interface Cookie {
}

class FortuneCookie implements Cookie{
  public static Cookie newCookie(String str)
  {
    System.out.println("Fortunate " + str);
    return new FortuneCookie();
  }
}

class MisFortuneCookie implements Cookie{
  public static Cookie newCookie(String str)
  {
    System.out.println("UnFortunate " + str);
    return new MisFortuneCookie();
  }
}

Listing 2: CookieFactory.java
import java.lang.*;
import java.lang.reflect.*;

public class CookieFactory {

  // Instantiate a Cookie represented by the
  // input String parameter.
  public Cookie createCookie(String className)
  {
    // Get the class corresponding from String
    Class c = null;
    try {
       c = Class.forName(className);
    }
     catch (ClassNotFoundException cnfe) {
      cnfe.printStackTrace();
    }

    // Parameters for the "printCookie()" method
    // of the Cookie interface.
    Class pTypes[] = new Class[1];
    pTypes[0] = String.class;

    // Get "printCookie()" method for Cookie class
    Method method = null;
    try {
      method = c.getMethod("newCookie", pTypes);
    }
    catch (NoSuchMethodException nsme) {
      nsme.printStackTrace();
    }

    // Invoke "printCookie()" method to get Cookie
    Cookie cookie = null;
    try {
      Object[] params = new Object[1];
      params[0] = "Cookie";

      cookie = (Cookie)(method.invoke(c, params));
    }
    catch (InvocationTargetException ite) {
      ite.getTargetException().printStackTrace();
    }
    catch (IllegalAccessException iae) {
      iae.printStackTrace();
    }
    return cookie;
  }

  // Simple test for the Cookie Factory
  public static void main(String[] args)
  {
    CookieFactory cf = new CookieFactory();
    Cookie fc = cf.createCookie("FortuneCookie");
    Cookie mfc = cf.createCookie("MisFortuneCookie");
  }
}

Listing 3: XRayBean.java
import java.lang.reflect.*;
import java.beans.*;
import java.util.*;

public class XRayBean {

  public Method[]
    getMethodsFromBean(BeanInfo bi) {

    Method[]           mList;
    MethodDescriptor[] mDescriptorList;

    mDescriptorList = bi.getMethodDescriptors();
    mList = new Method[mDescriptorList.length];

    for (int i = 0; i < mDescriptorList.length; i++) {
      mList[i] = mDescriptorList[i].getMethod();
    }
    return mList;
  }

  public PropertyDescriptor[]
    getPropsFromBean(BeanInfo bi) {

    PropertyDescriptor[] pDescriptorList;

    pDescriptorList =
         bi.getPropertyDescriptors();
    return pDescriptorList;
  }

  public EventSetDescriptor[]
    getEventsFromBean(BeanInfo bi) {

    EventSetDescriptor[] eDescriptorList;

    eDescriptorList =
        bi.getEventSetDescriptors();
    return eDescriptorList;
  }

  public Method[]
    getListenerMethods(EventSetDescriptor esd) {

    Method mList[];

    mList = esd.getListenerMethods();
    return mList;
  }

  public static void main(String[] args) {
    XRayBean xray = new XRayBean();

    if (args.length != 2) {
      System.out.println("Usage: java XRayClass " +
       "<className> [methods | properties | events]");
      System.exit(1);
    }

    try {
      Class c     = Class.forName(args[0]);
      BeanInfo bi = Introspector.getBeanInfo(c);

      if (args[1].equals("methods")) {
        Method[] mList = xray.getMethodsFromBean(bi);

        for (int i = 0; i < mList.length; i++) {
       System.out.println("Method[" + i +
                          "]: " + mList[i]);
        }
      }
      else if (args[1].equals("properties")) {
     PropertyDescriptor[] pList =
           xray.getPropsFromBean(bi);

        for (int i = 0; i < pList.length; i++) {
          System.out.println(
           "---------------------------------");
          System.out.println("Property Name: " +
                             pList[i].getName());
       System.out.println("Read  Method[" +
            i + "]: " + pList[i].getReadMethod());
       System.out.println("Write Method[" +
         i + "]: " + pList[i].getWriteMethod());
     }
      }
      else if (args[1].equals("events")) {
     EventSetDescriptor[] eList =
                xray.getEventsFromBean(bi);

        for (int i = 0; i < eList.length; i++) {
          System.out.println(
            "--------------------------------");
          System.out.println("Event Name: " +
                            eList[i].getName());

