java concurrency (#2502)
* fix spring config * fix spring config * fix spring config * minor fix * fix spring-boot module * fix pom * upgrade jackson * minor fix * java concurrency * cleanup
This commit is contained in:
Doha2012
Grzegorz Piwowarek
parent
09d10ac85f
commit
25263f1d6f
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@ -0,0 +1,26 @@
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*.class
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0.*
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#folders#
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/target
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/neoDb*
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||||
/data
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||||
/src/main/webapp/WEB-INF/classes
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||||
*/META-INF/*
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||||
.resourceCache
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|
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# Packaged files #
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*.jar
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*.war
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*.ear
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||||
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# Files generated by integration tests
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*.txt
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backup-pom.xml
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/bin/
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/temp
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#IntelliJ specific
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.idea/
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*.iml
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@ -0,0 +1,32 @@
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=========
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## Core Java Concurrency Examples
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### Relevant Articles:
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- [Guide To CompletableFuture](http://www.baeldung.com/java-completablefuture)
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- [A Guide to the Java ExecutorService](http://www.baeldung.com/java-executor-service-tutorial)
|
||||
- [Introduction to Thread Pools in Java](http://www.baeldung.com/thread-pool-java-and-guava)
|
||||
- [Guide to java.util.concurrent.Future](http://www.baeldung.com/java-future)
|
||||
- [Guide to java.util.concurrent.BlockingQueue](http://www.baeldung.com/java-blocking-queue)
|
||||
- [Guide to CountDownLatch in Java](http://www.baeldung.com/java-countdown-latch)
|
||||
- [A Guide to ConcurrentMap](http://www.baeldung.com/java-concurrent-map)
|
||||
- [Guide to PriorityBlockingQueue in Java](http://www.baeldung.com/java-priority-blocking-queue)
|
||||
- [Avoiding the ConcurrentModificationException in Java](http://www.baeldung.com/java-concurrentmodificationexception)
|
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- [Custom Thread Pools In Java 8 Parallel Streams](http://www.baeldung.com/java-8-parallel-streams-custom-threadpool)
|
||||
- [Guide to java.util.concurrent.Locks](http://www.baeldung.com/java-concurrent-locks)
|
||||
- [An Introduction to ThreadLocal in Java](http://www.baeldung.com/java-threadlocal)
|
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- [Guide to DelayQueue](http://www.baeldung.com/java-delay-queue)
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- [A Guide to Java SynchronousQueue](http://www.baeldung.com/java-synchronous-queue)
|
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- [Guide to the Java TransferQueue](http://www.baeldung.com/java-transfer-queue)
|
||||
- [Guide to the ConcurrentSkipListMap](http://www.baeldung.com/java-concurrent-skip-list-map)
|
||||
- [Difference Between Wait and Sleep in Java](http://www.baeldung.com/java-wait-and-sleep)
|
||||
- [LongAdder and LongAccumulator in Java](http://www.baeldung.com/java-longadder-and-longaccumulator)
