new commit

Author: Beerkay

JavaMultiThreadingCodes/build.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!-- You may freely edit this file. See commented blocks below for -->
+<!-- some examples of how to customize the build. -->
+<!-- (If you delete it and reopen the project it will be recreated.) -->
+<!-- By default, only the Clean and Build commands use this build script. -->
+<!-- Commands such as Run, Debug, and Test only use this build script if -->
+<!-- the Compile on Save feature is turned off for the project. -->
+<!-- You can turn off the Compile on Save (or Deploy on Save) setting -->
+<!-- in the project's Project Properties dialog box.-->
+<project name="JavaMultiThreadingCodes" default="default" basedir=".">
+    <description>Builds, tests, and runs the project JavaMultiThreadingCodes.</description>
+    <import file="nbproject/build-impl.xml"/>
+    <!--
+
+    There exist several targets which are by default empty and which can be 
+    used for execution of your tasks. These targets are usually executed 
+    before and after some main targets. They are: 
+
+      -pre-init:                 called before initialization of project properties
+      -post-init:                called after initialization of project properties
+      -pre-compile:              called before javac compilation
+      -post-compile:             called after javac compilation
+      -pre-compile-single:       called before javac compilation of single file
+      -post-compile-single:      called after javac compilation of single file
+      -pre-compile-test:         called before javac compilation of JUnit tests
+      -post-compile-test:        called after javac compilation of JUnit tests
+      -pre-compile-test-single:  called before javac compilation of single JUnit test
+      -post-compile-test-single: called after javac compilation of single JUunit test
+      -pre-jar:                  called before JAR building
+      -post-jar:                 called after JAR building
+      -post-clean:               called after cleaning build products
+
+    (Targets beginning with '-' are not intended to be called on their own.)
+
+    Example of inserting an obfuscator after compilation could look like this:
+
+        <target name="-post-compile">
+            <obfuscate>
+                <fileset dir="${build.classes.dir}"/>
+            </obfuscate>
+        </target>
+
+    For list of available properties check the imported 
+    nbproject/build-impl.xml file. 
+
+
+    Another way to customize the build is by overriding existing main targets.
+    The targets of interest are: 
+
+      -init-macrodef-javac:     defines macro for javac compilation
+      -init-macrodef-junit:     defines macro for junit execution
+      -init-macrodef-debug:     defines macro for class debugging
+      -init-macrodef-java:      defines macro for class execution
+      -do-jar:                  JAR building
+      run:                      execution of project 
+      -javadoc-build:           Javadoc generation
+      test-report:              JUnit report generation
+
+    An example of overriding the target for project execution could look like this:
+
+        <target name="run" depends="JavaMultiThreadingCodes-impl.jar">
+            <exec dir="bin" executable="launcher.exe">
+                <arg file="${dist.jar}"/>
+            </exec>
+        </target>
+
+    Notice that the overridden target depends on the jar target and not only on 
+    the compile target as the regular run target does. Again, for a list of available 
+    properties which you can use, check the target you are overriding in the
+    nbproject/build-impl.xml file. 
+
+    -->
+</project>

JavaMultiThreadingCodes/manifest.mf

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+Manifest-Version: 1.0
+X-COMMENT: Main-Class will be added automatically by build
+

JavaMultiThreadingCodes/nbproject/build-impl.xml

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+build.xml.data.CRC32=4d3d93c3
+build.xml.script.CRC32=a6a26692
+build.xml.stylesheet.CRC32=[email protected]
+# This file is used by a NetBeans-based IDE to track changes in generated files such as build-impl.xml.
+# Do not edit this file. You may delete it but then the IDE will never regenerate such files for you.
+nbproject/build-impl.xml.data.CRC32=4d3d93c3
+nbproject/build-impl.xml.script.CRC32=fa6ba560
+nbproject/build-impl.xml.stylesheet.CRC32=[email protected]

