A brief discussion on javaSE GUI (Action event)

Normalize the classes you define and separate events and graphical components.

Define a class FrameDemo

Define member attribute Frame frame

Define member attribute Botton

Define the constructor FrameDemo()

Define the initialization method init()

In the initialization method, new Frame() comes out, parameter: String's form name

Call the setBounds() method of the Frame object, parameters: x, y, width, height

Call the setLayout() method of the Frame object, parameter: FlowLayout object

Get the Button object, new, construct the parameter: String button text

Call the add() method of the Frame object, parameters: Button object

Call the setVisible() method of the Frame object, parameter: true of Boolean

Define event method myEvent()

Call the addWindowListener() method of the Frame object, parameters: WindowListener object, WindowListener is an interface, there are seven methods to implement, find the subclass WindowAdapter, rewrite the windowClosing() method of the anonymous internal class, and pass in the parameters: WindowEvent object

Call the addActionListener() method of the Button object, parameter: ActionListener object, this class is an interface, so anonymous internal class is used to implement this interface, implement the method actionPerformed() method, and pass in the parameter: ActionEvent object

 import java.awt.Button;import java.awt.FlowLayout;import java.awt.Frame;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class FrameDemo { private Frame frame; private Button button; public FrameDemo() { init(); } /** * Initialization*/ public void init(){ frame=new Frame("test form"); frame.setBounds(300, 200, 200, 200); frame.setLayout(new FlowLayout()); button=new Button("Exit"); frame.add(button); frame.setVisible(true); addEventAction(); } /** * Add event*/ public void addEventAction(){ //Button exit button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { System.exit(0); } }); } /** * @param args */ public static void main(String[] args) { new FrameDemo(); }}

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