Add JMH dependency and shade the jar. Include examples to avoid contains() case insensitive behavior
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Cavero Barca
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@ -1,6 +1,7 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>core-java-string-operations-2</artifactId>
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<version>0.1.0-SNAPSHOT</version>
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@ -51,6 +52,18 @@
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<version>${org.hamcrest.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.openjdk.jmh</groupId>
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<artifactId>jmh-core</artifactId>
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<version>${jmh-core.version}</version>
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</dependency>
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<dependency>
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<groupId>org.openjdk.jmh</groupId>
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<artifactId>jmh-generator-annprocess</artifactId>
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<version>${jmh-generator.version}</version>
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</dependency>
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<dependency>
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
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@ -61,6 +74,29 @@
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<build>
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<finalName>core-java-string-operations-2</finalName>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<version>3.2.0</version>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>shade</goal>
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</goals>
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<configuration>
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<transformers>
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<transformer
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implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
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<mainClass>org.openjdk.jmh.Main</mainClass>
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</transformer>
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</transformers>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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<resources>
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<resource>
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<directory>src/main/resources</directory>
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@ -0,0 +1,84 @@
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package com.baeldung.containscaseinsensitive;
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import java.util.concurrent.TimeUnit;
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import java.util.regex.Pattern;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Fork;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.Setup;
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import org.openjdk.jmh.annotations.State;
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/**
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* Based on https://github.com/tedyoung/indexof-contains-benchmark
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*/
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@Fork(5)
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@State(Scope.Benchmark)
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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public class ContainsWorkarounds {
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private String src;
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private String dest;
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private Pattern pattern;
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public static void main(String[] args) throws Exception {
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org.openjdk.jmh.Main.main(args);
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}
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@Setup
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public void setup() {
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src = "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";
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dest = "eiusmod";
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pattern = Pattern.compile(Pattern.quote(dest), Pattern.CASE_INSENSITIVE);
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}
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// toLowerCase() and contains()
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@Benchmark
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public boolean lowerCaseContains() {
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return src.toLowerCase()
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.contains(dest.toLowerCase());
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}
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// matches() with Regular Expressions
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@Benchmark
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public boolean matchesRegularExpression() {
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return src.matches("(?i).*" + dest + ".*");
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}
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// String regionMatches()
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@Benchmark
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public boolean regionMatches() {
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final char firstLo = Character.toLowerCase(dest.charAt(0));
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final char firstUp = Character.toUpperCase(dest.charAt(0));
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for (int i = src.length() - dest.length(); i >= 0; i--) {
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final char ch = src.charAt(i);
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if (ch != firstLo && ch != firstUp)
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continue;
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if (src.regionMatches(true, i, dest, 0, dest.length()))
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return true;
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}
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return false;
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}
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// Pattern CASE_INSENSITIVE with regexp
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@Benchmark
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public boolean patternCaseInsensitiveRegexp() {
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return pattern.matcher(src)
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.find();
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}
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// Apache Commons StringUtils containsIgnoreCase
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@Benchmark
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public boolean apacheCommonsStringUtils() {
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return org.apache.commons.lang3.StringUtils.containsIgnoreCase(src, dest);
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}
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}
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