src/pp.02.03-Lock/src/main/java/pp/Factory.java

@@ -3,6 +3,7 @@ package pp;
 public class Factory {
 
     private static Type instance;
+    private static Object lock = new Object();
 
     public static Type getInstance() {
         Type.prepare();

src/pp.04.01-RunnableReturn/README.md

@@ -1,7 +0,0 @@
-# Laboraufgabe "Thread für ``Runnable`` mit Rückgabewert"
-- [Aufgabenstellung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-01-RunnableWithResult.html)
-- [Musterlösung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-Solutions.html#laboraufgabe-thread-für-runnable-mit-rückgabewert)
-
-# Materialien
-- [Folien](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/slides/04-threadpools.html)
-- [Skript](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/notes/04-threadpools.html)

src/pp.04.01-RunnableReturn/justfile

@@ -1,12 +0,0 @@
-default:
-    mvn clean compile exec:java
-exec args:
-    mvn exec:java -Dexec.args={{args}}
-clean:
-    mvn clean
-compile:
-    mvn compile
-test:
-    mvn test
-javadoc:
-    mvn javadoc:javadoc

src/pp.04.01-RunnableReturn/pom.xml

@@ -1,61 +0,0 @@
-<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>pp</groupId>
-  <artifactId>pp.04.01-RunnableReturn</artifactId>
-  <version>1.0-SNAPSHOT</version>
-  <packaging>jar</packaging>
-
-  <properties>	
-    <exec.mainClass>pp.Main</exec.mainClass>
-    <maven.compiler.release>10</maven.compiler.release>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-  </properties>
-  <dependencies>
-    <dependency><!-- für Unit-Tests -->
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter</artifactId>
-      <version>5.10.0</version>
-      <scope>test</scope>
-    </dependency>
-    <dependency><!-- für Lombok -->
-      <groupId>org.projectlombok</groupId>
-      <artifactId>lombok</artifactId>
-      <version>1.18.30</version>
-      <scope>provided</scope>
-    </dependency>
-    <dependency><!-- für net.jcip Annotationen -->
-      <groupId>net.jcip</groupId>
-      <artifactId>jcip-annotations</artifactId>
-      <version>1.0</version>
-      <scope>provided</scope>
-    </dependency>
-  </dependencies>
-  <build>
-    <plugins>
-      <plugin><!-- für Unit-Tests [mvn test] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0</version>
-      </plugin>
-      <plugin><!-- [mvn compile] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.9.0</version>
-      </plugin>
-      <plugin><!-- [mvn exec:java] -->
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>exec-maven-plugin</artifactId>
-        <version>3.1.0</version>
-      </plugin>
-      <plugin><!-- [mvn javadoc:javadoc] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.5.0</version>
-        <configuration>
-          <show>private</show>
-          <locale>en_US</locale>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-</project>

src/pp.04.01-RunnableReturn/src/main/java/pp/Expression.java

@@ -1,6 +0,0 @@
-package pp;
-
-@FunctionalInterface
-public interface Expression<T> {
-    public T eval();
-}

src/pp.04.01-RunnableReturn/src/main/java/pp/Main.java

@@ -1,9 +0,0 @@
-package pp;
-
-public class Main {
-
-    public static void main(String... args) throws InterruptedException {
-        // hier programmieren
-    }
-
-}

src/pp.04.01-RunnableReturn/src/main/java/pp/RunnableWithResult.java

@@ -1,28 +0,0 @@
-package pp;
-
-public class RunnableWithResult<T> implements Runnable {
-    private final Expression<T> expr;
-
-    public RunnableWithResult(Expression<T> expr) {
-        this.expr = expr;
-    }
-
-    @Override
-    public void run() {
-        // hier programmieren
-    }
-
-    public synchronized Boolean isAvailable() {
-        // hier programmieren
-        return null;
-    }
-
-    public synchronized T get() {
-        // hier programmieren
-        return null;
-    }
-
-    public Expression<T> expr() {
-        return expr;
-    }
-}

src/pp.04.01-RunnableReturn_solution/README.md

@@ -1,7 +0,0 @@
-# Laboraufgabe "Thread für ``Runnable`` mit Rückgabewert"
-- [Aufgabenstellung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-01-RunnableWithResult.html)
-- [Musterlösung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-Solutions.html#laboraufgabe-thread-für-runnable-mit-rückgabewert)
-
-# Materialien
-- [Folien](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/slides/04-threadpools.html)
-- [Skript](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/notes/04-threadpools.html)

src/pp.04.01-RunnableReturn_solution/justfile

@@ -1,12 +0,0 @@
-default:
-    mvn clean compile exec:java
-exec args:
-    mvn exec:java -Dexec.args={{args}}
-clean:
-    mvn clean
-compile:
-    mvn compile
-test:
-    mvn test
-javadoc:
-    mvn javadoc:javadoc

