Calling a second frame from within an application

I have a main class that sets up a frame for a frame class. However, from that frame, there is a button from which I would like to open another frame for data entry. I have a second frame class built. I have an empty ActionEvent method written for the button on the first frame. Could someone tell me how to go about writing the code to call up the second frame as a modal frame?
thanks,
Dan

public void actionPerformed(ActionEvent ae)
     if (ae.getSource() == frame1Button)
          frame1.setVisible(false);
          frame2.setVisible(true);
}

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> I have a customer requirement for two LabVIEW executables. Based on
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> which are under independent revision control. I have created a third
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