With some relevant information on the as3.0, someone may think that it is in another language. Fundamental change in its Which? What it is? Now we have to relax a little bit if you familiar as2.0, then it The change is not great, or even increase the number of orders you can use. 

  As3.0 from our first glance, it is not a new language, it is better in the framework of AS2.0, you will find these FLASH8 start. Anything have their own category and sub-category clean. Category Inheritance looks very complicated, but it is very easy to understand. 

  The main change: 

  LeftPeak / rightPeak Property 
  Right-channel current amplitude of the voice, from 0-1 
  IsBuffering: Boolean [read-only] 
  Back to the state of the buffer MP3 
  SoundBufferTime: uint 
  Voice streaming player in the seconds before the buffer 

  System (the System) 

  VmVersion: String [read-only] 
  ActionScript installation of the current version of Virtual Machine 
  TotalMemory: uint [read-only] 
  The current amount of memory. 
  Http://livedocs.macromedia.com/labs/1/flex/langref/flash/system/System.html 

  Debugging (debug) 

  GetClassByName (name: String): Class 
  Back to the designated name of the application of object 
  DescribeType (value: Object): XML 
  Xml target product actionscript parameters used to describe the method. 
  Ps: It seems that As3.0 did not imagine such a big change, but first FLASH8, then FLEX2, AS3.0, macroemdia pace is getting faster and faster. 

  Low-level - Abnormal 

  Exception Handling for FLASH developer, the road is still long, if a value in excess of the new int / unit data types, an error will be displayed. Some similar JAVA. You need to think of ways to solve these problems, otherwise FLASH procedures likely to collapse. if some of the things in the failure of AS1 and AS2, flash player may be very friendly overlooked in the FLASH8, you may have already read through the use of the file upload new capacity究wrong, it needs a series of incidents to demonstrate the process and the cache contained wrong. use AS3, which is working in a low-level state 

  Abnormalities may occur several places, such as: the use of As3.0, you need to check your recent memory usage, MemoryError is a new anomaly, when memory addressability failure, it will show through the Virtual Machine wrong AVM2 know . EOFError other abnormalities, illegalOperatinError, IOError, ScriptTimeoutError and StackOverflowError. 
  Think about these elements above, before many other languages such as JAVA dedicated, and you can see through the StringBuilder class, it can be from java StringBuffer class, we could easily allow the operation of characters. End of the period, I must say that the new AS3 The structure looks like a very good job. different backgrounds FLASH programmer will see it is that I know how to do, I think we can say that actionscript have passed, it passed childhood, youth dawn. 

  New order 

  There may be more new orders, there is a case of some of the found. 
  Sound (sound) 
  LeftPeak / rightPeak Property 
  Right-channel current amplitude of the voice, from 0-1 
  IsBuffering: Boolean [read-only] 
  Back to the state of the buffer MP3 
  SoundBufferTime: uint 
  Voice streaming player in the seconds before the buffer 
  System (the System) 
  VmVersion: String [read-only] 
  ActionScript installation of the current version of Virtual Machine 
  TotalMemory: uint [read-only] 
  The current amount of memory. 
  Http://livedocs.macromedia.com/labs/1/flex/langref/flash/system/System.html 
  Debugging (debug) 
  GetClassByName (name: String): Class 
  Back to the designated name of the application of object 
  DescribeType (value: Object): XML 
  Xml target product actionscript parameters used to describe the method. 
  Ps: It seems that As3.0 did not imagine such a big change, but first FLASH8, then FLEX2, AS3.0, macroemdia pace is getting faster and faster.