src/pp.04.01-RunnableReturn_solution/pom.xml

@@ -1,61 +0,0 @@
-<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>pp</groupId>
-  <artifactId>pp.04.01-RunnableReturn_solution</artifactId>
-  <version>1.0-SNAPSHOT</version>
-  <packaging>jar</packaging>
-
-  <properties>	
-    <exec.mainClass>pp.Main</exec.mainClass>
-    <maven.compiler.release>10</maven.compiler.release>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-  </properties>
-  <dependencies>
-    <dependency><!-- für Unit-Tests -->
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter</artifactId>
-      <version>5.10.0</version>
-      <scope>test</scope>
-    </dependency>
-    <dependency><!-- für Lombok -->
-      <groupId>org.projectlombok</groupId>
-      <artifactId>lombok</artifactId>
-      <version>1.18.30</version>
-      <scope>provided</scope>
-    </dependency>
-    <dependency><!-- für net.jcip Annotationen -->
-      <groupId>net.jcip</groupId>
-      <artifactId>jcip-annotations</artifactId>
-      <version>1.0</version>
-      <scope>provided</scope>
-    </dependency>
-  </dependencies>
-  <build>
-    <plugins>
-      <plugin><!-- für Unit-Tests [mvn test] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0</version>
-      </plugin>
-      <plugin><!-- [mvn compile] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.9.0</version>
-      </plugin>
-      <plugin><!-- [mvn exec:java] -->
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>exec-maven-plugin</artifactId>
-        <version>3.1.0</version>
-      </plugin>
-      <plugin><!-- [mvn javadoc:javadoc] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.5.0</version>
-        <configuration>
-          <show>private</show>
-          <locale>en_US</locale>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-</project>

src/pp.04.01-RunnableReturn_solution/src/main/java/pp/Expression.java

@@ -1,6 +0,0 @@
-package pp;
-
-@FunctionalInterface
-public interface Expression<T> {
-    public T eval();
-}

src/pp.04.01-RunnableReturn_solution/src/main/java/pp/Main.java

@@ -1,35 +0,0 @@
-package pp;
-
-public class Main {
-
-    public static void main(String... args) throws InterruptedException {
-        var r1 = new RunnableWithResult2<>(() -> {
-            try {
-                Thread.sleep(3000);
-            } catch (InterruptedException e) {
-                Thread.currentThread().interrupt();
-            }
-            return 1 + 2;
-        });
-        var r2 = new RunnableWithResult2<>(() -> 3 + 4);
-        var r3 = new RunnableWithResult2<>(() -> {
-            while (!r1.isAvailable() || !r2.isAvailable()) {
-                System.out.println("waiting on r1 or r2");
-            }
-            return r1.get() + r2.get();
-        });
-
-        var thread1 = new Thread(r1);
-        var thread2 = new Thread(r2);
-        var thread3 = new Thread(r3);
-
-        thread1.start();
-        thread2.start();
-        thread3.start();
-
-        while (!r3.isAvailable()) {
-            System.out.println("waiting on r3");
-        }
-        System.out.println("result: " + r3.get());
-    }
-}

src/pp.04.01-RunnableReturn_solution/src/main/java/pp/RunnableWithResult.java

@@ -1,28 +0,0 @@
-package pp;
-
-public class RunnableWithResult<T> implements Runnable {
-    private final Expression<T> expr;
-
-    public RunnableWithResult(Expression<T> expr) {
-        this.expr = expr;
-    }
-
-    @Override
-    public void run() {
-        // hier programmieren
-    }
-
-    public synchronized Boolean isAvailable() {
-        // hier programmieren
-        return null;
-    }
-
-    public synchronized T get() {
-        // hier programmieren
-        return null;
-    }
-
-    public Expression<T> expr() {
-        return expr;
-    }
-}

src/pp.04.01-RunnableReturn_solution/src/main/java/pp/RunnableWithResult1.java

@@ -1,31 +0,0 @@
-package pp;
-
-public class RunnableWithResult1<T> extends RunnableWithResult<T> {
-    private T result;
-    private boolean finished;
-
-    public RunnableWithResult1(Expression<T> expr) {
-        super(expr);
-    }
-
-    @Override
-    public void run() {
-        synchronized (this) { // Memorybarrier
-            this.finished = false;
-        }
-        this.result = expr().eval();
-        synchronized (this) {
-            this.finished = true;
-        } // Memorybarrier
-    }
-
-    @Override
-    public synchronized Boolean isAvailable() {
-        return this.finished;
-    }
-
-    @Override
-    public synchronized T get() {
-        return this.result;
-    }
-}

src/pp.04.01-RunnableReturn_solution/src/main/java/pp/RunnableWithResult2.java

@@ -1,26 +0,0 @@
-package pp;
-
-public class RunnableWithResult2<T> extends RunnableWithResult<T> {
-    private T result;
-    private volatile Thread self;
-
-    public RunnableWithResult2(Expression<T> expr) {
-        super(expr);
-    }
-
-    @Override
-    public void run() {
-        this.self = Thread.currentThread();
-        this.result = expr().eval();
-    }
-
-    @Override
-    public synchronized Boolean isAvailable() {
-        return (this.self != null) && !this.self.isAlive();
-    }
-
-    @Override
-    public synchronized T get() {
-        return this.result;
-    }
-}

src/pp.04.01-RunnableReturn_solution/src/main/java/pp/RunnableWithResult3.java

@@ -1,27 +0,0 @@
-package pp;
-
-public class RunnableWithResult3<T> extends RunnableWithResult<T> {
-    private T result;
-    private Thread executor;
-
-    public RunnableWithResult3(Expression<T> expr) {
-        super(expr);
-        this.executor = new Thread(this);
-        this.executor.start();
-    }
-
-    @Override
-    public void run() {
-        this.result = expr().eval();
-    }
-
-    @Override
-    public synchronized Boolean isAvailable() {
-        return (this.executor != null) && !this.executor.isAlive();
-    }
-
-    @Override
-    public synchronized T get() {
-        return this.result;
-    }
-}

src/pp.04.02-Future/README.md

@@ -1,7 +0,0 @@
-# Laboraufgabe "Asynchrone Ausführung mit ``Callable`` und ``Future``"
-- [Aufgabenstellung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-02-Future.html)
-- [Musterlösung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-Solutions.html#laboraufgabe-asynchrone-ausführung-mit-callable-und-future)
-
-# Materialien
-- [Folien](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/slides/04-threadpools.html)
-- [Skript](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/notes/04-threadpools.html)

src/pp.04.02-Future/justfile

@@ -1,12 +0,0 @@
-default:
-    mvn clean compile exec:java
-exec args:
-    mvn exec:java -Dexec.args={{args}}
-clean:
-    mvn clean
-compile:
-    mvn compile
-test:
-    mvn test
-javadoc:
-    mvn javadoc:javadoc

src/pp.04.02-Future/pom.xml

@@ -1,61 +0,0 @@
-<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>pp</groupId>
-  <artifactId>pp.04.02-Future</artifactId>
-  <version>1.0-SNAPSHOT</version>
-  <packaging>jar</packaging>
-
-  <properties>	
-    <exec.mainClass>pp.Main</exec.mainClass>
-    <maven.compiler.release>10</maven.compiler.release>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-  </properties>
-  <dependencies>
-    <dependency><!-- für Unit-Tests -->
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter</artifactId>
-      <version>5.10.0</version>
-      <scope>test</scope>
-    </dependency>
-    <dependency><!-- für Lombok -->
-      <groupId>org.projectlombok</groupId>
-      <artifactId>lombok</artifactId>
-      <version>1.18.30</version>
-      <scope>provided</scope>
-    </dependency>
-    <dependency><!-- für net.jcip Annotationen -->
-      <groupId>net.jcip</groupId>
-      <artifactId>jcip-annotations</artifactId>
-      <version>1.0</version>
-      <scope>provided</scope>
-    </dependency>
-  </dependencies>
-  <build>
-    <plugins>
-      <plugin><!-- für Unit-Tests [mvn test] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0</version>
-      </plugin>
-      <plugin><!-- [mvn compile] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.9.0</version>
-      </plugin>
-      <plugin><!-- [mvn exec:java] -->
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>exec-maven-plugin</artifactId>
-        <version>3.1.0</version>
-      </plugin>
-      <plugin><!-- [mvn javadoc:javadoc] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.5.0</version>
-        <configuration>
-          <show>private</show>
-          <locale>en_US</locale>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-</project>

src/pp.04.02-Future/src/main/java/pp/Main.java

@@ -1,13 +0,0 @@
-package pp;
-
-import java.util.concurrent.Executors;
-
-public class Main {
-
-    public static void main(String... args) {
-        var executor = Executors.newCachedThreadPool();
-        // hier programmieren
-        executor.shutdown();
-    }
-
-}

src/pp.04.02-Future_solution/README.md

@@ -1,7 +0,0 @@
-# Laboraufgabe "Asynchrone Ausführung mit ``Callable`` und ``Future``"
-- [Aufgabenstellung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-02-Future.html)
-- [Musterlösung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-Solutions.html#laboraufgabe-asynchrone-ausführung-mit-callable-und-future)
-
-# Materialien
-- [Folien](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/slides/04-threadpools.html)
-- [Skript](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/notes/04-threadpools.html)

src/pp.04.02-Future_solution/justfile

@@ -1,12 +0,0 @@
-default:
-    mvn clean compile exec:java
-exec args:
-    mvn exec:java -Dexec.args={{args}}
-clean:
-    mvn clean
-compile:
-    mvn compile
-test:
-    mvn test
-javadoc:
-    mvn javadoc:javadoc

src/pp.04.02-Future_solution/pom.xml

@@ -1,61 +0,0 @@
-<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>pp</groupId>
-  <artifactId>pp.04.02-Future_solution</artifactId>
-  <version>1.0-SNAPSHOT</version>
-  <packaging>jar</packaging>
-
-  <properties>	
-    <exec.mainClass>pp.Main</exec.mainClass>
-    <maven.compiler.release>10</maven.compiler.release>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-  </properties>
-  <dependencies>
-    <dependency><!-- für Unit-Tests -->
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter</artifactId>
-      <version>5.10.0</version>
-      <scope>test</scope>
-    </dependency>
-    <dependency><!-- für Lombok -->
-      <groupId>org.projectlombok</groupId>
-      <artifactId>lombok</artifactId>
-      <version>1.18.30</version>
-      <scope>provided</scope>
-    </dependency>
-    <dependency><!-- für net.jcip Annotationen -->
-      <groupId>net.jcip</groupId>
-      <artifactId>jcip-annotations</artifactId>
-      <version>1.0</version>
-      <scope>provided</scope>
-    </dependency>
-  </dependencies>
-  <build>
-    <plugins>
-      <plugin><!-- für Unit-Tests [mvn test] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0</version>
-      </plugin>
-      <plugin><!-- [mvn compile] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.9.0</version>
-      </plugin>
-      <plugin><!-- [mvn exec:java] -->
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>exec-maven-plugin</artifactId>
-        <version>3.1.0</version>
-      </plugin>
-      <plugin><!-- [mvn javadoc:javadoc] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.5.0</version>
-        <configuration>
-          <show>private</show>
-          <locale>en_US</locale>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-</project>

