Dentro del proyecto de Eclipse para Android, ¿cómo ejecutar clases Java con main (String [] args) como aplicación Java?

public class JavaApp {
    public static void main(String[] args) {
        // some dummy operations here, possibly including 
        // System.out.print(string);
    }
}

Me da error

Invalid layout of java.lang.String at value
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (javaClasses.cpp:129), pid=6748, tid=6676
#  fatal error: Invalid layout of preloaded class
#
# JRE version: 7.0_11-b21
# Java VM: Java HotSpot(TM) 64-Bit Server VM (23.6-b04 mixed mode windows-amd64 compressed oops)
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# D:\Workspaces\ADT-Bundle\FMonPianoApp\hs_err_pid6748.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.sun.com/bugreport/crash.jsp
#

yo suelomain() para pruebas pequeñas (sin JUnit)