Unchecked exception handling

[ArvindReddySheelam]

Refactor validateIconSize method: Remove redundant exception handling and improve JavaDoc

• Removed unnecessary try-catch blocks for RuntimeException and Exception, which were redundant and unlikely to provide meaningful error information.
• Added detailed JavaDoc to describe the purpose of the method, the parameters, and the conditions under which a SecurityException is thrown.
• Added @nonnull annotation to the iconSize parameter to ensure it's not null.
• Simplified exception message to include the invalid iconSize value for better debugging context.

Description:

This PR refactors the validateIconSize method to address feedback regarding redundant exception handling and code formatting. The following changes have been made:

Redundant Exception Handling Removed: The unnecessary try-catch blocks for RuntimeException and Exception have been removed. The method now focuses solely on throwing a SecurityException when the iconSize does not match the expected pattern.

Enhanced JavaDoc: A Detailed JavaDoc has been added to clarify the method's functionality, including descriptions of the parameters and any exceptions that may be thrown.

@nonnull Annotation: The @nonnull annotation has been added to the iconSize parameter to prevent NullPointerException and ensure the method's input is always valid.

Simplified Exception Message: The exception message now includes the invalid iconSize value to provide better context in the event of an error.

[zbynek]

Removed unnecessary try-catch blocks for RuntimeException and Exception,
This PR refactors the validateIconSize method

What you're saying is basically that you discarded some changes from your previous PR, but that's not relevant for review of this one.

Here you're just adding Javadoc and documenting that an argument is not null.

Please fix the formatting errors.
Please use the PR template with all the checkboxes.

[daniel-beck]

Also, do not open a new PR. Update this one.