chore(task_periodic): initial commit

task_periodic/.gitignore

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+
+# Files
+.classpath
+.externalToolBuilders
+.gradle
+.project
+.pydevproject
+.settings
+.sonar
+*~
+*.ipr
+*.iml
+*.iws
+*.swp
+*.DS_Store
+*.snap.debug
+dependency-reduced-pom.xml
+
+# Directories
+.idea/
+.run/
+.venv/
+_site/
+build/
+dist/
+docs/_build/
+gen-java/
+gen-javabean/
+gen-py/
+node_modules/
+target/

task_periodic/README.md

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+# Overview
+This project shows periodic tasks in Java.
+
+# Links

task_periodic/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <name>task_periodic</name>
+    <description>description</description>
+    <url>https://swingbe.de</url>
+    <groupId>org.swingbe.de</groupId>
+    <artifactId>task_periodic</artifactId>
+    <version>0.0.1</version>
+    <packaging>jar</packaging>
+
+    <licenses>
+        <license>
+            <name>GNU General Public License</name>
+            <url>https://www.gnu.org/licenses/gpl-3.0.txt</url>
+        </license>
+    </licenses>
+
+    <scm>
+        <url>https://github.com/Software-Ingenieur-Begerad/sandbox-java</url>
+    </scm>
+
+    <properties>
+        <!-- Other properties -->
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <!-- Target Java versions -->
+                    <release>11</release>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.2.1</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <filters>
+                                <filter>
+                                    <!-- exclude signatures from merged JAR to avoid invalid signature messages -->
+                                    <artifact>*:*</artifact>
+                                    <excludes>
+                                        <exclude>META-INF/*.SF</exclude>
+                                        <exclude>META-INF/*.DSA</exclude>
+                                        <exclude>META-INF/*.RSA</exclude>
+                                    </excludes>
+                                </filter>
+                            </filters>
+                            <!-- The shaded JAR will not be the main artifact for the project, it will be attached
+                              for deployment in the way source and docs are. -->
+                            <shadedArtifactAttached>true
+                            </shadedArtifactAttached>
+                            <shadedClassifierName>shaded</shadedClassifierName>
+                            <transformers>
+                                <transformer
+                                        implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+                                <transformer
+                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <manifestEntries>
+                                        <Main-Class>de.swingbe.task_periodic.Main
+                                        </Main-Class>
+                                    </manifestEntries>
+                                </transformer>
+                            </transformers>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

task_periodic/src/main/java/de/swingbe/task_periodic/Main.java

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+package de.swingbe.task_periodic;
+
+import java.util.Timer;
+
+public class Main {
+
+    public static void main(String[] args) {
+        System.out.println("Hello world!");
+
+        //instantiate Timer object
+        Timer time = new Timer();
+
+        //instantiate ScheduledTask class
+        ScheduledTask st = new ScheduledTask();
+
+        //create repetitively task for every 1 secs
+        time.schedule(st, 0, 1000);
+
+        //for demo only.
+        for (int i = 0; i < 5; i++) {
+            System.out.println("Execution in Main Thread...." + i);
+            try {
+                Thread.sleep(2000);
+            } catch (InterruptedException e) {
+                System.out.println("Another thread has interrupted this one");
+                e.printStackTrace();
+            }
+            if (i == 4) {
+                System.out.println("Application Terminates");
+                System.exit(0);
+            }
+        }
+        return;
+    }
+}

task_periodic/src/main/java/de/swingbe/task_periodic/ScheduledTask.java

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+package de.swingbe.task_periodic;
+
+import java.util.Date;
+import java.util.TimerTask;
+
+public class ScheduledTask extends TimerTask {
+
+    //to display current time
+    Date now;
+
+    //ddd your task here
+    public void run() {
+
+        //initialize date
+        now = new Date();
+
+        //display current time
+        System.out.println("Time is :" + now);
+    }
+}