Copying objects

[Graeme English <graeme.english@xxxxxxxxx>]

 

I have never had to tackle the referencing problem until now.  I am trying to modify a vector object that I get from a GUI pane that has multiple columns and rows for data entry.  When I manipulate the my copy of the vector it modifies the panes vector as well.  I have found a different way to do it and avoid the whole clone thing but I am still curious on why it wasn't working.

 

Here is my code:

1    Vector vector = (Vector) getTableModel().getDataVector().clone();

2    ... some modifications to vector ....

3    System.out.println(vector);

4    System.out.println(getTableModel().getDataVector());

 

Both 3 and 4 gave the same output.

It was the same result as if I did it like this: 

1    Vector vector = getTableModel().getDataVector();

2    ... some modifications to vector ....

3    System.out.println(vector);

4    System.out.println(getTableModel().getDataVector());

 

Is there something special about vectors or do I just have the concepts mixed up?

 

Thanks in advance,

Graeme.