|
||||
- [The Dining Philosophers Problem in Java](http://www.baeldung.com/java-dining-philoshophers)
|
||||
- [Guide to CopyOnWriteArrayList](http://www.baeldung.com/java-copy-on-write-arraylist)
|
||||
- [Guide to the Java Phaser](http://www.baeldung.com/java-phaser)
|
||||
- [Guide to Synchronized Keyword in Java](http://www.baeldung.com/java-synchronized)
|
||||
- [An Introduction to Atomic Variables in Java](http://www.baeldung.com/java-atomic-variables)
|
||||
- [CyclicBarrier in Java](http://www.baeldung.com/java-cyclic-barrier)
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||||
- [Guide to Volatile Keyword in Java](http://www.baeldung.com/java-volatile)
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||||
- [Overview of the java.util.concurrent](http://www.baeldung.com/java-util-concurrent)
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- [Semaphores in Java](http://www.baeldung.com/java-semaphore)
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@ -0,0 +1,237 @@
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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">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<groupId>com.baeldung</groupId>
|
||||
<artifactId>core-java-concurrency</artifactId>
|
||||
<version>0.1.0-SNAPSHOT</version>
|
||||
<packaging>jar</packaging>
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|
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<name>core-java-concurrency</name>
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|
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<parent>
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||||
<groupId>com.baeldung</groupId>
|
||||
<artifactId>parent-modules</artifactId>
|
||||
<version>1.0.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
|
||||
<dependencies>
|
||||
|
||||
<!-- utils -->
|
||||
<dependency>
|
||||
<groupId>com.google.guava</groupId>
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||||
<artifactId>guava</artifactId>
|
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<version>${guava.version}</version>
|
||||
</dependency>
|
||||
|
||||
<dependency>
|
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-collections4</artifactId>
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<version>${commons-collections4.version}</version>
|
||||
</dependency>
|
||||
|
||||
<dependency>
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||||
<groupId>commons-io</groupId>
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<artifactId>commons-io</artifactId>
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<version>${commons-io.version}</version>
|
||||
</dependency>
|
||||
|
||||
<dependency>
|
||||
<groupId>org.apache.commons</groupId>
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<artifactId>commons-lang3</artifactId>
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<version>${commons-lang3.version}</version>
|
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</dependency>
|
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|
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-math3</artifactId>
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<version>${commons-math3.version}</version>
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</dependency>
|
||||
|
||||
|
||||
<!-- test scoped -->
|
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|
||||
<dependency>
|
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
|
||||
<version>${assertj.version}</version>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
|
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<dependency>
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<groupId>com.jayway.awaitility</groupId>
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<artifactId>awaitility</artifactId>
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<version>${avaitility.version}</version>
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||||
<scope>test</scope>
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</dependency>
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|
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</dependencies>
