// SampleInstance.java

// from The Java Tutorial, article by Dale Green

// Shows how to construct an object at runtime and pass
// arguments to its constructor. Calls the Constructor.newInstance() method.


import java.lang.reflect.*;
import java.awt.*;

class SampleInstance {

   public static void main(String[] args) {

      Rectangle rectangle;
      Class rectangleDefinition;
      Class[] intArgsClass = new Class[] {int.class, int.class};
      Integer height = new Integer(12);
      Integer width = new Integer(34);
      Object[] intArgs = new Object[] {height, width};
      Constructor intArgsConstructor;

      try {
        rectangleDefinition = Class.forName("java.awt.Rectangle");
        intArgsConstructor = 
            rectangleDefinition.getConstructor(intArgsClass);
        rectangle = 
            (Rectangle) createObject(intArgsConstructor, intArgs);
      } catch (ClassNotFoundException e) {
          System.out.println(e);
      } catch (NoSuchMethodException e) {
          System.out.println(e);
      }
   }

   public static Object createObject(Constructor constructor, 
                                     Object[] arguments) {

      System.out.println ("Constructor: " + constructor.toString());
      Object object = null;

      try {
        object = constructor.newInstance(arguments);
        System.out.println ("Object: " + object.toString());
        return object;
      } catch (InstantiationException e) {
          System.out.println(e);
      } catch (IllegalAccessException e) {
          System.out.println(e);
      } catch (IllegalArgumentException e) {
          System.out.println(e);
      } catch (InvocationTargetException e) {
          System.out.println(e);
      }
      return object;
   }
}