Java HotSpot Virtual Machine

Hi,

I wrote the program to create JVM from C++, passing a string to java program to java and tried to get /set the field. I I have the problems in accessing the fields

here is the java and c++ codes

public class ApiTest {

private int i = 1;
private String txt = " ";
private init ( String str) {
i = 2;
txt = str;
}

public static void main(String[] args) {
ApiTest api = new ApiTest ( ) ;
api.init ( args [0]);
System.out.println( args[0]);
System.out. println ( "i =" + i);
System.out.println ( "txt = " + txt);
}
}


C++ codes like this

1. create JVM
2. find class
jcls = (*env)->findCalss (env, " ApiTest")
3. call class method ID
4. invoke the method with args string , it was converted to jstring
5. getFieldID of Int and String
6. getIntField
7, set new value back to Int field
8. get string field


up to step 5 , it looks work okay it can pass the string as args [0] to java
invoke the init (), but problems are
1. I can get the int and print out but value is not 1
2, after I set the new value then I get it again, it the same value , nothing changed
3. I can't get jstring in string field , it shows that can't get jstring at all
jstring jst = (*env)->getObjectField (env, jcls, jfid2)
then jstring==0

what is the problem? I mess up about jclass and jobject I think, but I don't know how to get class object after invoke the main method.

thank you for any help