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|
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<build>
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<finalName>core-java-concurrency</finalName>
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<resources>
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<resource>
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<directory>src/main/resources</directory>
|
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<filtering>true</filtering>
|
||||
</resource>
|
||||
</resources>
|
||||
|
||||
<plugins>
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
||||
<artifactId>maven-dependency-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<id>copy-dependencies</id>
|
||||
<phase>prepare-package</phase>
|
||||
<goals>
|
||||
<goal>copy-dependencies</goal>
|
||||
</goals>
|
||||
<configuration>
|
||||
<outputDirectory>${project.build.directory}/libs</outputDirectory>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
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</plugin>
|
||||
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
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<artifactId>maven-jar-plugin</artifactId>
|
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<configuration>
|
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<archive>
|
||||
<manifest>
|
||||
<addClasspath>true</addClasspath>
|
||||
<classpathPrefix>libs/</classpathPrefix>
|
||||
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
|
||||
</manifest>
|
||||
</archive>
|
||||
</configuration>
|
||||
</plugin>
|
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<plugin>
|
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<groupId>org.apache.maven.plugins</groupId>
|
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<artifactId>maven-assembly-plugin</artifactId>
|
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<executions>
|
||||
<execution>
|
||||
<phase>package</phase>
|
||||
<goals>
|
||||
<goal>single</goal>
|
||||
</goals>
|
||||
<configuration>
|
||||
<archiveBaseDirectory>${project.basedir}</archiveBaseDirectory>
|
||||
<archive>
|
||||
<manifest>
|
||||
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
|
||||
</manifest>
|
||||
</archive>
|
||||
<descriptorRefs>
|
||||
<descriptorRef>jar-with-dependencies</descriptorRef>
|
||||
</descriptorRefs>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
||||
<artifactId>maven-shade-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<goals>
|
||||
<goal>shade</goal>
|
||||
</goals>
|
||||
<configuration>
|
||||
<shadedArtifactAttached>true</shadedArtifactAttached>
|
||||
<transformers>
|
||||
<transformer
|
||||
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
|
||||
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
|
||||
</transformer>
|
||||
</transformers>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
<plugin>
|
||||
<groupId>com.jolira</groupId>
|
||||
<artifactId>onejar-maven-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<configuration>
|
||||
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
|
||||
<attachToBuild>true</attachToBuild>
|
||||
<filename>${project.build.finalName}-onejar.${project.packaging}</filename>
|
||||
</configuration>
|
||||
<goals>
|
||||
<goal>one-jar</goal>
|
||||
</goals>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
<plugin>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-maven-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<goals>
|
||||
<goal>repackage</goal>
|
||||
</goals>
|
||||
<configuration>
|
||||
<classifier>spring-boot</classifier>
|
||||
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
</plugins>
|
||||
|
||||
</build>
|
||||
|
||||
<profiles>
|
||||
<profile>
|
||||
<id>integration</id>
|
||||
<build>
|
||||
<plugins>
|
||||
<plugin>
|
||||
<groupId>org.apache.maven.plugins</groupId>
|
||||
<artifactId>maven-surefire-plugin</artifactId>
|
||||
<executions>
|
||||
<execution>
|
||||
<phase>integration-test</phase>
|
||||
<goals>
|
||||
<goal>test</goal>
|
||||
</goals>
|
||||
<configuration>
|
||||
<excludes>
|
||||
