Not hating on Java, but this is awesome!


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SuperNova2150

Posted on 01-04-13 12:39 AM

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https://github.com/natural/java2python

I love the fact that it can convert almost all Java code into Python. I wonder if Whitehole could be eventually converted to Python this way. (not requesting anything NOW, but essentially "putting it on the table".)

Arisotura

Posted on 01-04-13 12:41 AM

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No.

Python is likely slower than Java. Also, you can't just take Whitehole's code an convert it to Python with that and expect it to work. You'd have to rewrite all the GUI code because there's no Python equivalent to Java's Swing.

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MK7tester

Posted on 01-04-13 01:06 AM

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Not a programmer myself, but i've heard few rumors Python beats Java. Not sure if true.

Arisotura

Posted on 01-04-13 01:08 AM (rev. 2 of 01-04-13 01:09 AM)

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If you go by rumors, it is also said that Java is faster than C.

Which would mean Python is faster than C. Which is wrong. Reggie! has an external C(++) library for handling certain tasks, it's there for a reason.

Anyway, if you guys don't know, Whitehole already went through a recoding phase, from C# to Java. It's painful and I don't feel like doing it again.

And as I said in my previous post, you can't just take Java code and automagically turn it into Python code. The languages have different APIs, requiring several code changes to get the final code working.

In short, no.

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xfix

Posted on 01-04-13 06:51 PM (rev. 3 of 01-04-13 06:53 PM)

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Last view: 3663 days ago First of all, mechanical translations are bad. Second, there is just no reason to port it to Python. None. It works rather well and fast already (ok, I haven't tested). Now as for java2python utility you provided. I have put something more complex than "Hello, world!" and well...
[source=java]public class HelloWorld {
public static void main(String[] args) {
System.out.printf("Hello, %s!\n", "world");
}
}[/source]
Simple enough? Yes. This is my translation (without that utility).
[source=python]print "Hello, %s!\n" % "world",[/source]
Readable, I know. But this tool doesn't do that.
[source=python]#!/usr/bin/env python
""" generated source for module HelloWorld """
class HelloWorld(object):
""" generated source for class HelloWorld """
@classmethod
def main(cls, args):
""" generated source for method main """
System.out.printf("Hello, %s!\n", "world")

if __name__ == '__main__':
import sys
HelloWorld.main(sys.argv)[/source]
What about... no? It doesn't even translate things correctly (System definitely isn't identifier in Python). The only translator I actually have seen working well is sed to Perl (included with Perl as s2p), but it generates lots of code for edge cases. Oh, and C# <=> VB.NET, but those are similar languages (they just have different syntax).

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