src/pp.04.02-Future_solution/src/main/java/pp/Main.java

@@ -1,34 +0,0 @@
-package pp;
-
-import java.util.concurrent.Callable;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.Executors;
-
-public class Main {
-
-    public static void main(String... args) {
-        var executor = Executors.newCachedThreadPool();
-        // Lambda-Ausdruck, mehrere Statements, explizites return
-        var f1 = executor.submit(() -> {
-            return 1.0 + 2.0;
-        });
-        // Callable als Inner Class
-        var f2 = executor.submit(new Callable<Double>() {
-            @Override
-            public Double call() throws Exception {
-                return 3.0 + 4.0;
-            }
-        });
-        // Lambda-Ausdruck, knapp
-        var f3 = executor.submit(() -> f1.get() + f2.get());
-        try {
-            // get() blockiert, bis etwas vorliegt (auch oben)
-            System.out.println(f3.get());
-        } catch (InterruptedException | ExecutionException e) {
-            // Exceptions in f1 und f2 werden bis zum f3.get() verzögert
-            Thread.currentThread().interrupt();
-        } finally {
-            executor.shutdown();
-        }
-    }
-}

src/pp.04.03-ThreadPoolSize/README.md

@@ -1,7 +0,0 @@
-# Laboraufgabe "Thread Pools"
-- [Aufgabenstellung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-03-ThreadPoolSize.html)
-- [Musterlösung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-Solutions.html#laboraufgabe-thread-pools)
-
-# Materialien
-- [Folien](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/slides/04-threadpools.html)
-- [Skript](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/notes/04-threadpools.html)

src/pp.04.03-ThreadPoolSize/justfile

@@ -1,12 +0,0 @@
-default:
-    mvn clean compile exec:java
-exec args:
-    mvn exec:java -Dexec.args={{args}}
-clean:
-    mvn clean
-compile:
-    mvn compile
-test:
-    mvn test
-javadoc:
-    mvn javadoc:javadoc

src/pp.04.03-ThreadPoolSize/pom.xml

@@ -1,61 +0,0 @@
-<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>pp</groupId>
-  <artifactId>pp.04.03-ThreadPoolSize</artifactId>
-  <version>1.0-SNAPSHOT</version>
-  <packaging>jar</packaging>
-
-  <properties>	
-    <exec.mainClass>pp.Task</exec.mainClass>
-    <maven.compiler.release>10</maven.compiler.release>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-  </properties>
-  <dependencies>
-    <dependency><!-- für Unit-Tests -->
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter</artifactId>
-      <version>5.10.0</version>
-      <scope>test</scope>
-    </dependency>
-    <dependency><!-- für Lombok -->
-      <groupId>org.projectlombok</groupId>
-      <artifactId>lombok</artifactId>
-      <version>1.18.30</version>
-      <scope>provided</scope>
-    </dependency>
-    <dependency><!-- für net.jcip Annotationen -->
-      <groupId>net.jcip</groupId>
-      <artifactId>jcip-annotations</artifactId>
-      <version>1.0</version>
-      <scope>provided</scope>
-    </dependency>
-  </dependencies>
-  <build>
-    <plugins>
-      <plugin><!-- für Unit-Tests [mvn test] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0</version>
-      </plugin>
-      <plugin><!-- [mvn compile] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.9.0</version>
-      </plugin>
-      <plugin><!-- [mvn exec:java] -->
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>exec-maven-plugin</artifactId>
-        <version>3.1.0</version>
-      </plugin>
-      <plugin><!-- [mvn javadoc:javadoc] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.5.0</version>
-        <configuration>
-          <show>private</show>
-          <locale>en_US</locale>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-</project>

src/pp.04.03-ThreadPoolSize/src/main/java/pp/CachedRunner.java

@@ -1,16 +0,0 @@
-package pp;
-
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-
-public class CachedRunner {
-
-    public static ExecutorService test(Runnable task, int tries) {
-        var pool = Executors.newCachedThreadPool();
-        for (var i = 1; i <= tries; i++) {
-            pool.execute(task);
-        }
-        return pool;
-    }
-
-}

src/pp.04.03-ThreadPoolSize/src/main/java/pp/FixedRunner.java

@@ -1,17 +0,0 @@
-package pp;
-
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-
-public class FixedRunner {
-    private final static int SIZE = 6;
-
-    public static ExecutorService test(Runnable task, int tries) {
-        var pool = Executors.newFixedThreadPool(SIZE);
-        for (var i = 1; i <= tries; i++) {
-            pool.execute(task);
-        }
-        return pool;
-    }
-
-}

src/pp.04.03-ThreadPoolSize/src/main/java/pp/Task.java

@@ -1,17 +0,0 @@
-package pp;
-
-public class Task implements Runnable {
-
-    private static final int NUMBER_OF_TASKS = 1;
-
-    @Override
-    public void run() {
-        // TODO
-    }
-
-    public static void main(String... args) {
-        // var pool = CachedRunner.test(new Task(), NUMBER_OF_TASKS);
-        var pool = FixedRunner.test(new Task(), NUMBER_OF_TASKS);
-    }
-
-}

