Class c = Class.forName("maClasse");
while((c=c.getSuperclass()) != null)
{
   System.out.println(c.getName());
}

Class c = Class.forName("maClasse");
Class[] interfaces = c.getInterfaces();
for(int i=0;i<interfaces.length:++i)
{
   System.out.println(interfaces[i].getName());
}

Class c = Class.forName("monPackage.maClasse");
Package p = c.getPackage();
System.out.println(p.getName());

Class c = Class.forName("maClasse");
java.lang.reflect.Method[] m = c.getMethods();

getMethod(String name, Class[] parameterTypes)

// m est un objet de type Method
Class r = m.getReturnType();
Class[] params = m.getParameterTypes();

Class c = Class.forName("maClasse");
java.lang.reflect.Field[] f = c.getFields();

// m est un objet de type Method
int mod = m.getModifiers();
if(java.lang.reflect.Modifier.isStatic(mod))
{
   System.out.println("méthode statique");
}

// f est un objet de type Field
int mod = f.getModifiers();
System.out.println(java.lang.reflect.Modifier.toString(mod));

void changeValeur(Object obj, String nomChamp, Object val) throws Exception
{
  java.lang.reflect.Field f = obj.getClass().getField(nomChamp);
   f.set(obj,val);
}

void afficheValeur(Object obj, String nomChamp) throws Exception
{
   Field f = obj.getClass().getField(nomChamp);
   System.out.println(f.get(obj));
}

Object invoke(Object obj, Object[] args)

Object lancerMethode(Object obj, Object[] args, String nomMethode) throws Exception
{
   Class[] paramTypes = null;
   if(args != null)
   {
      paramTypes = new Class[args.length];
      for(int i=0;i<args.length;++i)
      {
         paramTypes[i] = args[i].getClass();
      }
   }
   Method m = obj.getClass().getMethod(nomMethode,paramTypes);
   return m.invoke(obj,args);
}

  Class types[] = { Integer.TYPE }; 
  Method method = Math.class.getMethod("abs", types); 
  Object parametres[] = { new Integer(-1) }; 
  Integer iWrap = (Integer) method.invoke(null, parametres); 
  System.out.println("Valeur absolue de -1 = " + iWrap);

Object invoke(Object obj, Object[] args)

void modifierChamp(Secret s, String val)
{
   Field f = s.getClass().getDeclaredField("priv");
   f.setAccessible(true);
   f.set(s,val);
}

Class c = Class.forName("maClasse");
java.lang.reflect.Field[] f = c.getDeclaredFields();