Java Clone (replication of classes) instance code

I implemented it myself:

Copy codeThe Code is as follows: public class A implements Cloneable {
Public String str [];

A (){
Str = new String [2];
}

Public Object clone (){
A o = null;
Try {
O = (A) super. clone ();
} Catch (CloneNotSupportedException e ){
E. printStackTrace ();
}
O. str = new String [2];
Return o;
}
}

Void run () throws Exception {
A a1 = new A (), a2 = new ();
A1.str [0] = "a"; a1.str [1] = "B ";
A2 = (A) a1.clone ();
A2.str [0] = "c"; a2.str [1] = "d ";
System. out. println (a1.str [0] + "" + a2.str [0]);
}

Result:

A c

1.

Copy codeThe Code is as follows: public class A implements Cloneable {
Public String name;

Public Object clone (){
A o = null;
Try {
O = (A) super. clone ();
} Catch (CloneNotSupportedException e ){
E. printStackTrace ();
}
Return o;
}
}

2.

Copy codeThe Code is as follows: public class A implements Cloneable {
Public String name [];

Public (){
Name = new String [2];
}

Public Object clone (){
A o = null;
Try {
O = (A) super. clone ();
} Catch (CloneNotSupportedException e ){
E. printStackTrace ();
}
Return o;
}
}

3.

Copy codeThe Code is as follows: public class A implements Cloneable {
Public String name [];
Public Vector <B> claB;

Public (){
Name = new String [2];
ClaB = new Vector <B> ();
}

Public Object clone (){
A o = null;
Try {
O = (A) super. clone ();
} Catch (CloneNotSupportedException e ){
E. printStackTrace ();
}
O. name = new String [2]; // deep clone
O. claB = new Vector <B> (); // run the clone command to the end.
For (int I = 0; I <claB. size (); I ++ ){
B temp = (B) claB. get (I). clone (); // Of course, Class B also needs to implement the corresponding clone method
O. claB. add (temp );
}
Return o;
}
}