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FLEX 2-PROGRAMMING ACTIONSCRIPT 3.0
Manual
Handling Synchronous Errors In An Application - Adobe FLEX 2-PROGRAMMING ACTIONSCRIPT 3.0 Manual
Programming actionscript 3.0
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{
tf.text = error.toString();
}
If the
readBoolean()
the following message would be displayed in the
of file was encountered."
The same code in a release version of Flash Player would display the following text:
"EOFError: Error #2030."
In order to keep Flash Player's resources and size to a minimum in the release version, error
message strings are not present. You can look up the error number in the documentation (the
appendixes of the ActionScript 3.0 Language Reference) to correlate to an error message.
Alternatively, you can reproduce the error using the debugger version of Flash Player to see the
full message.
Handling synchronous errors in an
application
The most common error handling is synchronous error handling logic, where you insert
statments into your code to catch synchronous errors at run time. This type of error handling
lets your application notice and recover from run-time errors when functions fail. The logic
for catching a synchronous error includes
try an operation, catch any error response from Flash Player, and finally execute some other
operation to handle the failed operation.
Using try..catch..finally statements
When you work with synchronous run-time errors, use the
statements to catch errors. When a run-time error occurs, Flash Player throws an exception,
which means that Flash Player suspends normal execution and creates a special object of type
Error. The Error object is then thrown to the first available
The
statement encloses statements that have the potential to create errors. You always use
try
the
statement with a
catch
the
statement block, the
try
execute.
method threw an EOFError in the debugger version of Flash Player,
try..catch..finally
statement. If an error is detected in one of the statements in
try
statements that are attached to that
catch
text field: "EOFError: Error #2030: End
tf
statements, which literally
try..catch..finally
block.
catch
Handling synchronous errors in an application
statement will
try
261
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Chapters
Table of Contents
3
3 Actionscript Language and Syntax
35
4 Object-Oriented Programming In Actionscript
107
Display Programming
159
Working with Strings
209
Working with Arrays
227
Handling Errors
255
Using Regular Expressions
285
Working with XML
311
Handling Events
345
1 4 Networking and Communication
371
Working with Geometry
417
Flash Player Security
449
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