       Method mList[] =
         xray.getListenerMethods(eList[i]);

          for (int j = 0; j < mList.length; j++) {
         System.out.println("Listener Method[" +
                       j + "]: " + mList[j]);
          }
     }
      }
      else {
        System.out.println("ERROR:" +
         "The selected feature is not implemented");
      }
    }
    catch (java.lang.ClassNotFoundException e) {
      e.printStackTrace();
    }
    catch (java.beans.IntrospectionException e) {
      e.printStackTrace();
    }
  }
}

Listing 4: XRayClass.java
import java.lang.reflect.*;
import java.util.*;

public class XRayClass {

  public Method[]
    getLocalMethodsFromClass(Class c) {

    Method[] mList;

    mList = c.getDeclaredMethods();
    return mList;
  }

  public Method[]
    getAllMethodsFromClass(Class c) {

    Method[] mList;

    mList = c.getMethods();
    return mList;
  }

  public Constructor[]
    getAllConstructorsFromClass(Class c) {

    Constructor[] cList;

    cList = c.getDeclaredConstructors();
    return cList;
  }

  public Field[] getFieldsFromClass(Class c) {
    Field[] fList;

    fList = c.getDeclaredFields();
    return fList;
  }

  public Class[] getClassesFromClass(Class c) {
    Vector cList = new Vector();
    Class  cTemp;
    Class[] aList;

    cTemp = c;
    while ((cTemp =
            cTemp.getSuperclass()) != null) {
      cList.addElement(cTemp);
    }

    aList = new Class[cList.size()];
    for (int i = 0; i < cList.size(); i++) {
      aList[i] = (Class) cList.elementAt(i);
    }
    return aList;
  }

  public Class[]
    getInterfacesFromClass(Class c) {

    Class[] cList;

    cList = c.getInterfaces();
    return cList;
  }

  public static void main(String[] args) {

    XRayClass xray = new XRayClass();

    if (args.length != 2) {
      System.out.println("Usage: " +
        "java XRayClass <className>" +
        "[localMethods | allMethods | " +
        "Constructors | fields | inheritance |" +
        "interfaces] ");
      System.exit(1);
    }

    try {
      Class c = Class.forName(args[0]);

      if (args[1].equals("localMethods")) {
        Method[] mList =
          xray.getLocalMethodsFromClass(c);

        for (int i = 0; i < mList.length; i++) {
       System.out.println("Method[" + i +
                         "]: " + mList[i]);
     }
      }
      else if (args[1].equals("allMethods")) {
     Method[] mList =
       xray.getAllMethodsFromClass(c);

        for (int i = 0; i < mList.length; i++) {
       System.out.println("Method[" + i +
                        "]: " + mList[i]);
     }
      }
      else if (args[1].equals("Constructors")) {
     Constructor[] cList =
       xray.getAllConstructorsFromClass(c);

        for (int i = 0; i < cList.length; i++) {
       System.out.println("Constructor[" + i + "]: " + cList[i]);
     }
      }
      else if (args[1].equals("fields")) {
        Field[] fList =
          xray.getFieldsFromClass(c);

        for (int i = 0; i < fList.length; i++) {
       System.out.println("Field[" + i +
                          "]: " + fList[i]);
     }
      }
      else if (args[1].equals("inheritance")) {
        Class[] cList =
          xray.getClassesFromClass(c);

        for (int i = 0; i < cList.length; i++) {
       System.out.println("Class[" + i +
                          "]: " + cList[i]);
     }
      }
      else if (args[1].equals("interfaces")) {
        Class[] cList =
          xray.getInterfacesFromClass(c);

        for (int i = 0; i < cList.length; i++) {
          System.out.println("Interface[" + i +
                             "]: " + cList[i]);
     }
      }
      else {
     System.out.println("ERROR:" +
       "The selected feature is not implemented");
      }
    }
    catch (java.lang.ClassNotFoundException e) {
      e.printStackTrace();
    }