Can I move a Java Program from V5R1 box to V4R5 box

I posted this on the java list without any success

So I am hoping somebody here has some experience in this
area and could answer my question.

 

Please understand I do not have much java experience

 

I have a Java Program that runs fine on our V5R1 box

I tried to move it to our V4R5 box and I get all kinds of
"java" errors when I execute it.

 

I noticed on my V5R1 box we used the following in the
classpath to compile the Java Program 

(and when we execute the java program)

 

/QIBM/ProdData/OS400/jt400/lib/jt400Native.jar

This does not exist on the V4R5 box

 

This does exist on the V4R5 box

/QIBM/ProdData/Java400/Jt400ntv.jar

 

I also looked at Installed Licensed programs

V4R5 has Jdk118

V5R1 has Jdk118, jdk12 jdk13

 

What is the easiest thing I can do to make this java program
work on both machines?

 

ANY HELP would be greatly appreciated

 

Allen