From 25407f2a4315b8ef8d4b75eb8260520a98a1a0c3 Mon Sep 17 00:00:00 2001
From: jose <larroquester@gmail.com>
Date: Sat, 27 Apr 2019 00:36:55 -0300
Subject: [PATCH 1/2] BAEL-2832: new java-strings-2 project, with tests and
 benchmar

---
 java-strings-2/pom.xml                        | 150 ++++++++++++++++++
 .../SubstringSearchPerformanceComparison.java |  58 +++++++
 java-strings-2/src/main/resources/logback.xml |  13 ++
 .../string/search/SubstringSearch.java        |  70 ++++++++
 java-strings-2/src/test/resources/.gitignore  |  13 ++
 5 files changed, 304 insertions(+)
 create mode 100755 java-strings-2/pom.xml
 create mode 100644 java-strings-2/src/main/java/com/baeldung/string/search/performance/SubstringSearchPerformanceComparison.java
 create mode 100644 java-strings-2/src/main/resources/logback.xml
 create mode 100644 java-strings-2/src/test/java/com/baeldung/string/search/SubstringSearch.java
 create mode 100644 java-strings-2/src/test/resources/.gitignore

diff --git a/java-strings-2/pom.xml b/java-strings-2/pom.xml
new file mode 100755
index 0000000000..c314cd8cad
--- /dev/null
+++ b/java-strings-2/pom.xml
@@ -0,0 +1,150 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>java-strings-2</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>java-strings-2</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>${commons-io.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>log4j</groupId>
+            <artifactId>log4j</artifactId>
+            <version>${log4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>commons-codec</groupId>
+            <artifactId>commons-codec</artifactId>
+            <version>${commons-codec.version}</version>
+        </dependency>
+        <!-- test scoped -->
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${jmh-core.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>${jmh-core.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.ibm.icu</groupId>
+            <artifactId>icu4j</artifactId>
+            <version>${icu4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.vdurmont</groupId>
+            <artifactId>emoji-java</artifactId>
+            <version>${emoji-java.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${junit.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>${junit-jupiter-api.version}</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest-library</artifactId>
+            <version>${hamcrest-library.version}</version>
+            <scope>test</scope>
+        </dependency>
+
+        <!-- Added for password generation -->
+        <dependency>
+            <groupId>org.passay</groupId>
+            <artifactId>passay</artifactId>
+            <version>${passay.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-text</artifactId>
+            <version>${commons-text.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.ahocorasick</groupId>
+            <artifactId>ahocorasick</artifactId>
+            <version>${ahocorasick.version}</version>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <finalName>java-strings-2</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
+                    <compilerArgument>-parameters</compilerArgument>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <!-- util -->
+        <commons-lang3.version>3.8.1</commons-lang3.version>
+        <commons-codec.version>1.10</commons-codec.version>
+        <!-- testing -->
+        <assertj.version>3.6.1</assertj.version>
+        <jmh-core.version>1.19</jmh-core.version>
+        <icu4j.version>61.1</icu4j.version>
+        <guava.version>27.0.1-jre</guava.version>
+        <emoji-java.version>4.0.0</emoji-java.version>
+        <junit-jupiter-api.version>5.3.1</junit-jupiter-api.version>
+        <hamcrest-library.version>1.3</hamcrest-library.version>
+        <passay.version>1.3.1</passay.version>
+        <commons-text.version>1.4</commons-text.version>
+        <ahocorasick.version>0.4.0</ahocorasick.version>
+    </properties>
+
+</project>
\ No newline at end of file
diff --git a/java-strings-2/src/main/java/com/baeldung/string/search/performance/SubstringSearchPerformanceComparison.java b/java-strings-2/src/main/java/com/baeldung/string/search/performance/SubstringSearchPerformanceComparison.java
new file mode 100644
index 0000000000..bf33c47a7e
--- /dev/null
+++ b/java-strings-2/src/main/java/com/baeldung/string/search/performance/SubstringSearchPerformanceComparison.java
@@ -0,0 +1,58 @@
+package com.baeldung.string.search.performance;
+
+import java.util.concurrent.TimeUnit;
+import java.util.regex.Pattern;
+
+import org.apache.commons.lang3.StringUtils;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+
+/**
+ * Based on https://github.com/tedyoung/indexof-contains-benchmark
+ */
+@Fork(5)
+@State(Scope.Benchmark)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+public class SubstringSearchPerformanceComparison {
+
+    private String message;
+
+    private Pattern pattern;
+
+    public static void main(String[] args) throws Exception {
+        org.openjdk.jmh.Main.main(args);
+    }
+
+    @Setup
+    public void setup() {
