get value from textfield and set on selected jtable row.


  DefaultTableModel tm=(DefaultTableModel)addtocart.getModel();
       tm.setValueAt(jTextField25.getText(),addtocart.getSelectedRow(),1);
       tm.setValueAt(jTextField17.getText(),addtocart.getSelectedRow(),2);
       tm.setValueAt(jTextField16.getText(),addtocart.getSelectedRow(),3);

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