<exclude>**/*ManualTest.java</exclude>
|
||||
</excludes>
|
||||
<includes>
|
||||
<include>**/*IntegrationTest.java</include>
|
||||
</includes>
|
||||
</configuration>
|
||||
</execution>
|
||||
</executions>
|
||||
<configuration>
|
||||
<systemPropertyVariables>
|
||||
<test.mime>json</test.mime>
|
||||
</systemPropertyVariables>
|
||||
</configuration>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
</profile>
|
||||
</profiles>
|
||||
|
||||
<properties>
|
||||
|
||||
<!-- util -->
|
||||
<guava.version>21.0</guava.version>
|
||||
<commons-lang3.version>3.5</commons-lang3.version>
|
||||
<commons-math3.version>3.6.1</commons-math3.version>
|
||||
<commons-io.version>2.5</commons-io.version>
|
||||
<commons-collections4.version>4.1</commons-collections4.version>
|
||||
<collections-generic.version>4.01</collections-generic.version>
|
||||
|
||||
<!-- testing -->
|
||||
<assertj.version>3.6.1</assertj.version>
|
||||
<avaitility.version>1.7.0</avaitility.version>
|
||||
|
||||
</properties>
|
||||
</project>
|
||||
|
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@ -0,0 +1,9 @@
|
|||
# Set root logger level to DEBUG and its only appender to A1.
|
||||
log4j.rootLogger=DEBUG, A1
|
||||
|
||||
# A1 is set to be a ConsoleAppender.
|
||||
log4j.appender.A1=org.apache.log4j.ConsoleAppender
|
||||
|
||||
# A1 uses PatternLayout.
|
||||
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
|
||||
log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
|
||||
|
|
@ -0,0 +1,19 @@
|
|||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<configuration>
|
||||
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
|
||||
<encoder>
|
||||
<pattern>web - %date [%thread] %-5level %logger{36} - %message%n
|
||||
</pattern>
|
||||
</encoder>
|
||||
</appender>
|
||||
|
||||
<logger name="org.springframework" level="WARN" />
|
||||
<logger name="org.springframework.transaction" level="WARN" />
|
||||
|
||||
<!-- in order to debug some marshalling issues, this needs to be TRACE -->
|
||||
<logger name="org.springframework.web.servlet.mvc" level="WARN" />
|
||||
|
||||
<root level="INFO">
|
||||
<appender-ref ref="STDOUT" />
|
||||
</root>
|
||||
</configuration>
|
||||
|
|
@ -1,27 +1,31 @@
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package com.baeldung.java.concurrentmap;
|
||||
|
||||
import org.junit.Test;
|
||||
import static org.junit.Assert.assertEquals;
|
||||
import static org.junit.Assert.assertTrue;
|
||||
|
||||
import java.util.Collections;
|
||||
import java.util.HashMap;
|
||||
import java.util.Hashtable;
|
||||
import java.util.Map;
|
||||
import java.util.concurrent.*;
|
||||
import java.util.concurrent.ConcurrentHashMap;
|
||||
import java.util.concurrent.ExecutorService;
|
||||
import java.util.concurrent.Executors;
|
||||
import java.util.concurrent.ThreadLocalRandom;
|
||||
import java.util.concurrent.TimeUnit;
|
||||
|
||||
import static org.junit.Assert.assertEquals;
|
||||
import static org.junit.Assert.assertTrue;
|
||||
import org.junit.Test;
|
||||
|
||||
public class ConcurrentMapPerformanceManualTest {
|
||||
|
||||
@Test
|
||||
public void givenMaps_whenGetPut500KTimes_thenConcurrentMapFaster() throws Exception {
|
||||
Map<String, Object> hashtable = new Hashtable<>();
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||||
Map<String, Object> synchronizedHashMap = Collections.synchronizedMap(new HashMap<>());
|
||||
Map<String, Object> concurrentHashMap = new ConcurrentHashMap<>();
|
||||
final Map<String, Object> hashtable = new Hashtable<>();
|
||||
final Map<String, Object> synchronizedHashMap = Collections.synchronizedMap(new HashMap<>());
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||||
final Map<String, Object> concurrentHashMap = new ConcurrentHashMap<>();
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||||
|
||||
long hashtableAvgRuntime = timeElapseForGetPut(hashtable);
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||||
long syncHashMapAvgRuntime = timeElapseForGetPut(synchronizedHashMap);
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||||
long concurrentHashMapAvgRuntime = timeElapseForGetPut(concurrentHashMap);
