Java.lang.VerifyError (Eclipse vs Command Line)

Question

Dear all,
I'm a very new user of the java programming language. I'm experimenting with using Eclipse and Java commands built in to our University network. I've come up against a problem that I cannot resolve...
In Eclipse (on Windows), i've written a class which takes routines from some External JARs and produces some outputs. It works, great!
Now I want to run it from the command line (SuSe Linux)...
I've defined my CLASSPATH to include (explicitly) each of the .jar files that are required. Then, i compile my .java file:
javac SobolGenerator.java
BUT i get the following error:
Exception in thread "main" java.lang.VerifyError: (class: Statistics/Random, method: <clinit> signature: ()V) Incompatible argument to function
at QuasiRandom.Sobol.<init>(Sobol.java:436)
at SobolGenerator.generateNew(SobolGenerator.java:43)
at SobolGenerator.main(SobolGenerator.java:151)
I don't think it's anything I've written myself (but probably is), since it refers to an error in the Statistics/Random method...
QuasiRandom.Sobol issues the following command:
double u=Random.U1();
======================================
package Statistics;
import cern.jet.random.*;
import cern.jet.random.engine.MersenneTwister;
public class Random{
static double Y=0; //second normal deviate from Box-Muller
static boolean New=true; //flag indicating wether a new normal deviate
// has to be computed (otherwise Y is reported)
/** <p>First MersenneTwister uniform random number generator.</p>
public static final Uniform
uniform_1=new Uniform(new MersenneTwister(113));
/** <p>Second MersenneTwister uniform random number generator.</p>
public static final Uniform
uniform_2=new Uniform(new MersenneTwister(2113));
/** <p>First uniform u\in(0,1).</p>
public static double U1(){ return uniform_1.nextDouble(); }
/** <p>Second uniform u\in(0,1).</p>
public static double U2(){ return uniform_2.nextDouble(); }
/** Fair draw from {1,-1}.
public static int Sign()
double x=U1(); return (x>0.5)? 1:-1;
/** <p>Loaded draw X from {-1,1}.
* X=1 with probability p,
* X=-1 with probability 1-p.</p>
* @param p Probability that X=+1.
public static int Sign(double p)
double x=U1(); return (x<p)? 1:-1;
/**<p>Standard normal deviate using the inverse normal CDF on uniform
* deviates generated by the Mersenne Twister.</p>
public static double STN()
return FinMath.N_Inverse(uniform_1.nextDouble());
} //end STN()
} // end Random
==========================================
As i say, Eclipse does the whole thing fine but the command line approach doesn't work.
So if anyone can help I will be extremely grateful.
Best regards,
Neil

Answer 1

Welcome to the club !
Eclipse performs a lazy evaluation of items in its workspce and in commandline mode, you cannot guarantee that your class has been loaded by the time you attempt to use it. This is a real pain. No one will answer your questions because in reality, this software has no support. Commandline execution has long be requsted and many articles have been written. Very few work. If you learn something, maybe you can tell the rest of us dummies....
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