Cloneable Error!

[NatProg]

Could someone tell me why I keep getting the exception error in Clone() method?
You are Awesome!

public class Person
{
    private String name;
    private Date born;
    private Date died;//null indicates still alive.

    public Person(){
    	name = null;
    	born = new Date();
    	died = new Date();
    }
    public Person(String initialName, Date birthDate, Date deathDate)
    {
        if (consistent(birthDate, deathDate))
        {
            name = initialName;
            born = new Date(birthDate);
            if (deathDate == null)
                died = null;
            else
                died = new Date(deathDate);
         }
         else
         {
             System.out.println("Inconsistent dates. Aborting.");
             System.exit(0);
         }
    }
.
.
.
    public Object Clone()
    {
    	try
    	{
    		Person copy;
    		copy = (Person)super.clone();
    		copy.name = (String)super.clone();
    		copy.born = (Date)super.clone();
    		copy.died = (Date)super.clone();
    		return copy;
    	}catch(CloneNotSupportedException e){
    		System.err.print("Error on Cloning!");
    		e.printStackTrace();
    		return null;
    	}
    }
}

public class PersonDemo
{
    public static void main(String[] args)
    {
    	Date date = new Date();
        Person bach = 
            new Person("Johann Sebastian Bach",
                 new Date("March", 21, 1685), new Date("July", 28, 1750));
        Person stravinsky = 
            new Person("Igor Stravinsky",
                 new Date("June", 17, 1882), new Date("April", 6, 1971));
        Person adams = 
            new Person("John Adams",
                 new Date("February", 15, 1947), null);

        System.out.println("A Short List of Composers:");
        System.out.println(bach);
        System.out.println(stravinsky);
        System.out.println(adams);

        Person bachTwin = (Person)bach.Clone();//cloning
        System.out.println("Comparing bach and bachTwin:");
        if (bachTwin == bach)
             System.out.println("Same reference for both.");
        else
             System.out.println("Distinct copies.");
        if (bachTwin.equals(bach))
             System.out.println("Same data.");
        else
             System.out.println("Not same data.");
     }
}

[Norm]

Please post the full text of the error message.

[JosAH]

Clone() != clone() (Java is case sensitive). Also read the API on cloning() (your class also needs to implement a marker interface).

kind regards,

Jos

[NatProg]

Please post the full text of the error message.

Here it is:

Error on Cloning!java.lang.CloneNotSupportedException: Person
at java.lang.Object.clone(Native Method)
at Person.Clone(Person.java:225)
at PersonDemo.main(PersonDemo.java:22)
Exception in thread "main" java.lang.NullPointerException
at PersonDemo.main(PersonDemo.java:28)

[NatProg]

Clone() != clone() (Java is case sensitive). Also read the API on cloning() (your class also needs to implement a marker interface).

kind regards,

Jos

I changed the
public Object Clone()
to
public Object clone()
And also in the main method. But I still keep getting the same CloneNotSupportedException !

[Norm]

at Person.Clone(Person.java:225)

Which line is 225?

Have you read the API doc for the Object class's clone() method?
It explains when and why the exception is thrown.

[JosAH]

I changed the
public Object Clone()
to
public Object clone()
And also in the main method. But I still keep getting the same CloneNotSupportedException !

Read what I wrote between parentheses.

kind regards,

Jos

[NatProg]

Which line is 225?

Have you read the API doc for the Object class's clone() method?
It explains when and why the exception is thrown.

Thanks you so much Norm!
I read the doc and I realized I haven't added the implemens Cloneable to Person class.

[Norm]

When in doubt, read the manual.