What is the relationship between as3 and as2 of flash? (Is it necessary to learn as2 after learning as3? )

First of all, as3 and as2 are two different languages.

The orange blowing in front said, "The high version must replace the low version." I just want to ask why Vista can't replace XP?

As3 is a pure OOP language, which is object-oriented and suitable for programmers.

As2 is compatible with OOP and POP, which is suitable for both programmers and the public.

As long as the public is still using flash, as2 will not be eliminated.

As3 is a compilation language, while as2 is an interpretation language.

It is often said here that as3 is twice as fast as as2, so as2 should be eliminated.

This statement is a follow-up statement.

The fact is that as3 is more than twice as fast as as2. Under the pressure test, as3 is 10 times faster and 13 times faster than as2.

But what's the use?

The same is true for animation.

Animation doesn't care about the difference between a millionth of a second and a millionth of a second.

Animation only takes a quarter of a second, because the human eye reflects the limit of a quarter of a second.

Another reason why as2 will not be eliminated is that as2 has been used for too long.

Leave too many valuable programs.

If you are eliminated,

FlashPlayer does not support as2 for one day.

That is to say, the day these programs fail.

All websites that apply flash will not allow it.

As2 will not be eliminated for the time being.

The plan will not be eliminated forever. For example, when as4 appeared, as3 was in jeopardy.

However, judging from the current situation, it is inevitable that as3 and as2 will coexist.

It is also proved that both flashPlayer 10 are supported.

Besides, the lone hero is wrong.

It means that he will not use as an external class.

As external class is recommended by adobe as writing method.