Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

Eclipse Plug-in Developer Guide
Previous Page Home Next Page

Error handling

SWT can trigger three types of exceptions: IllegalArgumentException, SWTException , and SWTError . Applications should not have to catch any other kind of exception or error when calling SWT.

Note: If any other exception besides these three is thrown from SWT, it should be considered a bug in the SWT implementation.

Where possible, exceptions are triggered consistently across platforms. However, some errors are specific to an SWT implementation on a particular platform.

IllegalArgumentException

The arguments passed in SWT API methods are checked for appropriate state and range before any other work is done. An IllegalArgumentException will be thrown when it is determined that an argument is invalid.

Code that causes an IllegalArgumentException on one platform will cause the same exception on a different platform.

SWTException

SWTException is thrown when a recoverable error occurs internally in SWT. The error code and message text provide a further description of the problem.

SWT remains in a known stable state after throwing the exception. For example, this exception is thrown when an SWT call is made from a non-UI thread.

SWTError

SWTError is thrown when an unrecoverable error occurs inside SWT.

SWT will throw this error when an underlying platform call fails, leaving SWT in an unknown state, or when SWT is known to have an unrecoverable error, such as running out of platform graphics resources.

Once an SWT error has occurred, there is little that an application can do to correct the problem. These errors should not be encountered during normal course of operation in an application, but high reliability applications should still catch and report the errors.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire