package com.aezart.simpleswingexample;

import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.SwingUtilities;

public class SimpleSwingExample {
    JFrame mainWindow = new JFrame();
    JButton helloButton = new JButton(new HelloAction());

    class HelloAction extends AbstractAction{
        public HelloAction(){
            super("Click me!");
        }
        @Override
        public void actionPerformed(ActionEvent arg0) {
            JOptionPane.showMessageDialog(mainWindow, "Hello, World.", "ALERT", JOptionPane.INFORMATION_MESSAGE);
        }
    }

    public SimpleSwingExample(){
        mainWindow.setTitle("Simple Swing Example");
        mainWindow.setPreferredSize(new Dimension(320,240));
        mainWindow.setLayout(new FlowLayout());
        mainWindow.add(helloButton);
        mainWindow.pack();
        mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        mainWindow.setLocationRelativeTo(null);
        mainWindow.setVisible(true);
    }

    public static void main(String[] args){
        SwingUtilities.invokeLater(() -> {
            SimpleSwingExample s = new SimpleSwingExample();
        });
    }
}