Quick Reminder: Default Values for Java Data Types

In Java, each primitive data type has a default value automatically assigned when declaring an uninitialized variable.

 

Understanding these default values is essential to prevent runtime errors. Below is a table summarizing this information.

 

Data Type Default Value
byte 0
char '\u0000'
short 0
int 0
float 0.0f
long 0L
double 0.0d

Commentaires

Enregistrer un commentaire

Posts les plus consultés de ce blog

Restoring the Local Changes Tab in IntelliJ IDEA (2024)

Image
Restoring the Local Changes Tab in IntelliJ IDEA (2024) Local change tab not showing up in last version of IntelliJ (2024) :  In the latest version of IntelliJ IDEA(2024), the Local Changes and Shelf features have been moved to a separate Commit tool window on the left. If you prefer the old behavior and layout, follow these steps:     Open IntelliJ IDEA.     Go to Version Control in the settings.     Under the Commit section, uncheck the option for “ Use non-modal commit interface ” The familiar Local Changes tab will now appear inside the Git tool window. That’s it! You’ll have the Local Changes tab back as before. Enjoy 😊
Lire la suite

Circular Dependency Warning in IntelliJ with Maven in a Java Web Project

Image
Circular Dependency Warning in IntelliJ with Maven in a Java Web Project : When working with a Java web project using Maven, you may encounter a circular dependency warning in IntelliJ. This can happen when a module depends on another module that also depends on the first module, creating a loop. The warning indicates that adding a new dependency may create a circular dependency and lead to a build failure. To solve this issue, you can try several solutions :  Split your project into smaller modules with clear responsibilities. This can help you identify and manage dependencies more effectively. For example, you can move the HrRestApiConnectionException class to a separate module and then include that module as a dependency in the modules that need it. Use Maven exclusions: Another way to solve circular dependency issues is to use Maven exclusions to remove unnecessary dependencies. You can specify the dependencies that you want to exclude from your module in the pom.xml file. For...
Lire la suite

Resolving Concurrency Conflicts in Java REST APIs: A Case of 412 Precondition Failed

Image
  Resolving Concurrency Conflicts in Java REST APIs: A Case of 412 Precondition Failed   While developing a Java REST API, we encountered a perplexing issue: two deployed endpoints were returning unexpected results. The first endpoint called operated correctly, while the second returned a 412 Precondition Failed error . This behavior was consistent regardless of the calling order of the endpoints. Upon investigation, we discovered that the issue was related to concurrency management and the ETags returned by our API. By refining the entity version comparison logic, focusing on specific attributes such as the ID or other relevant fields, we resolved this conflict and ensured the smooth operation of our endpoints. While this was the solution to our particular issue, it’s important to remember that similar symptoms can stem from different underlying problems. However, if you’re facing a similar challenge, it’s worth taking a closer look at the concurrency m...
Lire la suite