Java Call main() method of a class using another class in java

public static void main(String[] args) throws ClassNotFoundException, SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException {
 
 Class<?> cls = Class.forName("pkg1.pkg2.classname");
   
Method meth = cls.getMethod("main", String[].class);
 
 String[] params = null; // init params accordingly
 
  meth.invoke(null, (Object) params); // static method doesn't have an instance
}