IllegalArgumentException when using Introspector to get bean info

Question

hi all
i have a bean class that has two strings and one vector. when i use introspector to read and write bean value to a new object of same type, i got an IllegalArgumentException :
Exception in thread "main" java.lang.IllegalArgumentException: argument type mis
match
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at IntrospectTest.copy(IntrospectTest.java:61)it happens when it tried to access the vector which contains two string values. here is my method
     public static Object copy(Object o)
          System.out.println("in copy...");
          Object newObject = null;
          System.out.println("object : "+o);
          try
               Class c = o.getClass();
               System.out.println("Class from o : "+c);
               newObject = c.newInstance();
               System.out.println("newObject : "+newObject);
               PropertyDescriptor p[] = null;
               p = Introspector.getBeanInfo(o.getClass()).getPropertyDescriptors();          
               Object[] args = new Object[1];
               System.out.println("p has "+p.length+" elements");
               for (int i = 0; i < p.length; i++)
                    String name = p.getName();
                    System.out.println("name : "+name);
                    if(!"class".equals(name))
                         Object value = p[i].getReadMethod().invoke(o, new Object[0]);
                         System.out.println("value : "+value);
                         args[0] = name;
                         p[i].getWriteMethod().invoke(newObject, args);
          }catch (IntrospectionException ie)
               System.out.println("IntrospectionException : "+ie.getMessage());
          }catch (InvocationTargetException ite)                     
               System.out.println("InvocationTargetException : "+ite.getMessage());
          }catch (IllegalAccessException ile)
               System.out.println("IllegalAccessException : "+ile.getMessage());
          }catch(InstantiationException ine)
               System.out.println("InstantiationException : "+ine.getMessage());
          return newObject;
does anyone know how i can read and write vector object in a bean? thanks.

Answer 1

Normally I would be happy to help you, but after several years of trying to help here, I've decided not to contribute anymore because of the piss-poor way in which this site is being administered.
Others are still helping, but more may leave if things don't improve. May I recommend devshed or javaranch?
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http://www.javaranch.com/
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The forum denizen formerly known as jverd