jdk 21: The new features in Java 21

JDK 21 is scheduled to be released in September 2023 as specified in JSR 395.

The main 3 features included in JDK 21 are

According to OpenJDK, a sequenced collection has first and last elements, and the elements between them have successors and predecessors. A sequenced collection supports common operations at either end, and it supports processing the elements from first to last and from last to first (i.e., forward and reverse).

b) Virtual Threads

According to OpenJDK, Virtual threads are lightweight threads that dramatically reduce the effort of writing, maintaining, and observing high-throughput concurrent applications.

c) String Templates (Preview)

According to OpenJDK, Enhance the Java programming language with string templates. String templates complement Java's existing string literals and text blocks by coupling literal text with embedded expressions and template processors to produce specialized results

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Eclipse - Server Tomcat v8.5 Server at localhost failed to start.

When I try to launch the tomcat from Eclipse, I encountered the following error Server Tomcat v8.5 Server at localhost failed to start. Solution Step 1 Delete the .snap file located at the following location eclipse workspace Path\ .metadata\.plugins\org.eclipse.core.resources Step 2 Delete the tmp0 folder from the following path eclipse workspace Path \.metadata\.plugins\org.eclipse.wst.server.core Step 3 Delete the server from servers list Step 4 Remove already added Tomcat Server i) Click on Define a new Server ii) Select Server Runtime Environments iii) Select the Tomcat Server and remove it as follows Remove Selected Server Step 5 Make sure that correct version of Server is configured in Project Properties Step 6 Restart the Eclipse IDE.

Intellij : How to add @author comment to every new class

Introduction In this tutorial, we will learn how to add @author comments to every new class that we create. We can achieve it using either of the following two solutions Solution 1: Automatically add @author comments to every new class using Files and Code Templates Open File -> Settings -> Editor -> File and Code Templates -> Includes Click on Includes . Under File Header , enter the following comments text /** * @author ${USER} * @Date ${DATE} */ Intellij - add @author comments Solution 2: Autocompletion of @author Open File -> Settings -> Editor -> Live Templates Select Java and then click on + button In Abbreviation, enter @a In template text , enter the following comments /** * @author ${USER} * @Date ${DATE} */ In option , Expands with select SPACE Intellij - Autocompletion @author You can simply add the @author comments by typing @a and then click SPACE

hibernate-release-5.4.4.Final - Required Jars

Introduction Hibernate (Object Relational Mapping framework) is an implementation of Java Persistence API (JPA) specification. Required Jars for Hibernate 5.4.4 Following Jars resided inside the required folder are the mandatory jars required for Hibernate 5.4.4 antlr-2.7.7.jar byte-buddy-1.9.11.jar classmate-1.3.4.jar dom4j-2.1.1.jar FastInfoset-1.2.15.jar hibernate-commons-annotations-5.1.0.Final.jar hibernate-core-5.4.4.Final.jar istack-commons-runtime-3.0.7.jar jandex-2.0.5.Final.jar javassist-3.24.0-GA.jar javax.activation-api-1.2.0.jar javax.persistence-api-2.2.jar jaxb-api-2.3.1.jar jaxb-runtime-2.3.1.jar jboss-logging-3.3.2.Final.jar jboss-transaction-api_1.2_spec-1.1.1.Final.jar stax-ex-1.8.jar txw2-2.3.1.jar Hibernate 5.4.4 release is compatible with Java 8 or 11 JPA 2.2 References https://hibernate.org/orm/releases/5.4/

Techie Shah

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