import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class GUIDemo implements Runnable /*, ActionListener*/ {
	private int count = 0;
	
	public static void main(String[] args) {
		SwingUtilities.invokeLater(new GUIDemo());
	}

	private JLabel labelCount;
	private JButton buttonCount, buttonReset;
	private JCheckBox decreaseCheckBox;
	
	// We can implement one ActionListener per button,
	// one for buttonCount, ...
	private class ButtonCountListener implements ActionListener {
		@Override
		public void actionPerformed(ActionEvent e) {
			if (decreaseCheckBox.isSelected()) {
				count--;
			} else {
				count++;
			}
			labelCount.setText(Integer.toString(count));
		}
		
	}

	// ... and one for buttonReset, ...
	private class ButtonResetListener implements ActionListener {
		@Override
		public void actionPerformed(ActionEvent e) {
			count = 0;
			labelCount.setText("0");
		}		
	}

	// ... or just one for both of them.
	// Here we let the class itself implement the interface
	// so ", ActionListener" needs to be added to its declaration line.
//	@Override
//	public void actionPerformed(ActionEvent e) {
//		if (e.getSource() == buttonCount) {
//			count++;
//			labelCount.setText(Integer.toString(count));
//		} else if (e.getSource() == buttonReset) {
//			count = 0;
//			labelCount.setText("0");
//		}
//	}


	@Override
	public void run() {
		JFrame frame = new JFrame("GUIDemo");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setLayout(new FlowLayout());

		labelCount = new JLabel("0");
		
		buttonCount = new JButton("Count");
		buttonCount.addActionListener(
				new ButtonCountListener());
//		buttonCount.addActionListener(this);
		
		buttonReset = new JButton("Reset");
		buttonReset.addActionListener(
				new ButtonResetListener());
//		buttonReset.addActionListener(this);
		
		JPanel panel = new JPanel();
		panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
		JLabel label1 = new JLabel("label1");
		JLabel label2 = new JLabel("label2");
		panel.add(label1);
		panel.add(label2);
		
		decreaseCheckBox = new JCheckBox("Decrease");
		
		frame.add(labelCount);
		frame.add(buttonCount);
		frame.add(buttonReset);
		frame.add(decreaseCheckBox);
		frame.add(panel);
		
		frame.pack();
		frame.setVisible(true);
	}

}