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Enterprise Java
Resolving Spring Boot H2 JdbcSQLSyntaxErrorException: “Table not found”
Spring Boot makes it easy to develop Spring applications with its pre-configured components. However, we often encounter the JdbcSQLSyntaxErrorException: Table…
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Enterprise Java
Automatically Saving Child Entities in JPA
In JPA applications, we often encounter entities with parent-child relationships. Persisting these entities efficiently involves saving the parent and automatically…
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Core Java
Converting Between java.sql.Timestamp and ZonedDateTime in Java
In Java, conversion between java.sql.Timestamp and java.time.ZonedDateTime can be essential for applications that interact with legacy systems that require this…
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Core Java
Collectors.toMap() vs Collectors.groupingBy() in Java Streams
Java Streams offer powerful ways to process collections of elements. Two common operations involve transforming a stream into a map:…
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Core Java
Finding a Key’s Index in Java LinkedHashMap
The Java LinkedHashMap class combines a hash table and linked list to maintain predictable iteration order, unlike HashMap. However, LinkedHashMap…
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Core Java
Unit Testing of ExecutorService in Java With No Thread sleep
Unit testing concurrent code, especially code utilizing ExecutorService, presents unique challenges due to its asynchronous nature. Traditional approaches often involve…
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Core Java
Casting Maps into Complex Objects in Java
In Java, there is often a need to convert a Map to a complex object (POJO – Plain Old Java…
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Core Java
Preventing IndexOutOfBoundsException with List.subList() in Java
The List.subList() method in Java allows you to create a view of a portion of a list, defined by a…
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Core Java
Implement Elvis Operator in Java 8
In Java 8, the Elvis operator (often written as ?: in Groovy and Kotlin) is not available as a built-in…
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