You can search for the unique identifier of an error message in the Javadoc reference pages to receive an explanation about the content of the error message.
The following section provides a detailed explanation of each error message. The error messages are organized by unique identifiers. For each error message, the following types of information are provided, when applicable:
Unique identifier, displayed as a heading.
Description of the parameters used in the error message.
Example of the error message as it is displayed to a user. This example is provided if the error message uses parameters to show how the error message will be displayed when elements, such as a class name, are substituted for the parameters.
Cause, or reason why the error message was generated, and background or referential information that is helpful for understanding the error message.
Solution, including steps you can take to resolve the error are provided when available.