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Top 5 Design Pattern Courses for Experienced Java Programmers - Best of Lot Hello Java programmers, if you want to learn Design patterns in 2022 and looking for the best resources like books, tutorials, and online courses then you have come to the right place. Earlier, I... Read: http://www.java67.com/2022/01/top-5-courses-to-learn-design-patterns.html

Top 5 Blockchain Courses and Certifications for Beginners in 2022 - Best of Lot Hello guys, If you're involved in the cryptocurrency space, then you've probably heard about Blockchain. Unless you're living under a rock…  I'm talking about this new technology... Read: http://www.java67.com/2021/12/top-5-courses-to-learn-blockchain.html

Top 6 Deep Learning and Neural Networks Courses and Certifications to Learn in 2022 - Best of Lot Hello guys, if you are looking for the best online courses to learn Deep Learning and Neural networks in 2022 then you have come to the right place.  In the past, I have shared the best Data... Read: http://www.java67.com/2022/01/top-6-deep-learning-and-neural-networks.html

Top 5 Courses to Learn MySQL Database in 2022 - Best of Lot Hello guys, if you want to learn MySQL and SQL in 2022 and looking for the best resources like online courses, tutorials, and books then you have come to the right place. Earlier, I have shared... Read: http://www.java67.com/2021/11/top-5-courses-to-learn-mysql-database.html

Top 5 Online Courses to Learn Hibernate and Spring Data JPA in 2022 - Best of Lot Hello Java programmers, if you want to learn Hibernate and Spring Data JPA, two of the leading persistence framework for enterprise Java development, and need the best resources like books,... Read: http://www.java67.com/2021/11/best-hibernate-and-spring-data-jpa-courses.html

Top 6 Online Courses to Learn Spring Framework in 2022 - Best of Lot Hello Java developers, if you want to learn Spring Framework and look for the best resources like books, online courses, and tutorials, you have come to the right place. Earlier, I have shared... Read: http://www.java67.com/2021/11/5-best-spring-framework-courses-for.html

Java News Roundup: Payara Platform 2022 Roadmap, OpenJDK Drafts, Kotlin 1.6.20-M1, Gradle 7.4 This week's Java roundup for February 7th, 2022, features news from OpenJDK, JDK 18, JDK 19, JSR 381 approved by the JCP, Payara Platform 2022 roadmap, Quarkus 2.7.1, Helidon 2.4.2, Micronaut 3.3.1, Hibernate Search 6.1.1, Hibernate Reactive 1.1.3.Final, JReleaser Early-Access, Failsafe 3.2.1, Kotlin 1.6.20-M1, Gradle 7.4, Apache Tika 2.3.0 and end-of-life for Apache Tika 1.x release train. By Michael Redlich Read: https://www.infoq.com/news/2022/02/java-news-roundup-feb07-2022/

Top 20 Hibernate Interview Questions with Answers for Java Programmers Hibernate is one of the most popular persistent frameworks in the Java world. Hibernate offers an object to relational (ORM) solution which frees Java developers from writing tedious, hard to read,... Read: http://www.java67.com/2016/02/top-20-hibernate-interview-questions.html

} // Getter Setter methods according to the arguments } So these were some of the benefits of Hibernate over JDBC. Please do comment below if you are having any doubts. Read: Advantages of Hibernate Over JDBC?.

Advantages of Hibernate Over JDBC? Hibernate is a framework used in Java to ease the development of applications to interact with databases. On the other hand, JDBC is an API to connect and execute queries with database in Java. In this blog, we will be talking about the main advantages of hibernate over JDBC. Let’s discuss each of them one by one in detail. 1. Database Dependency The Hibernate is not dependent on the database whereas in the case of JDBC the queries that need to be written are dependent on the database. So if we are using some database like MySQL or PostgreSQL in beginning but in the later stage, we have the liability of switching to another database like oracle. It is so because hibernate creates XML configuration files therefore only these files are changed instead of the complete query. Let’s take an example in which we need to fetch data of the top 10 using a query. For SQL: SELECT TOP 10 name_of_column FROM name_of_table ORDER BY name_of_column ASC For PostgreSQL: SELECT name_of_column FROM name_of_table ORDER BY name_of_column ASC LIMIT 10 For Hibernate: Session.CreateQuery(“SELECT t. name_of_column FROM name_of_table t ORDER BY t.name_of_column ASC”).SetMaxResults(10).List() There is no change required in the query for hibernate. 2. Optimized Code Hibernate creates more shorter and optimized code. For example, by creating the connection while using Hibernate the developer should not need to write the complex queries because HCL is there to ease the written query whereas in JDBC it is the complete responsibility of the developer to program the queries. 3. Caching Hibernate comes up with the caching mechanism. When a query is running multiple times then it can store the value instead of checking it repeatedly from the database. It is responsible to increase the performance of your system whereas in the case of JDBC there isn’t any caching mechanism available. Hibernate comes up with two types of caching levels which are first level and second level. 4. Lazy Loading Lazy loading of data can be achieved with Hibernate. Lazy loading is a kind of data fetching mechanism and it helps in increasing performance. For example, if we have multiple child classes for parent classes but we need only some specific child classes to get loaded. Therefore through lazy loading, we can select some of the specific classes for execution. 5. Associations Associate mapping can be done while using Hibernate. We can use associations like one to one and one to many through annotations. This helps to manage the entity in an easier way. Let’s see an example of one to many mapping through the below program. Suppose we have two tables, the first one is BOX and the second one is ACCESSORIES. They are having one to many relations among them. Now let’s create two model classes Box and Accessories below: Box class: @Entity @Table(name="BOX") public class Box { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) @Column(name="box_id") private long id; @Column(name="name") private String name; @OneToMany(mappedBy="box") private Set<accessories accessories; // Getter Setter methods according to the arguments } Accessories class: @Entity @Table(name="ACCESSORIES") public class Accessories { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) @Column(name="id") private long id; @Column(name="accessory_id") private String accessoryId; @Column(name="accessory_total") private double accessoryTotal; @Column(name="quantity") private int quantity; @ManyToOne @JoinColumn(name="box_id", nullable=false) private Box box; //Hibernate requires no-args constructor public Items(){[...]

