no such method error

my rpg code is bombing when it calls a java method. Why is the method not
found?

Cause . . . . . : RPG procedure DSHJAVA2 in program WLKLIB/DSHJAVA2
received
Java exception "java.lang.NoSuchMethodError: GetSpeed" when calling
method
"GetSpeed" with signature "()Ljava.lang.String;" in class
"HelloWorld".

I have the javap output below. It shows a method GetSpeed() with
a signature: ()Ljava/lang/String;

I am successfully creating the object. The code bombs on the GetSpeed call.

helloW = helloWorld_New( 5: 45: 3 ) ;
string = helloWorld_GetSpeed( helloW ) ;


** --------------------- helloWorld_New ----------------------
d helloWorld_New...
d pr o extproc(*java:
d 'HelloWorld':
d *CONSTRUCTOR)
d InCadence 10i 0 value
d InSpeed 10i 0 value
d InGear 10i 0 value


** --------------------- helloWorld_GetSpeed -----------------
d helloWorld_GetSpeed...
d pr o class(*java:'java.lang.String')
d extproc(*java:'HelloWorld':
d 'GetSpeed')

d string s o class(*java:'java.lang.String')
d hellow s o class(*JAVA:
d 'HelloWorld')


QSH CMD('javap -s HelloWorld')

Compiled from "helloworld.java"
class HelloWorld extends java.lang.Object{
public HelloWorld(int,int,int);
Signature: (III)V
public java.lang.String GetSpeed();
Signature: ()Ljava/lang/String;
public static void main(java.lang.String[]);
Signature: ([Ljava/lang/String;)V
}