Easiest way to convert sikuli code to java?

No, not yet available.

--- blueprint:

the suggested approach has not been tested until now.

So be the first ;-)

I tried to do this, but got following error.

java -cp sikuli-script.jar org.python.util.jython test.sikuli\test.py
Traceback (most recent call last):
  File "test.sikuli\test.py", line 81, in <module>
    if exists("test1.png",180):
NameError: name 'exists' is not defined

all the class path and .py file path are correct.

Any suggestions why it does not recognize exists?

you need an
from sikuli.Sikuli import *

in the first lien of your script, in all cases when you use a Jython interpreter to run the contained .py directly.

furthermore your script does not know where your images live in this case. You have to set the image path yourself.

What is your intention doing this? There are only disadvantages against the run as
java -jar sikuli-script.jar test.sikuli

The version you are trying makes only sense, if you need to do some things, before Sikuli is initialized.

actually i want it to be a java program so i need not to install sikuli on each pc i want to use my program.

where should i define the images path?

java -cp sikuli-script.jar org.python.util.jython test.sikuli\test.py
[info] Sikuli vision engine loaded.
[info] Windows utilities loaded.
[info] VDictProxy loaded.
[info] Text Recognizer inited.

i got this results and prompt back, but can not find any class in the test.sikuli folder, any idea?

-- 1. want it to be a java program so i need not to install sikuli on each pc
that is not possible currently. You need at least sikuli-script.jar and the libs directory with it's content on each machine together with the correct system path settings.

--2. can not find any class in the test.sikuli folder
I just tried on Windows: you are right. So forget this solution. I will purge it from the docs.

Have a look at the Java class ScriptRunner (http://sikuli.org/doc/java-x/org/sikuli/script/ScriptRunner.html), which is internally used to run the scripts. I know, that some people are using this approach, to wrap running Sikuli scripts into there Java code. You might have to look into the Sikuli sources to find out, how it works.

any update of this in new version which will be released on 15th sept?

no