Learn how to inspect a JSON array and check if it contains a particular key-value pair.
Search Results for: If exist
Check if a Specified Key Exists in a Given S3 Bucket Using Java
Learn how to check if a specified key exists in an Amazon S3 bucket using Java.
Check if an Enum Value Exists in Java
Learn various ways to search enums in Java.
How to Check if a Database Table Exists with JDBC
Have a look at how we can check if a table exists in the database using JDBC and pure SQL.
Checking if a Class Exists in Java
Explore the nuances of using Class.forName() to check the existence of a class in the Java classpath
Check If a File or Directory Exists in Java
Learn how to check if a file or directory exists in Java
Checking if a URL Exists in Java
Learn how to check if a URL exists in Java using the GET and HEAD HTTP methods
How to Check If a Key Exists in a Map
Learn how to check if a key exists in a Map in Java and a common pitfall.
Perform Action Only if All Optionals Are Available
Learn how to perform an action only if all optionals are available.
Difference Between Lombok @AllArgsConstructor, @RequiredArgsConstructor and @NoArgConstructor
Learn about different constructor generation annotations in Lombok and when to use them.
The Difference Between Throwing an Exception and Mono.error() in Spring Webflux
In this tutorial, we learn the differences between throwing an exception and Mono.error() in Spring WebFlux.
Check if a Number Is a Happy Number in Java
Learn how to check if a number is a happy or sad number in Java.
Understanding Kafka InstanceAlreadyExistsException in Java
Explore the significance of the InstanceAlreadyExistsException within Apache Kafka and how to mitigate the issue.
Difference Between flush() and close() in Java FileWriter
Learn about FileWriter’s common usage and delve into the differences between its flush() and close() methods.
Check if List Contains at Least One Enum
Learn how to quickly check if List contains at least one enum value
Check If a Java StringBuilder Object Contains a Character
Explore several approaches to chеck if a Java StringBuildеr objеct contains a specific character.
Difference Between execute() and submit() in Executor Service
Explore the key differences between execute() and submit() in Executor Service.
Check if a double Is an Integer in Java
Explore the various techniques available to check whether a double is, in fact, a mathematical integer.
Differences Between * and ? in Cron Expressions
Learn the differences between the asterisk and the question mark special characters in cron expressions.
Difference Between putIfAbsent() and computeIfAbsent() in Java’s Map
Learn the differences between Java Map’s putIfAbsent() and computeIfAbsent() through examples.