src/pp.04.03-ThreadPoolSize_solution/README.md

@@ -1,7 +0,0 @@
-# Laboraufgabe "Thread Pools"
-- [Aufgabenstellung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-03-ThreadPoolSize.html)
-- [Musterlösung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/04-Solutions.html#laboraufgabe-thread-pools)
-
-# Materialien
-- [Folien](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/slides/04-threadpools.html)
-- [Skript](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/notes/04-threadpools.html)

src/pp.04.03-ThreadPoolSize_solution/justfile

@@ -1,20 +0,0 @@
-default:
-    mvn clean compile exec:java
-
-innerClass: (_exec "pp.TaskInnerClass" "")
-lambda: (_exec "pp.TaskLambda" "")
-staticClass: (_exec "pp.TaskStaticClass" "")
-
-_exec class args:
-    mvn exec:java -Dexec.mainClass={{class}} -Dexec.args={{args}}
-
-exec args:
-    mvn exec:java -Dexec.args={{args}}
-clean:
-    mvn clean
-compile:
-    mvn compile
-test:
-    mvn test
-javadoc:
-    mvn javadoc:javadoc

src/pp.04.03-ThreadPoolSize_solution/pom.xml

@@ -1,61 +0,0 @@
-<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>pp</groupId>
-  <artifactId>pp.04.03-ThreadPoolSize_solution</artifactId>
-  <version>1.0-SNAPSHOT</version>
-  <packaging>jar</packaging>
-
-  <properties>	
-    <exec.mainClass>pp.TaskLambda</exec.mainClass>
-    <maven.compiler.release>10</maven.compiler.release>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-  </properties>
-  <dependencies>
-    <dependency><!-- für Unit-Tests -->
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter</artifactId>
-      <version>5.10.0</version>
-      <scope>test</scope>
-    </dependency>
-    <dependency><!-- für Lombok -->
-      <groupId>org.projectlombok</groupId>
-      <artifactId>lombok</artifactId>
-      <version>1.18.30</version>
-      <scope>provided</scope>
-    </dependency>
-    <dependency><!-- für net.jcip Annotationen -->
-      <groupId>net.jcip</groupId>
-      <artifactId>jcip-annotations</artifactId>
-      <version>1.0</version>
-      <scope>provided</scope>
-    </dependency>
-  </dependencies>
-  <build>
-    <plugins>
-      <plugin><!-- für Unit-Tests [mvn test] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0</version>
-      </plugin>
-      <plugin><!-- [mvn compile] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.9.0</version>
-      </plugin>
-      <plugin><!-- [mvn exec:java] -->
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>exec-maven-plugin</artifactId>
-        <version>3.1.0</version>
-      </plugin>
-      <plugin><!-- [mvn javadoc:javadoc] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.5.0</version>
-        <configuration>
-          <show>private</show>
-          <locale>en_US</locale>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-</project>

src/pp.04.03-ThreadPoolSize_solution/src/main/java/pp/CachedRunner.java

@@ -1,16 +0,0 @@
-package pp;
-
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-
-public class CachedRunner {
-
-    public static ExecutorService test(Runnable task, int tries) {
-        var pool = Executors.newCachedThreadPool();
-        for (var i = 1; i <= tries; i++) {
-            pool.execute(task);
-        }
-        return pool;
-    }
-
-}

src/pp.04.03-ThreadPoolSize_solution/src/main/java/pp/FixedRunner.java

@@ -1,17 +0,0 @@
-package pp;
-
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-
-public class FixedRunner {
-    private final static int SIZE = 6;
-
-    public static ExecutorService test(Runnable task, int tries) {
-        var pool = Executors.newFixedThreadPool(SIZE);
-        for (var i = 1; i <= tries; i++) {
-            pool.execute(task);
-        }
-        return pool;
-    }
-
-}

src/pp.04.03-ThreadPoolSize_solution/src/main/java/pp/TaskInnerClass.java

@@ -1,34 +0,0 @@
-package pp;
-
-import java.util.concurrent.Executors;
-import java.util.concurrent.TimeUnit;
-
-public class TaskInnerClass {
-
-    private static final int NUMBER_OF_TASKS = 20;
-
-    public static void main(String... args) {
-        var pool1 = FixedRunner.test(new Runnable() {
-            @Override
-            public void run() {
-                System.out.println(Thread.currentThread().getName());
-            }
-        }, NUMBER_OF_TASKS);
-        var pool2 = CachedRunner.test(new Runnable() {
-            @Override
-            public void run() {
-                System.out.println(Thread.currentThread().getName());
-            }
-        }, NUMBER_OF_TASKS);
-        var scheduler = Executors.newSingleThreadScheduledExecutor();
-        scheduler.schedule(new Runnable() {
-            @Override
-            public void run() {
-                pool1.shutdown();
-                pool2.shutdown();
-                scheduler.shutdown();
-            }
-        }, 5, TimeUnit.SECONDS);
-    }
-
-}

