Cloning multidimension arrays

[Shivani Chandna]

Cloning multidimension arrays results in shallow cloning. Have understood that from below exampls.
Can someone explain using diagram - (like Corey explained the GC concepts on this site...) as to how the shallow copying is working

       
                Integer []I2 = { new Integer(3) };
Integer I3[] = (Integer[])I2.clone();
System.out.print((I2 == I3) + " ");
I2[0] = new Integer(79);
            System.out.println("I2:" + I2[0]);
System.out.println("I3:" + I3[0]);
 
Integer [][]I22 = { {new Integer(3)},
                    {new Integer(38)} };
Integer I33[][] = (Integer[][])I22.clone();
System.out.print((I22 == I33) + " ");
I22[0][0] = new Integer(79);
            System.out.println("I22:" + I22[0][0]);
System.out.println("I33:" + I33[0][0]);

Produces the following output:
false I2:79
I3:3
false I22:79
I33:79


Thanks a lot !

[Michael Ernest]

I don't understand your example. You clone() I2, then test for equality of reference between I2 and I3, which is going to be false. Then you change the value of I2[0] and print it. Then you print out I3[0].

What are you trying to demonstrate?

[naraharirao mocherla]

Hi Shivani
can you please give me Corey's link you mentioned(regarding GC diagrams).
Thanks in advance.

1.Is clone method() included in SCJP 1.4 ?

[Shivani Chandna]

yes i suppose so that the method is included
Here is Corey's Site

-- Shivani