GUI Swing ] Factory Method Pattern

<<interface>>Button

public interface Button {
	void render();
	void onClick();
}

 

HTMLButton

public class HtmlButton implements Button {

	public void render() {
		System.out.println("<button> Test Button</button>");
		onClick();
	}
	public void onClick() {
		System.out.println("Click ! button says - 'Hello'");
	}
}

 

 

WindowsButton

import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

public class WindowsButton implements Button {
	JFrame frame = new JFrame(); // 컨테이너 생성
	JPanel panel = new JPanel(); // 컨테이너 내에 각각 다른 컴포넌트를 생성해 나눌 때 필요.
	JButton button;
	
	
	@Override
	public void render() {
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		JLabel label = new JLabel("Hello welcome");
		label.setOpaque(true);
		label.setBackground(new Color(234,233,126));
		label.setFont(new Font("Dialog", Font.BOLD, 20));
		//label.setHorizontalAlignment(SwingConstants.CENTER);
		label.setVerticalAlignment(SwingConstants.CENTER);
		
		panel.setLayout(new FlowLayout(FlowLayout.CENTER));
		
		frame.getContentPane().add(panel);
		panel.add(label);
		onClick();
		panel.add(button);
		
		frame.setSize(320,200);
		frame.setVisible(true);
		onClick();
	}
	
	@Override
	public void onClick() {
		button = new JButton("Exit");
		button.addActionListener((ActionListener) new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				
				frame.setVisible(false);
				System.exit(0);
		}
		});
	
	}
}

 

 

 

Dialog

public abstract class Dialog {

	public void renderWindow() {
		Button okButton = createButton();
		okButton.render();
	}
	
	public abstract Button createButton();
}

 

 

HTMLDIalog

public class HtmlDialog extends Dialog{

	@Override
	public Button createButton() {
		return new HtmlButton();
	}

	
}

 

 

WindowsDialog

public class WindowsDialog extends Dialog{

	@Override
	public Button createButton() {
		return new WindowsButton();
	}

}

 

 

Demo

public class Demo {

	private static Dialog dialog;
	
	public static void main(String[] args) {
		configure();
		runBusinessLogic();
	}
	
	static void configure() {
		if (System.getProperty("os.name").contentEquals("Windows 10")) {
			dialog = new WindowsDialog();
		}
		else {
			dialog = new HtmlDialog();
		}
	}
	
	static void runBusinessLogic() {
		dialog.renderWindow();
	}
}