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||||
final long hashtableAvgRuntime = timeElapseForGetPut(hashtable);
|
||||
final long syncHashMapAvgRuntime = timeElapseForGetPut(synchronizedHashMap);
|
||||
final long concurrentHashMapAvgRuntime = timeElapseForGetPut(concurrentHashMap);
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||||
|
||||
System.out.println(String.format("Hashtable: %s, syncHashMap: %s, ConcurrentHashMap: %s", hashtableAvgRuntime, syncHashMapAvgRuntime, concurrentHashMapAvgRuntime));
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||||
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||||
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|
@ -31,13 +35,13 @@ public class ConcurrentMapPerformanceManualTest {
|
|||
}
|
||||
|
||||
private long timeElapseForGetPut(Map<String, Object> map) throws InterruptedException {
|
||||
ExecutorService executorService = Executors.newFixedThreadPool(4);
|
||||
long startTime = System.nanoTime();
|
||||
final ExecutorService executorService = Executors.newFixedThreadPool(4);
|
||||
final long startTime = System.nanoTime();
|
||||
for (int i = 0; i < 4; i++) {
|
||||
executorService.execute(() -> {
|
||||
for (int j = 0; j < 500_000; j++) {
|
||||
int value = ThreadLocalRandom.current().nextInt(10000);
|
||||
String key = String.valueOf(value);
|
||||
final int value = ThreadLocalRandom.current().nextInt(10000);
|
||||
final String key = String.valueOf(value);
|
||||
map.put(key, value);
|
||||
map.get(key);
|
||||
}
|
||||
|
|
@ -56,11 +60,11 @@ public class ConcurrentMapPerformanceManualTest {
|
|||
return 1;
|
||||
}
|
||||
}
|
||||
int executeTimes = 5000;
|
||||
final int executeTimes = 5000;
|
||||
|
||||
Map<SameHash, Integer> mapOfSameHash = new ConcurrentHashMap<>();
|
||||
final Map<SameHash, Integer> mapOfSameHash = new ConcurrentHashMap<>();
|
||||
ExecutorService executorService = Executors.newFixedThreadPool(2);
|
||||
long sameHashStartTime = System.currentTimeMillis();
|
||||
final long sameHashStartTime = System.currentTimeMillis();
|
||||
for (int i = 0; i < 2; i++) {
|
||||
executorService.execute(() -> {
|
||||
for (int j = 0; j < executeTimes; j++) {
|
||||
|
|
@ -71,10 +75,10 @@ public class ConcurrentMapPerformanceManualTest {
|
|||
executorService.shutdown();
|
||||
executorService.awaitTermination(5, TimeUnit.SECONDS);
|
||||
|
||||
long mapOfSameHashDuration = System.currentTimeMillis() - sameHashStartTime;
|
||||
Map<Object, Integer> mapOfDefaultHash = new ConcurrentHashMap<>();
|
||||
final long mapOfSameHashDuration = System.currentTimeMillis() - sameHashStartTime;
|
||||
final Map<Object, Integer> mapOfDefaultHash = new ConcurrentHashMap<>();
|
||||
executorService = Executors.newFixedThreadPool(2);
|
||||
long defaultHashStartTime = System.currentTimeMillis();
|
||||
final long defaultHashStartTime = System.currentTimeMillis();
|
||||
for (int i = 0; i < 2; i++) {
|
||||
executorService.execute(() -> {
|
||||
for (int j = 0; j < executeTimes; j++) {
|
||||
|
|
@ -85,11 +89,11 @@ public class ConcurrentMapPerformanceManualTest {
|
|||
executorService.shutdown();
|
||||
executorService.awaitTermination(5, TimeUnit.SECONDS);
|
||||
|
||||
long mapOfDefaultHashDuration = System.currentTimeMillis() - defaultHashStartTime;
|
||||
final long mapOfDefaultHashDuration = System.currentTimeMillis() - defaultHashStartTime;
|
||||
assertEquals(executeTimes * 2, mapOfDefaultHash.size());
|
||||
assertEquals(executeTimes * 2, mapOfSameHash.size());
|
||||
System.out.println(String.format("same-hash: %s, default-hash: %s", mapOfSameHashDuration, mapOfDefaultHashDuration));
|
||||
assertTrue("same hashCode() should greatly degrade performance", mapOfSameHashDuration > mapOfDefaultHashDuration * 10);
|
||||
assertTrue("same hashCode() should greatly degrade performance", mapOfSameHashDuration > (mapOfDefaultHashDuration * 10));
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,13 @@
|
|||
*.class
|
||||
|
||||
#folders#
|
||||
/target
|
||||
/neoDb*
|
||||
/data
|
||||
/src/main/webapp/WEB-INF/classes
|
||||
*/META-INF/*
|
||||
|
||||
# Packaged files #
|
||||
*.jar
|
||||
*.war
|
||||
*.ear
|