CompletableFuture in Java with Example - Tutorial Hello friends, we meet again today on our journey to Java. So I hope you guys are excited about our lesson. Let me ask you guys one thing before we proceed. Do you guys ever wonder about the future?... Read: http://www.java67.com/2022/02/completablefuture-in-java-with-example.html

Top Java Blogs Weekly: Best of 8/2022 Best of Top Java Blogs, year 2022, week 8 Read: https://www.topjavablogs.com/news/best-of-8-2022

[Solved] Caused by: java.sql.SQLSyntaxErrorException: ORA-01722: invalid number in Java and Oracle Hello guys, if you are getting below error in your Java program and wondering how to solve this or just stuck then you have come to the right place. In this article, I will explain to you what causes... Read: http://www.java67.com/2021/06/caused-by-java-01722-invalisqlsqlsyntaxerrorexception-ORA-01722-invalid-number.html

How to Parse JSON in Java Object using Jackson - Example Tutorial Hello guys, if you are wondering how to parse JSON in Java then don't worry, there are many options. In the last article, I have shown you 3 ways to parse JSON in Java in this example, You will... Read: http://www.java67.com/2015/02/how-to-parse-json-tofrom-java-object.html

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Spring Batch 5.0 M1 released On behalf of the team and everyone who contributed, I am pleased to announce that the first milestone release of Spring Batch 5.0 is available now from https://repo.spring.io/milestone. This first milestone includes a number of major changes such as requiring Java 17+, migrating to Jakarta EE 9 APIs as well as upgrading our dependencies across the portfolio to major versions such as Spring Framework 6.0. For a complete list of changes, please check the change log. We also took the opportunity of this major version to remove deprecated APIs and fix some issues that require non backward compatible changes. The migration guide contains more details about these changes and provides the upgrade instructions. As we continue our work on Spring Batch 5, we look forward to your feedback on this first milestone! Spring Batch Home | Source on GitHub Читать: https://spring.io/blog/2022/01/19/spring-batch-5-0-m1-released

Spring Data JDBC - How Can I Do a Partial Update of an Aggregate Root? This is the fourth article of a series about how to tackle various challenges you might encounter when using Spring Data JDBC. The series consists of: 1. Spring Data JDBC - How to Use Custom ID Generation. 2. Spring Data JDBC - How Do I Make Bidirectional Relationships? 3. Spring Data JDBC - How Do I Implement Caching? 4. Spring Data JDBC - How Can I Do a Partial Update of an Aggregate Root? (this article) If you are new to Spring Data JDBC, you should start by reading introduction and this article, which explains the relevance of aggregates in the context of Spring Data JDBC. Trust me. It is important. Spring Data JDBC is built around the idea of aggregates and repositories. Repositories are collection-like objects that find, load, save, and delete aggregates. Aggregates are clusters of objects that have a tight relationship and are internally consistent whenever program control is outside their methods. As such, aggregates also get loaded and persisted together in one atomic operation. However, Spring Data JDBC doesn’t keep track of how your aggregates change. Therefore, Spring Data JDBCs algorithm for persisting an aggregate minimizes the assumptions made about the database state. This is costly if your aggregate contains a collection of entities. For an example to show what happens, we once again turn to Minions. This Minion has a Set of Toys. class Minion { @Id Long id; String name; Color color = Color.YELLOW; Set<toy toys = new HashSet(); @Version int version; Minion(String name) { this.name = name; } @PersistenceConstructor private Minion(Long id, String name, Collection<toy toys, int version) { this.id = id; this.name = name; this.toys.addAll(toys); this.version = version; } Minion addToy(Toy toy) { toys.add(toy); return this; } } The schema for these classes looks like this: CREATE TABLE MINION ( ID IDENTITY PRIMARY KEY, NAME VARCHAR(255), COLOR VARCHAR(10), VERSION INT ); CREATE TABLE TOY ( MINION BIGINT NOT NULL, NAME VARCHAR(255) ); And the repository interface is trivial for now: interface MinionRepository extends CrudRepository<minion, {} If we save a Minion that already exists in the database, the following happens: 1. All Toys in the database of that minion get deleted. 2. The minion itself gets updated. 3. All the Toys that are currently part of that Minion get inserted into the database. This is wasteful when there are many toys and none of them changed, was deleted, or added. However, Spring Data JDBC does not have any information about this, and it should not, to keep it simple. Also, you might know more in your code than Spring Data or any other tool or library knows, and you might be able to take advantage of that knowledge. The next sections describe various ways of doing that. Use a Reduced View of the Aggregate Root Toys are an indispensable part of any proper minion but maybe there are domains that do not care about toys. If so, there is nothing wrong about having a PlainMinionmapped to the same table: @Table("MINION") class PlainMinion { @Id Long id; String name; @Version int version; } Since it does not know about toys, it lea[...]