new module (#747)

* new module

* delays

* added readme file for this module

* renaming file and package

* commit

* commit

* commit

Co-authored-by: Brandon Ward <[email protected]>

* update

* Spacing fix to re-trigger build.

* update

* fix test to past the CI build

---------

Co-authored-by: Brandon Ward <[email protected]>

Author: kanake10

core-kotlin-modules/core-kotlin-concurrency-3/README.md

@@ -0,0 +1,5 @@
+## Core Kotlin Concurrency
+
+This module contains articles about concurrency in Kotlin.
+
+### Relevant articles:

core-kotlin-modules/core-kotlin-concurrency-3/pom.xml

@@ -0,0 +1,28 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>core-kotlin-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>core-kotlin-concurrency-3</artifactId>
+    <packaging>jar</packaging>
+
+    <name>core-kotlin-concurrency-3</name>
+    <url>http://maven.apache.org</url>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>3.8.1</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>

core-kotlin-modules/core-kotlin-concurrency-3/src/main/java/com/baeldung/comparedelays/CompareDelays.kt

@@ -0,0 +1,38 @@
+package com.baeldung.comparedelays
+
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.*
+
+val lock = Object()
+
+fun main() {
+    runBlocking(Dispatchers.Default) {
+        launch(Dispatchers.IO) {
+            testWaitThread1()
+        }
+        launch(Dispatchers.IO) {
+            testWaitThread2()
+        }
+    }
+}
+
+fun testWaitThread1() = synchronized(lock) {
+    lock.wait()
+    println("Print first")
+}
+
+fun testWaitThread2() = synchronized(lock) {
+    println("Print second")
+    lock.notify()
+}
+fun sleepMethod() {
+    println("Thread 1 is sleeping...")
+    Thread.sleep(2000) // Sleep for 2 seconds
+    println("Thread 1 woke up!")
+}
+fun delayMethod() = runBlocking {
+    println("Coroutine 1 is delaying...")
+    delay(2000) // Delay for 2 seconds
+    println("Coroutine 1 resumed!")
+}

core-kotlin-modules/core-kotlin-date-time/src/test/kotlin/com/baeldung/currentdatetime/CurrentDateTImeUnitTest.kt

@@ -53,7 +53,7 @@ class CurrentDateTImeUnitTest {
 
         val current = LocalDateTime.of(
             calendar.get(Calendar.YEAR),
-            calendar.get(Calendar.MONTH + 1),
+            calendar.get(Calendar.MONTH) + 1,
             calendar.get(Calendar.DAY_OF_MONTH),
             calendar.get(Calendar.HOUR_OF_DAY),
             calendar.get(Calendar.MINUTE),

core-kotlin-modules/pom.xml

@@ -61,6 +61,7 @@
         <module>core-kotlin-string-conversions</module>
         <module>core-kotlin-files</module>
         <module>core-kotlin-operators</module>
+        <module>core-kotlin-concurrency-3</module>
     </modules>
 
 </project>