||||
|
|
@ -23,7 +23,6 @@
|
|||
- [Guide to Java Reflection](http://www.baeldung.com/java-reflection)
|
||||
- [A Guide to Java Sockets](http://www.baeldung.com/a-guide-to-java-sockets)
|
||||
- [Java 8 Collectors](http://www.baeldung.com/java-8-collectors)
|
||||
- [Guide To CompletableFuture](http://www.baeldung.com/java-completablefuture)
|
||||
- [Guide to Java 8’s Functional Interfaces](http://www.baeldung.com/java-8-functional-interfaces)
|
||||
- [Convert char to String in Java](http://www.baeldung.com/java-convert-char-to-string)
|
||||
- [Random List Element](http://www.baeldung.com/java-random-list-element)
|
||||
|
|
@ -31,12 +30,10 @@
|
|||
- [Java 8 – Powerful Comparison with Lambdas](http://www.baeldung.com/java-8-sort-lambda)
|
||||
- [Java – Directory Size](http://www.baeldung.com/java-folder-size)
|
||||
- [Java – Try with Resources](http://www.baeldung.com/java-try-with-resources)
|
||||
- [A Guide to the Java ExecutorService](http://www.baeldung.com/java-executor-service-tutorial)
|
||||
- [Java 8 New Features](http://www.baeldung.com/java-8-new-features)
|
||||
- [Lambda Expressions and Functional Interfaces: Tips and Best Practices](http://www.baeldung.com/java-8-lambda-expressions-tips)
|
||||
- [The Double Colon Operator in Java 8](http://www.baeldung.com/java-8-double-colon-operator)
|
||||
- [Java 8 Streams Advanced](http://www.baeldung.com/java-8-streams)
|
||||
- [Introduction to Thread Pools in Java](http://www.baeldung.com/thread-pool-java-and-guava)
|
||||
- [Introduction to Java 8 Streams](http://www.baeldung.com/java-8-streams-introduction)
|
||||
- [Guide to the Fork/Join Framework in Java](http://www.baeldung.com/java-fork-join)
|
||||
- [How to Print Screen in Java](http://www.baeldung.com/print-screen-in-java)
|
||||
|
|
@ -57,18 +54,11 @@
|
|||
- [The Basics of Java Generics](http://www.baeldung.com/java-generics)
|
||||
- [The Traveling Salesman Problem in Java](http://www.baeldung.com/java-simulated-annealing-for-traveling-salesman)
|
||||
- [How to Create an Executable JAR with Maven](http://www.baeldung.com/executable-jar-with-maven)
|
||||
- [Guide to java.util.concurrent.Future](http://www.baeldung.com/java-future)
|
||||
- [Guide to java.util.concurrent.BlockingQueue](http://www.baeldung.com/java-blocking-queue)
|
||||
- [Guide to CountDownLatch in Java](http://www.baeldung.com/java-countdown-latch)
|
||||
- [How to Design a Genetic Algorithm in Java](http://www.baeldung.com/java-genetic-algorithm)
|
||||
- [A Guide to ConcurrentMap](http://www.baeldung.com/java-concurrent-map)
|
||||
- [Guide to PriorityBlockingQueue in Java](http://www.baeldung.com/java-priority-blocking-queue)
|
||||
- [Guide to Java 8 groupingBy Collector](http://www.baeldung.com/java-groupingby-collector)
|
||||
- [Avoiding the ConcurrentModificationException in Java](http://www.baeldung.com/java-concurrentmodificationexception)
|
||||
- [Guide to WeakHashMap in Java](http://www.baeldung.com/java-weakhashmap)
|
||||
- [Strategy Design Pattern in Java 8](http://www.baeldung.com/java-strategy-pattern)
|
||||
- [Java 8 and Infinite Streams](http://www.baeldung.com/java-inifinite-streams)
|
||||
- [Custom Thread Pools In Java 8 Parallel Streams](http://www.baeldung.com/java-8-parallel-streams-custom-threadpool)
|
||||
- [String Operations with Java Streams](http://www.baeldung.com/java-stream-operations-on-strings)
|
||||
- [Spring Security – Cache Control Headers](http://www.baeldung.com/spring-security-cache-control-headers)
|
||||
- [Basic Introduction to JMX](http://www.baeldung.com/java-management-extensions)
|
||||
|
|
@ -91,7 +81,6 @@
|
|||
- [Avoiding ConcurrentModificationException when iterating and removing](http://www.baeldung.com/avoiding-concurrentmodificationexception-when-iterating-and-removing)
|
||||
- [Removing all nulls from a List in Java](http://www.baeldung.com/java-remove-nulls-from-list)
|
||||
- [Removing all duplicates from a List in Java](http://www.baeldung.com/java-remove-duplicates-from-list)
|
||||
- [An Introduction to ThreadLocal in Java](http://www.baeldung.com/java-threadlocal)
|
||||
- [Using Math.pow in Java](http://www.baeldung.com/java-math-pow)
