Basic Swing application using lambda as event listener.

Lecture4.java

package loonycorn.swing;

import java.awt.FlowLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class Lecture4 {

    public static void main(String[] args) {
        JFrame frame = new JFrame("My First Swing App");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JLabel label = new JLabel("Hello World");
        frame.getContentPane().add(label);
        
        JButton button = new JButton("Don't click me!");
        frame.getContentPane().add(button);
        button.addActionListener(e -> label.setText("What have you done ?!?"));
        
        frame.setLayout(new FlowLayout());
        
        frame.setSize(500, 500);
        frame.setVisible(true);
    }

}