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+package Project.java;%0A%0Aimport java.awt.event.ActionEvent;%0A%0Aimport javax.swing.event.ListSelectionEvent;%0A%0Apublic class CashierFrame extends mainFrame %7B%0A%09%0A%09public CashierFrame(String title)%7B%0A%09%09super(title);%0A%09%7D%0A%09%0A%09public void actionPerformed(ActionEvent arg0) %7B%0A%09%7D%0A%0A%09public void valueChanged(ListSelectionEvent e) %7B%0A%09%7D%0A%7D%0A

Create CashierFrame.java