2, number, integer} messaggi}}.