FLASH® LITE™ 2.x - Adobe Help and Support

Example
In this example, a function named checkEmail() checks whether the string that is passed to
it is a properly formatted e-mail address. If the string does not contain an @ symbol, the
function throws an error.
function checkEmail(email:String) {
if (email.indexOf("@") == -1) {
throw new Error("Invalid email address");
}
}
checkEmail("someuser_theirdomain.com");
The following code then calls the checkEmail() function within a try code block. If the
email_txtstring does not contain a valid e-mail address, the error message appears in a text
field (error_txt).
try {
checkEmail("Joe Smith");
}
catch (e) {
error_txt.text = e.toString();
}
In the following example, a subclass of the Error class is thrown. The checkEmail() function
is modified to throw an instance of that subclass.
// Define Error subclass InvalidEmailError // In InvalidEmailError.as:
class InvalidEmailAddress extends Error { var message = "Invalid email
address."; }
In a FLA or AS file, enter the following ActionScript in Frame 1 of the Timeline:
import InvalidEmailAddress;
function checkEmail(email:String) {
if (email.indexOf("@") == -1) {
throw new InvalidEmailAddress();
}
}
try {
checkEmail("Joe Smith");
}
catch (e) {
this.createTextField("error_txt", this.getNextHighestDepth(), 0, 0, 100,
22);
error_txt.autoSize = true;
error_txt.text = e.toString();
}
See also
Error
Statements 201