JavaMultiThreadingCodes/nbproject/genfiles.properties

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+annotation.processing.enabled=true
+annotation.processing.enabled.in.editor=false
+annotation.processing.processor.options=
+annotation.processing.processors.list=
+annotation.processing.run.all.processors=true
+annotation.processing.source.output=${build.generated.sources.dir}/ap-source-output
+build.classes.dir=${build.dir}/classes
+build.classes.excludes=**/*.java,**/*.form
+# This directory is removed when the project is cleaned:
+build.dir=build
+build.generated.dir=${build.dir}/generated
+build.generated.sources.dir=${build.dir}/generated-sources
+# Only compile against the classpath explicitly listed here:
+build.sysclasspath=ignore
+build.test.classes.dir=${build.dir}/test/classes
+build.test.results.dir=${build.dir}/test/results
+# Uncomment to specify the preferred debugger connection transport:
+#debug.transport=dt_socket
+debug.classpath=\
+    ${run.classpath}
+debug.test.classpath=\
+    ${run.test.classpath}
+# Files in build.classes.dir which should be excluded from distribution jar
+dist.archive.excludes=
+# This directory is removed when the project is cleaned:
+dist.dir=dist
+dist.jar=${dist.dir}/JavaMultiThreadingCodes.jar
+dist.javadoc.dir=${dist.dir}/javadoc
+excludes=
+includes=**
+jar.compress=false
+javac.classpath=
+# Space-separated list of extra javac options
+javac.compilerargs=
+javac.deprecation=false
+javac.processorpath=\
+    ${javac.classpath}
+javac.source=1.7
+javac.target=1.7
+javac.test.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+javac.test.processorpath=\
+    ${javac.test.classpath}
+javadoc.additionalparam=
+javadoc.author=false
+javadoc.encoding=${source.encoding}
+javadoc.noindex=false
+javadoc.nonavbar=false
+javadoc.notree=false
+javadoc.private=false
+javadoc.splitindex=true
+javadoc.use=true
+javadoc.version=false
+javadoc.windowtitle=
+main.class=javaapplication7.JavaApplication7
+manifest.file=manifest.mf
+meta.inf.dir=${src.dir}/META-INF
+mkdist.disabled=false
+platform.active=default_platform
+run.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+# Space-separated list of JVM arguments used when running the project.
+# You may also define separate properties like run-sys-prop.name=value instead of -Dname=value.
+# To set system properties for unit tests define test-sys-prop.name=value:
+run.jvmargs=
+run.test.classpath=\
+    ${javac.test.classpath}:\
+    ${build.test.classes.dir}
+source.encoding=UTF-8
+src.dir=src
+test.src.dir=test

JavaMultiThreadingCodes/nbproject/project.properties

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://www.netbeans.org/ns/project/1">
+    <type>org.netbeans.modules.java.j2seproject</type>
+    <configuration>
+        <data xmlns="http://www.netbeans.org/ns/j2se-project/3">
+            <name>JavaMultiThreadingCodes</name>
+            <source-roots>
+                <root id="src.dir"/>
+            </source-roots>
+            <test-roots>
+                <root id="test.src.dir"/>
+            </test-roots>
+        </data>
+    </configuration>
+</project>

JavaMultiThreadingCodes/nbproject/project.xml

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+package CallableAndFuture_13;
+
+/**
+ * Callable and Future in Java to get results from your threads and to allow
+ * your threads to throw exceptions. Plus, Future allows you to control your
+ * threads, checking to see if they’re running or not, waiting for results and
+ * even interrupting them or descheduling them.
+ *
+ * Runnable is default abstraction for creating a task in Java. It has a single
+ * method run() that accepts no arguments and returns no value, nor it can throw
+ * any checked exception. To overcome these limitations, Java 5 introduced a new
+ * task abstraction through Callable interface.
+ *
+ * Codes with minor comments are from http://www.caveofprogramming.com/youtube/
+ * also freely available at
+ * https://www.udemy.com/java-multithreading/?couponCode=FREE
+ *
+ * @author Z.B. Celik <[email protected]>
+ */
+import java.io.IOException;
+import java.util.Random;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+public class App {
+
+    public static void main(String[] args) throws InterruptedException {
+        ExecutorService executor = Executors.newCachedThreadPool();
+        //anonymous call of Callable
+        Future<Integer> future = executor.submit(new Callable<Integer>() {
+
+            @Override
+            //return value is Integer
+            public Integer call() throws Exception {
+                Random random = new Random();
+                int duration = random.nextInt(4000);
+                if (duration > 2000) {
+                    throw new IOException("Sleeping for too long.");
+                }
+                System.out.println("Starting ...");
+
+                try {
+                    Thread.sleep(duration);
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+                System.out.println("Finished.");
+                return duration;
+            }
+        });
+
+        executor.shutdown();
+        executor.awaitTermination(1, TimeUnit.DAYS);
+        try {
+            //get returned value from call()
+            System.out.println("Result is: " + future.get());
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        } catch (ExecutionException e) {
+            IOException ex = (IOException) e.getCause();
+            System.out.println(ex.getMessage());
+        }
+    }
+
+}

