Three ways to instantiate a Java class

The following program was written a while ago
to demonstrate object creation process in java

////////////////////////////////
// Simple.java
//
// A Java program to demonstrate hw to 
// instantiate an Object using 
//   A) on heap using new 
//   B) Java Beans framework
//   C) Reflection
//
//
//  usage:-
//     Javac Simple.java
//     java  Simple
//
//
//


import java.lang.*;
import java.lang.*;
import java.beans.*;
import java.io.*;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import static java.lang.System.out;


//////////////////////////////
//
// A Simple Java Bean ( class )
//
//

public class Simple
{
  ///////////////////////
  //
  // An Instance variable...
  private String message;

  /////////////////////////////////
  //
  //  CTOR
  //
  
  public Simple(   ){
  
    message = null;
  }

  /////////////////////////
  // Java uses patterns to simulate properties...!
  //
  public String getmessage() { return message; }
  public void   setmessage(String pmessage) {
    message = pmessage;
  }

  //////////////////////////////////
  // A test driver...
  //

  public static void main( String [] args ) throws IOException,
                                            ClassNotFoundException,
                                            InstantiationException,
                                            Exception 
  {

   ///////////////////////////////////
   //
   // Instantiate using new 
   //
   //

   Simple sm = new Simple();
   sm.setmessage("Hello world...");
   System.out.println(sm.getmessage());

   //////////////////////////////////////////////
   // Instantiate using Java Beans
   //
   //

   Simple sm2 = (Simple)Beans.instantiate(
   Simple.class.getClass().getClassLoader(),"Simple");
   if ( sm2 == null ) {
      System.out.println("Failed to load the class....");
      return;
   }
   sm2.setmessage("Hello world...");
   System.out.println(sm2.getmessage());

   /////////////////////////////////////////////////////
   //
   //
   //
   Class c = (Class)Class.forName("Simple");
   if ( c == null ) {
      System.out.println("Failed to load the class....");
      return;
   }

   Constructor[] ctors = c.getDeclaredConstructors();
   Constructor ctor = null;
   for (int i = 0; i < ctors.length; i++) {
          ctor = ctors[i];
         if (ctor.getParameterTypes().length == 0)
          break;
   }

   Simple sm3 = (Simple)ctor.newInstance();
    
   sm3.setmessage("Hello world...");
   System.out.println(sm3.getmessage());


  }  

        

}

The console output is shown below

D:\Instantiation>javac Simple.java

D:\Instantiation>java Simple
Hello world...
Hello world...
Hello world...

D:\Instantiation>