In Java, it is important to properly close objects to release system resources and avoid memory leaks. Here are some best practices for closing objects in Java:

1. Use try-with-resources: The try-with-resources statement is a convenient way to automatically close resources such as streams, readers, and writers. It ensures that the close method is called on the resource, even if an exception is thrown.

2. Close resources in a finally block: If you are not using try-with-resources, make sure to close the resources in a finally block to ensure that they are closed regardless of whether an exception is thrown.

3. Close resources in the reverse order of their creation: If you are dealing with multiple resources, make sure to close them in the reverse order of their creation to avoid potential resource leaks.

4. Check for null before closing: Before calling the close method on an object, always check to see if the object is null to avoid NullPointerException.

5. Handle exceptions properly: When closing resources, handle any exceptions that may be thrown. It is important to handle exceptions gracefully and log any errors that occur during the closing process.

By following these best practices, you can ensure that your Java application efficiently manages system resources and avoids memory leaks. Properly closing objects will help improve the performance and reliability of your code.