CounterPanel Class

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

public class CounterPanel extends Panel

implements ActionListener,

CounterObserver {

public CounterPanel(Counter ctr) {…}

public void actionPerformed(ActionEvent e) {…}

public void counterHasChanged(Counter ctr) {…}

Button incButton, decButton;

TextField valField;

Counter ctr;

}

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