+        message = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum";
+        pattern = Pattern.compile("(?<!\\S)" + "eiusmod" + "(?!\\S)");
+    }
+
+    @Benchmark
+    public int indexOf() {
+        return message.indexOf("eiusmod");
+    }
+
+    @Benchmark
+    public boolean contains() {
+        return message.contains("eiusmod");
+    }
+
+    @Benchmark
+    public boolean containsStringUtilsIgnoreCase() {
+        return StringUtils.containsIgnoreCase(message, "eiusmod");
+    }
+
+    @Benchmark
+    public boolean searchWithPattern() {
+        return pattern.matcher(message).find();
+    }
+}
\ No newline at end of file
diff --git a/java-strings-2/src/main/resources/logback.xml b/java-strings-2/src/main/resources/logback.xml
new file mode 100644
index 0000000000..7d900d8ea8
--- /dev/null
+++ b/java-strings-2/src/main/resources/logback.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/java-strings-2/src/test/java/com/baeldung/string/search/SubstringSearch.java b/java-strings-2/src/test/java/com/baeldung/string/search/SubstringSearch.java
new file mode 100644
index 0000000000..4a5adb45ef
--- /dev/null
+++ b/java-strings-2/src/test/java/com/baeldung/string/search/SubstringSearch.java
@@ -0,0 +1,70 @@
+package com.baeldung.string.search;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.apache.commons.lang3.StringUtils;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * BAEL-2832: Different ways to check if a Substring could be found in a String.
+ */
+public class SubstringSearch {
+
+    @Test
+    public void searchSubstringWithIndexOf() {
+        Assert.assertEquals(9, "Bohemian Rhapsodyan".indexOf("Rhap"));
+
+        // indexOf will return -1, because it's case sensitive
+        Assert.assertEquals(-1, "Bohemian Rhapsodyan".indexOf("rhap"));
+
+        // indexOf will return 9, because it's all lowercase
+        Assert.assertEquals(9, "Bohemian Rhapsodyan".toLowerCase()
+            .indexOf("rhap"));
+
+        // it will return 6, because it's the first occurrence. Sorry Queen for being blasphemic
+        Assert.assertEquals(6, "Bohemian Rhapsodyan".indexOf("an"));
+    }
+
+    @Test
+    public void searchSubstringWithContains() {
+        Assert.assertTrue("Hey Ho, let's go".contains("Hey"));
+
+        // contains will return false, because it's case sensitive
+        Assert.assertFalse("Hey Ho, let's go".contains("hey"));
+
+        // contains will return true, because it's all lowercase
+        Assert.assertTrue("Hey Ho, let's go".toLowerCase().contains("hey"));
+
+        // contains will return false, because 'jey' can't be found
+        Assert.assertFalse("Hey Ho, let's go".contains("jey"));
+    }
+
+    @Test
+    public void searchSubstringWithStringUtils() {
+        Assert.assertTrue(StringUtils.containsIgnoreCase("Runaway train", "train"));
+
+        // it will also be true, because ignores case ;)
+        Assert.assertTrue(StringUtils.containsIgnoreCase("Runaway train", "Train"));
+    }
+
+    @Test
+    public void searchUsingPattern() {
+
+        // We create the Pattern first
+        Pattern pattern = Pattern.compile("(?<!\\S)" + "road" + "(?!\\S)");
+
+        // We need to create the Matcher after
+        Matcher matcher = pattern.matcher("Hit the road Jack");
+
+        // find will return true when the first match is found
+        Assert.assertTrue(matcher.find());
+
+        // We will create a different matcher with a different text
+        matcher = pattern.matcher("and don't you come back no more");
+
+        // find will return false, because 'road' can't be find as a substring
+        Assert.assertFalse(matcher.find());
+    }
+}
\ No newline at end of file
diff --git a/java-strings-2/src/test/resources/.gitignore b/java-strings-2/src/test/resources/.gitignore
new file mode 100644
index 0000000000..83c05e60c8
--- /dev/null
+++ b/java-strings-2/src/test/resources/.gitignore
@@ -0,0 +1,13 @@
+*.class
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear
\ No newline at end of file

From caa9f36a158d71302e6751a0eef804cfb1253970 Mon Sep 17 00:00:00 2001
From: jose <larroquester@gmail.com>
Date: Sat, 27 Apr 2019 00:40:12 -0300
Subject: [PATCH 2/2] BAEL-2832: added java-strings-2 module to main pom.xml

---
 pom.xml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pom.xml b/pom.xml
index 5e1098d216..403e3c7ed5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -462,6 +462,7 @@
                 <module>java-streams</module>
                 <module>java-streams-2</module>
                 <module>java-strings</module>
+                <module>java-strings-2</module>
                 <module>java-vavr-stream</module>
                 <module>java-websocket</module>
                 <module>javafx</module>
@@ -1133,6 +1134,7 @@
                 <module>java-streams</module>
                 <module>java-streams-2</module>
                 <module>java-strings</module>
+                <module>java-strings-2</module>
                 <module>java-vavr-stream</module>
                 <module>java-websocket</module>
                 <module>javafx</module>