Re: Protected methods in Object class

From:

ankur <ankur.a.agarwal@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Thu, 22 Nov 2007 12:19:19 -0800 (PST)

Message-ID:

<1066a9ee-2404-4103-ace0-588b8bee74a3@s6g2000prc.googlegroups.com>

On Nov 22, 11:44 am, Daniel Pitts
<newsgroup.spamfil...@virtualinfinity.net> wrote:

ankur wrote:

So I am a Java newbie and have a simple question here:

protected methods of a superclass are inheritable by the subclass. So
how come the protected methods of Object class namely clone and
finalize not inherited by every class by default ie why is overriding
for these methods necessary in the class which wants to use these
methods and not accessed directly.

Thanks,
Ankur

All non-private member methods are inherited. Protected simply means
that you have to be at or below the class that declares it to access it.

The only thing that overriding does for it is to create a public method
with the same signature that delegates to the protected method.

--
Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>

I am still not able to understand the issue with these class
declarations:

I have following classes declared in the same package:

public class Sample implements Cloneable {
    private int j;

    public Sample(int h)
    {
        j = h;
    }
    public void display()
    {
        System.out.printf("The value of private variable is %d\n", j);
    }
}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~

public class TestSample{

    /**
     * @param args
     */
    public static void main(String[] args) {
        Sample obj = new Sample(78);
        obj.clone();

    }

}

I am not able to understand why can't obj refer to clone() method.
Afterall obj is of type Sample which extends Object class by default.