JavaMultiThreadingCodes/src/CallableAndFuture_13/App.java

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+package CallableAndFuture_13;
+
+/**
+ * Understanding Callable
+ *
+ * @author Z.B. Celik <[email protected]>
+ */
+import java.util.ArrayList;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+class MyCallable implements Callable<Integer> {
+
+    Integer value;
+
+    public MyCallable(Integer i) {
+        this.value = i;
+    }
+
+    @Override
+    public Integer call() throws Exception {
+        Integer sum = 0;
+        for (int i = 0; i < value; i++) {
+            sum += i;
+        }
+        System.out.println("Sum in Callable.Call() " + sum);
+        return sum;
+    }
+
+}
+
+public class App2 {
+
+    public static void main(String[] args) throws InterruptedException {
+        ArrayList<Integer> list = new ArrayList<>();
+        ExecutorService executor = Executors.newCachedThreadPool();
+        Future<Integer> future = null;
+        Callable<Integer> callable = null;
+        for (int i = 1; i < 10; i++) {
+            future = executor.submit(new MyCallable(i));
+            try {
+                list.add(future.get());
+            } catch (ExecutionException ex) {
+                System.out.println(ex.getMessage());
+            }
+        }
+
+        executor.shutdown();
+        executor.awaitTermination(1, TimeUnit.DAYS);
+        for (int i = 0; i < list.size(); i++) {
+            //get returned values from call()
+            System.out.println("List Values " + i + " Value: " + list.get(i));
+
+        }
+    }
+}

JavaMultiThreadingCodes/src/CallableAndFuture_13/App2.java

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+package CallableAndFuture_13;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.ScheduledThreadPoolExecutor;
+
+/**
+ * Source:http://java-x.blogspot.com.tr/2006/11/java-5-concurrency-callable-and-future.html
+ * Till Java 1.4, threads could be implemented by either implementing Runnable
+ * or extending Thread. This was quite simple, but had a serious limitation -
+ * They have a run method that cannot return values. In order to side-step this,
+ * most programmers use side-effects (writing to a file etc.) to mimic returning
+ * values to the invoker of the thread. Java 5 introduces the Callable
+ * interface, that allows users to return values from a thread
+ *
+ * Runnable vs Callable<T>
+ * Runnable Introduced in Java 1.0 Callable<T> Introduced in Java 1.5 as part of
+ * java.util.concurrent library
+ *
+ * Runnable cannot be parameterized Callable is a parameterized type whose type
+ * parameter indicates the return type of its run method Classes implementing
+ *
+ * Runnable needs to implement run() method, classes implementing Callable needs
+ * to implement call() method
+ *
+ * Runnable.run() returns no value, Callable.call() returns a value of Type T
+ *
+ * Runnable can not throw checked exceptions, Callable can throw checked
+ * exceptions
+ *
+ * @author Z.B. Celik <[email protected]>
+ */
+class CallableImpl implements Callable<Integer> {
+
+    private int myName;
+
+    CallableImpl(int i) {
+        myName = i;
+    }
+
+    @Override
+    public Integer call() {
+        for (int i = 0; i < 10; i++) {
+            System.out.println("Thread : " + getMyName() + " value is : " + i);
+        }
+        return getMyName();
+    }
+
+    public int getMyName() {
+        return myName;
+    }
+
+    public void setMyName(int myName) {
+        this.myName = myName;
+    }
+}
+
+public class CallableTester {
+
+    public static void main(String[] args) {
+
+        Callable<Integer> callable = new CallableImpl(2);
+        ExecutorService executor = new ScheduledThreadPoolExecutor(1);
+        Future<Integer> future = executor.submit(callable);
+
+        try {
+            System.out.println("Future value: " + future.get());
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            executor.shutdown();
+            executor.isTerminated();
+        }
+    }
+
+}