ActionEvent : 컴포넌트가 활성화 될 때 발생 WindowEvent : 윈도우가 활성화 또는 닫힐 때 발생 import java.awt.Button; import java.awt.Frame; import java.awt.Panel; import java.awt.TextField; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class Main { public static void main(String[] args) { Frame frame = new Frame(); fra..