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

Example
The following example shows how to create a try..finally statement. Because code in the
finally block is guaranteed to execute, it is typically used to perform any necessary clean-up
after a try block executes. In the following example, setInterval()calls a function every
1000 millisecond (1 second). If an error occurs, an error is thrown and is caught by the catch
block. The finally block is always executed whether or not an error occurs. Because
setInterval() is used, clearInterval() must be placed in the finally block to ensure
that the interval is cleared from memory.
myFunction = function () {
trace("this is myFunction");
};
try {
myInterval = setInterval(this, "myFunction", 1000);
throw new Error("my error");
}
catch (myError:Error) {
trace("error caught: "+myError);
}
finally {
clearInterval(myInterval);
trace("error is cleared");
}
In the following example, the finally block is used to delete an ActionScript object,
regardless of whether an error occurred. Create a new AS file called Account.as.
class Account {
var balance:Number = 1000;
function getAccountInfo():Number {
return (Math.round(Math.random() * 10) % 2);
}
}
In the same directory as Account.as, create a new AS or FLA document and enter the
following ActionScript in Frame 1 of the Timeline:
import Account;
var account:Account = new Account();
try {
var returnVal = account.getAccountInfo();
if (returnVal != 0) {
throw new Error("Error getting account information.");
}
}
finally {
if (account != null) {
delete account;
}
}
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