If I understand you you wish to make updates to the tables data and these be
reflected in the JTable automatically.
To achieve this painlessly a good approach is to create a class that extends
AbstractTableModel and use this to create your JTable in JTables
constructor.  All model updates will then fire JTables internal listener and
make the updates automatic.

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Mike W

Try writing your own custom TableModel.
Then you could write a method called setValues(Matrix m1, Matrix m2)
which sets the matrices for you.

To detect changes to the model and update the JTable, use a
TableModelListener.

http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#data

HTH, andreas

Thank you all very much - it helped.
Big Thx