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Merge pull request #10509 from dstr89/feature/BAEL-4618-final-performance

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Feature/bael 4618 final performance
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Eric Martin 2021-03-13 08:49:59 -06:00 committed by GitHub
commit 14aac09d18
6 changed files with 125 additions and 0 deletions
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5
core-java-modules/core-java-lang-4/README.md Normal file
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## Core Java Lang (Part 4)
This module contains articles about core features in the Java language
- TODO

47
core-java-modules/core-java-lang-4/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<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>core-java-lang-4</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>core-java-lang-4</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
<artifactId>core-java-modules</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>${jmh.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>${jmh.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>core-java-lang-4</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
</build>
<properties>
<jmh.version>1.28</jmh.version>
</properties>
</project>

34
core-java-modules/core-java-lang-4/src/main/java/com/baeldung/finalkeyword/BenchmarkRunner.java Normal file
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package com.baeldung.finalkeyword;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import java.util.concurrent.TimeUnit;
public class BenchmarkRunner {
public static void main(String[] args) throws Exception {
org.openjdk.jmh.Main.main(args);
}
@Benchmark
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@BenchmarkMode(Mode.AverageTime)
public static String concatNonFinalStrings() {
String x = "x";
String y = "y";
return x + y;
}
@Benchmark
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@BenchmarkMode(Mode.AverageTime)
public static String concatFinalStrings() {
final String x = "x";
final String y = "y";
return x + y;
}
}

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core-java-modules/core-java-lang-4/src/main/java/com/baeldung/finalkeyword/ClassVariableFinal.java Normal file
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package com.baeldung.finalkeyword;
import java.io.Console;
public class ClassVariableFinal {
static final boolean doX = false;
static final boolean doY = true;
public static void main(String[] args) {
Console console = System.console();
if (doX) {
console.writer().println("x");
} else if (doY) {
console.writer().println("y");
}
}
}

19
core-java-modules/core-java-lang-4/src/main/java/com/baeldung/finalkeyword/ClassVariableNonFinal.java Normal file
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package com.baeldung.finalkeyword;
import java.io.Console;
public class ClassVariableNonFinal {
static boolean doX = false;
static boolean doY = true;
public static void main(String[] args) {
Console console = System.console();
if (doX) {
console.writer().println("x");
} else if (doY) {
console.writer().println("y");
}
}
}

1
core-java-modules/pom.xml
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<module>core-java-lang</module>
<module>core-java-lang-2</module>
<module>core-java-lang-3</module>
<module>core-java-lang-4</module>
<module>core-java-lang-math</module>
<module>core-java-lang-math-2</module>
<module>core-java-lang-math-3</module>