src/pp.04.03-ThreadPoolSize_solution/src/main/java/pp/TaskLambda.java

@@ -1,24 +0,0 @@
-package pp;
-
-import java.util.concurrent.Executors;
-import java.util.concurrent.TimeUnit;
-
-public class TaskLambda {
-
-    private static final int NUMBER_OF_TASKS = 20;
-
-    public static void main(String... args) {
-        var pool1 = FixedRunner.test(
-                () -> System.out.println(Thread.currentThread().getName()),
-                NUMBER_OF_TASKS);
-        var pool2 = CachedRunner.test(
-                () -> System.out.println(Thread.currentThread().getName()),
-                NUMBER_OF_TASKS);
-        var scheduler = Executors.newSingleThreadScheduledExecutor();
-        scheduler.schedule(() -> {
-            pool1.shutdown();
-            pool2.shutdown();
-            scheduler.shutdown();
-        }, 5, TimeUnit.SECONDS);
-    }
-}

src/pp.04.03-ThreadPoolSize_solution/src/main/java/pp/TaskStaticClass.java

@@ -1,37 +0,0 @@
-package pp;
-
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
-
-public class TaskStaticClass implements Runnable {
-    static class Shutdowner implements Runnable {
-        @Override
-        public void run() {
-            pool1.shutdown();
-            pool2.shutdown();
-            scheduler.shutdown();
-        }
-    }
-
-    private static final int NUMBER_OF_TASKS = 20;
-    private static ExecutorService pool1;
-    private static ExecutorService pool2;
-    private static ScheduledExecutorService scheduler;
-
-    @Override
-    public void run() {
-        System.out.println(Thread.currentThread().getName());
-    }
-
-    public static void main(String... args) {
-        pool1 = FixedRunner.test(new TaskStaticClass(),
-                NUMBER_OF_TASKS);
-        pool2 = CachedRunner.test(new TaskStaticClass(),
-                NUMBER_OF_TASKS);
-        scheduler = Executors.newSingleThreadScheduledExecutor();
-        scheduler.schedule(new Shutdowner(), 5, TimeUnit.SECONDS);
-    }
-
-}

src/pp.05.01-CounterAtomic/README.md

@@ -1,7 +0,0 @@
-# Laboraufgabe "Counter mit Atomics threadsicher machen"
-- [Aufgabenstellung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/05-01-CounterAtomic.html)
-- [Musterlösung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/05-Solutions.html#laboraufgabe-counter-mit-atomics-threadsicher-machen)
-
-# Materialien
-- [Folien](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/slides/05-atomics.html)
-- [Skript](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/notes/05-atomics.html)

src/pp.05.01-CounterAtomic/justfile

@@ -1,12 +0,0 @@
-default:
-    mvn clean compile test
-exec args:
-    mvn exec:java -Dexec.args={{args}}
-clean:
-    mvn clean
-compile:
-    mvn compile
-test:
-    mvn test
-javadoc:
-    mvn javadoc:javadoc

src/pp.05.01-CounterAtomic/pom.xml

@@ -1,60 +0,0 @@
-<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>pp</groupId>
-  <artifactId>pp.05.01-CounterAtomic</artifactId>
-  <version>1.0-SNAPSHOT</version>
-  <packaging>jar</packaging>
-
-  <properties>	
-    <maven.compiler.release>10</maven.compiler.release>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-  </properties>
-  <dependencies>
-    <dependency><!-- für Unit-Tests -->
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter</artifactId>
-      <version>5.10.0</version>
-      <scope>test</scope>
-    </dependency>
-    <dependency><!-- für Lombok -->
-      <groupId>org.projectlombok</groupId>
-      <artifactId>lombok</artifactId>
-      <version>1.18.30</version>
-      <scope>provided</scope>
-    </dependency>
-    <dependency><!-- für net.jcip Annotationen -->
-      <groupId>net.jcip</groupId>
-      <artifactId>jcip-annotations</artifactId>
-      <version>1.0</version>
-      <scope>provided</scope>
-    </dependency>
-  </dependencies>
-  <build>
-    <plugins>
-      <plugin><!-- für Unit-Tests [mvn test] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0</version>
-      </plugin>
-      <plugin><!-- [mvn compile] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.9.0</version>
-      </plugin>
-      <plugin><!-- [mvn exec:java] -->
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>exec-maven-plugin</artifactId>
-        <version>3.1.0</version>
-      </plugin>
-      <plugin><!-- [mvn javadoc:javadoc] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.5.0</version>
-        <configuration>
-          <show>private</show>
-          <locale>en_US</locale>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-</project>

src/pp.05.01-CounterAtomic/src/main/java/pp/Counter.java

@@ -1,22 +0,0 @@
-package pp;
-
-class Counter {
-    private int c;
-
-    public Counter(int init) {
-        this.c = init;
-    }
-
-    public void inc() {
-        this.c++;
-    }
-
-    public void dec() {
-        this.c--;
-    }
-
-    public int get() {
-        return this.c;
-    }
-
-}

src/pp.05.01-CounterAtomic/src/test/java/pp/CounterTest.java

@@ -1,19 +0,0 @@
-package pp;
-
-import static org.junit.jupiter.api.Assertions.*;
-
-import org.junit.jupiter.api.Test;
-
-public class CounterTest {
-
-	@Test
-	public void testInc() throws InterruptedException {
-		fail();
-	}
-
-	@Test
-	public void testDec() throws InterruptedException {
-		fail();
-	}
-
-}

