Deploying a Java application involves making your application accessible and runnable on a server or target environment where users can interact with it. The deployment process can vary depending on the type of application (e.g., web application, standalone desktop application, or mobile application) and the hosting environment (e.g., web server, cloud server, or local machine). Here are some common deployment scenarios for Java applications:

1. **Web Application Deployment**:
   If you are deploying a Java web application (e.g., a Java EE or Spring web application), the typical steps involve packaging your application into a WAR (Web Application Archive) file and deploying it to a web server or application server like Apache Tomcat, WildFly, or Jetty. Here are the general steps:

   - Build your web application using a build tool like Apache Maven or Gradle.
   - Package your application into a WAR file using the build tool.
   - Deploy the WAR file to the web server or application server.

   The exact steps may vary based on your chosen build tool and server. Refer to the documentation of your build tool and server for specific instructions.

2. **Standalone Desktop Application Deployment**:
   For standalone desktop applications developed using Java Swing or JavaFX, deployment typically involves creating a distributable package that can be installed and run on users' local machines. Consider using tools like Java Web Start (deprecated) or packaging tools like Java Packager (part of JavaFX) to create platform-specific installers or executable JAR files.

   - Package your application into an executable JAR file.
   - Create platform-specific installers or distribution packages (e.g., EXE or DMG files) using tools like Java Packager or third-party tools (e.g., Inno Setup, NSIS for Windows).
   - Distribute the installer or JAR file to end users.

3. **Server Application Deployment**:
   If you are deploying a Java server application, like a backend service or REST API, the steps typically involve packaging your application into a runnable JAR or WAR file and deploying it on a server or cloud platform like AWS, Azure, or Google Cloud.

   - Build your server application using a build tool.
   - Package your application into a JAR or WAR file.
   - Deploy the JAR file to a server (e.g., using SSH) or deploy the WAR file to a servlet container or application server.
   - Configure the server environment, including database connections and environment variables.
   - Start and manage the application using server-specific tools.

4. **Mobile Application Deployment**:
   For Android applications developed in Java, you deploy your app to the Google Play Store. For Java-based iOS applications (using tools like RoboVM or Multi-OS Engine), you package and distribute the app through the Apple App Store. The deployment process for mobile apps involves creating distribution packages, following the respective platform's guidelines, and publishing on the app store.

5. **Cloud Deployment**:
   Deploying Java applications to cloud platforms like AWS, Azure, Google Cloud, or Heroku involves creating virtual machines, containers, or serverless functions, configuring the environment, and deploying your application code. Each cloud provider offers specific tools and services for deploying Java applications, such as AWS Elastic Beanstalk, Azure App Service, Google App Engine, or Heroku.

Before deploying any application, it's essential to thoroughly test it in the target environment to ensure that it functions correctly and meets performance and scalability requirements. Additionally, consider setting up monitoring and error tracking to identify and address issues in production.

The specific deployment process can vary widely based on your application's type, target environment, and chosen technologies. Always refer to the documentation and best practices provided by your chosen tools, frameworks, and hosting platforms for detailed deployment instructions.