|
||||
- [Converting Strings to Enums in Java](http://www.baeldung.com/java-string-to-enum)
|
||||
- [Flattening Nested Collections in Java](http://www.baeldung.com/java-flatten-nested-collections)
|
||||
|
|
@ -101,19 +90,12 @@
|
|||
- [HashSet and TreeSet Comparison](http://www.baeldung.com/java-hashset-vs-treeset)
|
||||
- [How to Perform a Simple HTTP Request in Java](http://www.baeldung.com/java-http-request)
|
||||
- [Call Methods at Runtime Using Java Reflection](http://www.baeldung.com/java-method-reflection)
|
||||
- [Guide to DelayQueue](http://www.baeldung.com/java-delay-queue)
|
||||
- [Guide to UUID in JAVA](http://www.baeldung.com/guide-to-uuid-in-java)
|
||||
- [Comparing getPath(), getAbsolutePath(), and getCanonicalPath() in Java](http://www.baeldung.com/java-path)
|
||||
- [How to Add a Single Element to a Stream](http://www.baeldung.com/java-stream-append-prepend)
|
||||
- [Iterating Over Enum Values in Java](http://www.baeldung.com/java-enum-iteration)
|
||||
- [A Guide to Java SynchronousQueue](http://www.baeldung.com/java-synchronous-queue)
|
||||
- [Guide to the Java TransferQueue](http://www.baeldung.com/java-transfer-queue)
|
||||
- [Kotlin Java Interoperability](http://www.baeldung.com/kotlin-java-interoperability)
|
||||
- [Guide to the ConcurrentSkipListMap](http://www.baeldung.com/java-concurrent-skip-list-map)
|
||||
- [Difference Between Wait and Sleep in Java](http://www.baeldung.com/java-wait-and-sleep)
|
||||
- [LongAdder and LongAccumulator in Java](http://www.baeldung.com/java-longadder-and-longaccumulator)
|
||||
- [Using Java MappedByteBuffer](http://www.baeldung.com/java-mapped-byte-buffer)
|
||||
- [The Dining Philosophers Problem in Java](http://www.baeldung.com/java-dining-philoshophers)
|
||||
- [The Difference Between map() and flatMap()](http://www.baeldung.com/java-difference-map-and-flatmap)
|
||||
- [How to Round a Number to N Decimal Places in Java](http://www.baeldung.com/java-round-decimal-number)
|
||||
- [Changing Annotation Parameters At Runtime](http://www.baeldung.com/java-reflection-change-annotation-params)
|
||||
|
|
@ -122,21 +104,17 @@
|
|||
- [Changing the Order in a Sum Operation Can Produce Different Results?](http://www.baeldung.com/java-floating-point-sum-order)
|
||||
- [How to Get a Name of a Method Being Executed?](http://www.baeldung.com/java-name-of-executing-method)
|
||||
- [Iterate over a Map in Java](http://www.baeldung.com/java-iterate-map)
|
||||
- [CyclicBarrier in Java](http://www.baeldung.com/java-cyclic-barrier)
|
||||
- [Dynamic Proxies in Java](http://www.baeldung.com/java-dynamic-proxies)
|
||||
- [How to Copy an Array in Java](http://www.baeldung.com/java-array-copy)
|
||||
- [Introduction to JDBC](http://www.baeldung.com/java-jdbc)
|
||||
- [Guide to CopyOnWriteArrayList](http://www.baeldung.com/java-copy-on-write-arraylist)
|
||||
- [Period and Duration in Java](http://www.baeldung.com/java-period-duration)
|
||||
- [Converting a Stack Trace to a String in Java](http://www.baeldung.com/java-stacktrace-to-string)
|
||||
- [Guide to the Java Phaser](http://www.baeldung.com/java-phaser)
|
||||
- [Count Occurrences of a Char in a String](http://www.baeldung.com/java-count-chars)
|
||||
- [Java Double Brace Initialization](http://www.baeldung.com/java-double-brace-initialization)
|
||||
- [The StackOverflowError in Java](http://www.baeldung.com/java-stack-overflow-error)
|
||||
- [Split a String in Java](http://www.baeldung.com/java-split-string)
|
||||
- [Introduction to Java Serialization](http://www.baeldung.com/java-serialization)
|
||||
- [How to Remove the Last Character of a String?](http://www.baeldung.com/java-remove-last-character-of-string)
|
||||
- [Guide to Synchronized Keyword in Java](http://www.baeldung.com/java-synchronized)
|
||||
- [ClassNotFoundException vs NoClassDefFoundError](http://www.baeldung.com/java-classnotfoundexception-and-noclassdeffounderror)
|
||||
- [Guide to UUID in Java](http://www.baeldung.com/java-uuid)
|
||||
- [How to Get the Last Element of a Stream in Java?](http://www.baeldung.com/java-stream-last-element)
|
||||
|
|
|
|||
Loading…
Reference in New Issue