src/pp.05.01-CounterAtomic_solution/README.md

@@ -1,7 +0,0 @@
-# Laboraufgabe "Counter mit Atomics threadsicher machen"
-- [Aufgabenstellung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/05-01-CounterAtomic.html)
-- [Musterlösung](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/labs/05-Solutions.html#laboraufgabe-counter-mit-atomics-threadsicher-machen)
-
-# Materialien
-- [Folien](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/slides/05-atomics.html)
-- [Skript](https://services.informatik.hs-mannheim.de/~s.leuchter/pp/notes/05-atomics.html)

src/pp.05.01-CounterAtomic_solution/justfile

@@ -1,12 +0,0 @@
-default:
-    mvn clean compile test
-exec args:
-    mvn exec:java -Dexec.args={{args}}
-clean:
-    mvn clean
-compile:
-    mvn compile
-test:
-    mvn test
-javadoc:
-    mvn javadoc:javadoc

src/pp.05.01-CounterAtomic_solution/pom.xml

@@ -1,60 +0,0 @@
-<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>pp</groupId>
-  <artifactId>pp.05.01-CounterAtomic_solution</artifactId>
-  <version>1.0-SNAPSHOT</version>
-  <packaging>jar</packaging>
-
-  <properties>	
-    <maven.compiler.release>10</maven.compiler.release>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-  </properties>
-  <dependencies>
-    <dependency><!-- für Unit-Tests -->
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter</artifactId>
-      <version>5.10.0</version>
-      <scope>test</scope>
-    </dependency>
-    <dependency><!-- für Lombok -->
-      <groupId>org.projectlombok</groupId>
-      <artifactId>lombok</artifactId>
-      <version>1.18.30</version>
-      <scope>provided</scope>
-    </dependency>
-    <dependency><!-- für net.jcip Annotationen -->
-      <groupId>net.jcip</groupId>
-      <artifactId>jcip-annotations</artifactId>
-      <version>1.0</version>
-      <scope>provided</scope>
-    </dependency>
-  </dependencies>
-  <build>
-    <plugins>
-      <plugin><!-- für Unit-Tests [mvn test] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0</version>
-      </plugin>
-      <plugin><!-- [mvn compile] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.9.0</version>
-      </plugin>
-      <plugin><!-- [mvn exec:java] -->
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>exec-maven-plugin</artifactId>
-        <version>3.1.0</version>
-      </plugin>
-      <plugin><!-- [mvn javadoc:javadoc] -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.5.0</version>
-        <configuration>
-          <show>private</show>
-          <locale>en_US</locale>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-</project>

src/pp.05.01-CounterAtomic_solution/src/main/java/pp/AtomicCounter1.java

@@ -1,32 +0,0 @@
-package pp;
-
-import java.util.concurrent.atomic.AtomicInteger;
-
-class AtomicCounter1 implements ICounter {
-    private final AtomicInteger c;
-
-    public AtomicCounter1(int init) {
-        this.c = new AtomicInteger(init);
-    }
-
-    @Override
-    public void inc() {
-        var temp = this.c.get();
-        while (!this.c.compareAndSet(temp, temp + 1)) {
-            temp = this.c.get();
-        }
-    }
-
-    @Override
-    public void dec() {
-        var temp = this.c.get();
-        while (!this.c.compareAndSet(temp, temp - 1)) {
-            temp = this.c.get();
-        }
-    }
-
-    @Override
-    public int get() {
-        return this.c.get();
-    }
-}

src/pp.05.01-CounterAtomic_solution/src/main/java/pp/AtomicCounter2.java

@@ -1,26 +0,0 @@
-package pp;
-
-import java.util.concurrent.atomic.AtomicInteger;
-
-class AtomicCounter2 implements ICounter {
-    private final AtomicInteger c;
-
-    public AtomicCounter2(int init) {
-        this.c = new AtomicInteger(init);
-    }
-
-    @Override
-    public void inc() {
-        this.c.incrementAndGet();
-    }
-
-    @Override
-    public void dec() {
-        this.c.decrementAndGet();
-    }
-
-    @Override
-    public int get() {
-        return this.c.get();
-    }
-}

src/pp.05.01-CounterAtomic_solution/src/main/java/pp/AtomicCounter3.java

@@ -1,38 +0,0 @@
-package pp;
-
-import java.util.concurrent.atomic.AtomicInteger;
-
-class AtomicCounter3 implements ICounter {
-    private final AtomicInteger c;
-
-    public AtomicCounter3(int init) {
-        this.c = new AtomicInteger(init);
-    }
-
-    @Override
-    public void inc() {
-        for (;;) {
-            var current = this.c.get();
-            var next = current + 1;
-            if (this.c.compareAndSet(current, next)) {
-                break;
-            }
-        }
-    }
-
-    @Override
-    public void dec() {
-        for (;;) {
-            var current = this.c.get();
-            var next = current - 1;
-            if (this.c.compareAndSet(current, next)) {
-                break;
-            }
-        }
-    }
-
-    @Override
-    public int get() {
-        return this.c.get();
-    }
-}

