Scratch

Hi guys
I have heard of a way which you can get scratch programs in a java format. The only problem is that you need to know a bit of java language. You can download a program called "jGRASP" for free. It doesn't actually convert it but i think there is PDF files with scratch script images which you can download form somewhere.The java scripts are beside the scratch scripts so it shouldn't be too difficult.

I dont actually think there is a program which directly converts scratch to java.

The answer to this question is quite simple.

Open the project up in Scratch, then upload it. Find it online, and scroll down to find the 'add this' bit. Above the 'add this' button, it says 'embed'. Click that, then copy and paste the applet code into a website. Voilà! You have Java Scratch.

TornFusion wrote:

Even though you might rename it into a java, the code is incorrect. Java can't understand squeak!

SB-files aren't squeak!

I have programmed a program, wich converts Scratch-Projects to Java!
Topic: http://scratch.mit.edu/forums/viewtopic.php?id=62402
Download: http://www.file-upload.net/download-350 … R.Jar.html
Sorry it's all in german...

whuszah wrote:

i really wanted to do this so i could compare the languages and learn java, because i feel comfortable with scratch, and i wanted to transition.

The two are rather different.  Graphics are integrated nicely into everything Scratch, and Scratch runs in real time.  Java is an old fashioned monster called a console app.  You write your program like a letter in a word processor.  Then you run it through the compiler and see how many errors the compiler throws in your face.  Repeat until the compiler says nothing.  That is called a clean compile and as best the compiler knows, your legal code should run.  Then you tell your program to run while crossing your fingers to make sure that there was not an error that the compiler could not imagine or that you did not string statements together in a way that may be legal, but does not do what you wanted it to. 

Java is a fine language and will do many things Scratch may not be suited to and is well worth learning and is an employable skill.  To learn Java, go to the Java tutorial "trails" maintained by Oracle, the owner of Java.  The tutorials are as good as you will find for any computer language, but this will be a complete break from what you have become accustomed to here.

When you undertake a project, pick a language that is appropriate.  If you need a heavy duty GUI to sit in front of a bunch of ugly data which you then beautify, Java will do fine.  If you need a graphic heavy environment to run simple graphics or games, I'd call Scratch by far superior until you feel the need to make it massively multiplayer online. 

Have fun programming.  I used to be convinced that by now everyone would program and it would just be a part of normal literacy, but it is becoming increasingly clear that programmers are a special breed.

Pawnfork wrote:

BTW, if anyone writes the Scratch to Java cross compiler, or one in the other direction, I have the greatest admiration for your ability, time and raw determination.

There are big problems with the structure of a Scratch project and a Java program.
1. In Java you wouldn't use for every Sprite some Threads:
You make one Thread which draws all Images, lines, round rects... etc. at once!
2. The commands in Scratch (like [go ... steps], [touching...] and [bounce off edge]) are very much work in Java. (You normally don't use things like this because there are faster
and better ways...)
3. There are speed problems.
The Java program would be run much to fast and you would have to use
much "sleeps"... That's not really cool.

tamas_szerb wrote:

kattintáskor gf 
repeat until <(timer) > [10]>
  go to [mouse-pointer v]
end
think [Scripts in your posts!] for (3) secs

Okay... 1. This topic hasn't been posted on in over 5 months. 2. That was COMPLETELY irrelevant. 3. There is already a topic to test scratchblocks.

Proanimation is exactly right.
I can program in java myself and know that changing the extension will do the same as
type random words into a .java  and compiling it and expecting a program to come out.
The way to do this would be to create a  compiler that understands the sb code
and converts it to java commands then compiles the resulting program as a java class
or more simply find a scratch to exe converter which would basicaly make a standalone executable and would run fast but would only run on windows unless you had an emulator.