src/pp.05.01-CounterAtomic_solution/src/main/java/pp/AtomicCounter4.java

@@ -1,26 +0,0 @@
-package pp;
-
-import java.util.concurrent.atomic.AtomicInteger;
-
-class AtomicCounter4 implements ICounter {
-    private final AtomicInteger c;
-
-    public AtomicCounter4(int init) {
-        this.c = new AtomicInteger(init);
-    }
-
-    @Override
-    public void inc() {
-        this.c.updateAndGet(i -> i + 1);
-    }
-
-    @Override
-    public void dec() {
-        this.c.updateAndGet(i -> i - 1);
-    }
-
-    @Override
-    public int get() {
-        return this.c.get();
-    }
-}

src/pp.05.01-CounterAtomic_solution/src/main/java/pp/Counter.java

@@ -1,24 +0,0 @@
-package pp;
-
-class Counter implements ICounter {
-    private int c;
-
-    public Counter(int init) {
-        this.c = init;
-    }
-
-    @Override
-    public void inc() {
-        this.c++;
-    }
-
-    @Override
-    public void dec() {
-        this.c--;
-    }
-
-    @Override
-    public int get() {
-        return this.c;
-    }
-}

src/pp.05.01-CounterAtomic_solution/src/main/java/pp/ICounter.java

@@ -1,11 +0,0 @@
-package pp;
-
-interface ICounter {
-
-    void inc();
-
-    void dec();
-
-    int get();
-
-}

src/pp.05.01-CounterAtomic_solution/src/main/java/pp/SynchronizedCounter.java

@@ -1,24 +0,0 @@
-package pp;
-
-class SynchronizedCounter implements ICounter {
-    private int c;
-
-    public SynchronizedCounter(int init) {
-        this.c = init;
-    }
-
-    @Override
-    public synchronized void inc() {
-        this.c++;
-    }
-
-    @Override
-    public synchronized void dec() {
-        this.c--;
-    }
-
-    @Override
-    public synchronized int get() {
-        return this.c;
-    }
-}

src/pp.05.01-CounterAtomic_solution/src/test/java/pp/CounterTest.java

@@ -1,116 +0,0 @@
-package pp;
-
-import static org.junit.jupiter.api.Assertions.*;
-
-import org.junit.jupiter.api.Test;
-
-class CounterTest {
-    private final static int RUNS = 500000;
-
-    private static void testIncrement(ICounter counter) {
-        assertEquals(0, counter.get());
-        var t1 = new Thread(() -> {
-            for (var j = 0; j < RUNS; j++) {
-                counter.inc();
-            }
-        });
-        var t2 = new Thread(() -> {
-            for (var j = 0; j < RUNS; j++) {
-                counter.inc();
-            }
-        });
-        t1.start();
-        t2.start();
-        try {
-            t1.join();
-            t2.join();
-        } catch (InterruptedException ex) {
-            Thread.currentThread().interrupt();
-        }
-        assertEquals(RUNS * 2, counter.get());
-    }
-
-    @Test
-    void testCounterIncrement() throws InterruptedException {
-        testIncrement(new Counter(0));
-    }
-
-    @Test
-    void testSynchronizedCounterIncrement() throws InterruptedException {
-        testIncrement(new SynchronizedCounter(0));
-    }
-
-    @Test
-    void testAtomicCounter1Increment() throws InterruptedException {
-        testIncrement(new AtomicCounter1(0));
-    }
-
-    @Test
-    void testAtomicCounter2Increment() throws InterruptedException {
-        testIncrement(new AtomicCounter2(0));
-    }
-
-    @Test
-    void testAtomicCounter3Increment() throws InterruptedException {
-        testIncrement(new AtomicCounter3(0));
-    }
-
-    @Test
-    void testAtomicCounter4Increment() throws InterruptedException {
-        testIncrement(new AtomicCounter4(0));
-    }
-
-    private static void testDecrement(ICounter counter) {
-        assertEquals(RUNS * 2, counter.get());
-        var t1 = new Thread(() -> {
-            for (var j = 0; j < RUNS; j++) {
-                counter.dec();
-            }
-        });
-        var t2 = new Thread(() -> {
-            for (var j = 0; j < RUNS; j++) {
-                counter.dec();
-            }
-        });
-        t1.start();
-        t2.start();
-        try {
-            t1.join();
-            t2.join();
-        } catch (InterruptedException ex) {
-            Thread.currentThread().interrupt();
-        }
-        assertEquals(0, counter.get());
-    }
-
-    @Test
-    void testCounterDecrement() throws InterruptedException {
-        testDecrement(new Counter(RUNS * 2));
-    }
-
-    @Test
-    void testSynchronizedCounterDecrement() throws InterruptedException {
-        testDecrement(new SynchronizedCounter(RUNS * 2));
-    }
-
-    @Test
-    void testAtomicCounter1Decrement() throws InterruptedException {
-        testDecrement(new AtomicCounter1(RUNS * 2));
-    }
-
-    @Test
-    void testAtomicCounter2Decrement() throws InterruptedException {
-        testDecrement(new AtomicCounter2(RUNS * 2));
-    }
-
-    @Test
-    void testAtomicCounter3Decrement() throws InterruptedException {
-        testDecrement(new AtomicCounter3(RUNS * 2));
-    }
-
-    @Test
-    void testAtomicCounter4Decrement() throws InterruptedException {
-        testDecrement(new AtomicCounter4(RUNS * 2));
-    }
-
-}